./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_equal.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/sll2n_append_equal.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 f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:49:41,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:49:41,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:49:41,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:49:41,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:49:41,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:49:41,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:49:41,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:49:41,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:49:41,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:49:41,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:49:41,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:49:41,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:49:41,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:49:41,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:49:41,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:49:41,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:49:41,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:49:41,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:49:41,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:49:41,414 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:49:41,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:49:41,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:49:41,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:49:41,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:49:41,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:49:41,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:49:41,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:49:41,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:49:41,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:49:41,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:49:41,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:49:41,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:49:41,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:49:41,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:49:41,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:49:41,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:49:41,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:49:41,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:49:41,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:49:41,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:49:41,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:49:41,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:49:41,456 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:49:41,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:49:41,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:49:41,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:49:41,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:49:41,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:49:41,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:49:41,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:49:41,458 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:49:41,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:49:41,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:49:41,459 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:49:41,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:49:41,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:49:41,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:49:41,460 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:49:41,460 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:49:41,460 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:49:41,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:49:41,460 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:49:41,461 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:49:41,461 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:49:41,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:49:41,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:49:41,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:49:41,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:49:41,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:49:41,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:49:41,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:49:41,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:49:41,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2022-07-21 17:49:41,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:49:41,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:49:41,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:49:41,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:49:41,746 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:49:41,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2022-07-21 17:49:41,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967ff33f6/8dd2ae8e941c49dfa1c9f28330f6ea30/FLAGd913a0d66 [2022-07-21 17:49:42,162 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:49:42,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2022-07-21 17:49:42,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967ff33f6/8dd2ae8e941c49dfa1c9f28330f6ea30/FLAGd913a0d66 [2022-07-21 17:49:42,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967ff33f6/8dd2ae8e941c49dfa1c9f28330f6ea30 [2022-07-21 17:49:42,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:49:42,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:49:42,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:49:42,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:49:42,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:49:42,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:42,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d8e546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42, skipping insertion in model container [2022-07-21 17:49:42,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:42,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:49:42,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:49:42,850 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/sll2n_append_equal.i[24197,24210] [2022-07-21 17:49:42,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:49:42,861 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:49:42,897 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/sll2n_append_equal.i[24197,24210] [2022-07-21 17:49:42,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:49:42,921 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:49:42,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42 WrapperNode [2022-07-21 17:49:42,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:49:42,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:49:42,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:49:42,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:49:42,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:42,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:42,977 INFO L137 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 121 [2022-07-21 17:49:42,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:49:42,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:49:42,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:49:42,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:49:42,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:42,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:42,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:42,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:43,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:43,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:43,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:43,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:49:43,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:49:43,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:49:43,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:49:43,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (1/1) ... [2022-07-21 17:49:43,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:49:43,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:49:43,043 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 17:49:43,075 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 17:49:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:49:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:49:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-21 17:49:43,087 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-21 17:49:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:49:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:49:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:49:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:49:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:49:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:49:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:49:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:49:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:49:43,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:49:43,162 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:49:43,164 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:49:43,407 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:49:43,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:49:43,412 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 17:49:43,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:49:43 BoogieIcfgContainer [2022-07-21 17:49:43,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:49:43,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:49:43,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:49:43,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:49:43,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:49:42" (1/3) ... [2022-07-21 17:49:43,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f90022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:49:43, skipping insertion in model container [2022-07-21 17:49:43,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:42" (2/3) ... [2022-07-21 17:49:43,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f90022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:49:43, skipping insertion in model container [2022-07-21 17:49:43,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:49:43" (3/3) ... [2022-07-21 17:49:43,433 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2022-07-21 17:49:43,442 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:49:43,443 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2022-07-21 17:49:43,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:49:43,476 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@d6a11d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45839878 [2022-07-21 17:49:43,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-07-21 17:49:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 17:49:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:49:43,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:43,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:43,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:43,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904761, now seen corresponding path program 1 times [2022-07-21 17:49:43,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:49:43,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25033410] [2022-07-21 17:49:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:43,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:49:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:43,628 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 17:49:43,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:49:43,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25033410] [2022-07-21 17:49:43,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25033410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:43,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:43,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:49:43,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576403285] [2022-07-21 17:49:43,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:43,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:49:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:49:43,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:49:43,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:49:43,666 INFO L87 Difference]: Start difference. First operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:49:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:43,747 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-07-21 17:49:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:49:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-07-21 17:49:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:43,757 INFO L225 Difference]: With dead ends: 83 [2022-07-21 17:49:43,757 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 17:49:43,759 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 17:49:43,761 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:43,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:49:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 17:49:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-07-21 17:49:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 76 states have internal predecessors, (82), 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 17:49:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-07-21 17:49:43,791 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 7 [2022-07-21 17:49:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:43,792 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-07-21 17:49:43,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:49:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-07-21 17:49:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:49:43,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:43,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:43,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:49:43,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:43,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:43,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904762, now seen corresponding path program 1 times [2022-07-21 17:49:43,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:49:43,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33557549] [2022-07-21 17:49:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:43,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:49:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:43,853 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 17:49:43,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:49:43,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33557549] [2022-07-21 17:49:43,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33557549] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:43,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:43,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:49:43,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770941118] [2022-07-21 17:49:43,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:49:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:49:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:49:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:49:43,857 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:49:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:43,913 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-07-21 17:49:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:49:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-07-21 17:49:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:43,916 INFO L225 Difference]: With dead ends: 78 [2022-07-21 17:49:43,916 INFO L226 Difference]: Without dead ends: 78 [2022-07-21 17:49:43,919 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 17:49:43,920 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:43,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:49:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-21 17:49:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-21 17:49:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 74 states have internal predecessors, (80), 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 17:49:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-07-21 17:49:43,937 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 7 [2022-07-21 17:49:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:43,938 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-07-21 17:49:43,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:49:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-07-21 17:49:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:49:43,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:43,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:43,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:49:43,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810752, now seen corresponding path program 1 times [2022-07-21 17:49:43,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:49:43,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697634524] [2022-07-21 17:49:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:49:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:49:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,042 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 17:49:44,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:49:44,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697634524] [2022-07-21 17:49:44,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697634524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:44,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:44,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:49:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403400897] [2022-07-21 17:49:44,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:49:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:49:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:49:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:49:44,045 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 17:49:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:44,167 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-07-21 17:49:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:49:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 17:49:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:44,169 INFO L225 Difference]: With dead ends: 82 [2022-07-21 17:49:44,169 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 17:49:44,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 17:49:44,170 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:44,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 300 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:49:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 17:49:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-07-21 17:49:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 73 states have internal predecessors, (79), 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 17:49:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-07-21 17:49:44,175 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 13 [2022-07-21 17:49:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:44,176 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-07-21 17:49:44,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 17:49:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-07-21 17:49:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:49:44,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:44,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:44,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:49:44,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810753, now seen corresponding path program 1 times [2022-07-21 17:49:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:49:44,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766364138] [2022-07-21 17:49:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:44,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:49:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:49:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,321 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 17:49:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:49:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766364138] [2022-07-21 17:49:44,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766364138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:44,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:44,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:49:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824892037] [2022-07-21 17:49:44,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:44,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:49:44,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:49:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:49:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:49:44,323 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 17:49:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:44,451 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-07-21 17:49:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:49:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 17:49:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:44,452 INFO L225 Difference]: With dead ends: 81 [2022-07-21 17:49:44,452 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 17:49:44,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 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 17:49:44,453 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 9 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:44,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:49:44,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 17:49:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-07-21 17:49:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 72 states have internal predecessors, (78), 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 17:49:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-07-21 17:49:44,457 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 13 [2022-07-21 17:49:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:44,458 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-07-21 17:49:44,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 17:49:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-07-21 17:49:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:49:44,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:44,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:44,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:49:44,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:44,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1399608384, now seen corresponding path program 1 times [2022-07-21 17:49:44,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:49:44,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982374856] [2022-07-21 17:49:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:44,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:49:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 17:49:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,517 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 17:49:44,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:49:44,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982374856] [2022-07-21 17:49:44,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982374856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:44,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:44,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:49:44,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591558086] [2022-07-21 17:49:44,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:44,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:49:44,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:49:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:49:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:49:44,519 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17:49:44,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:44,563 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-07-21 17:49:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:49:44,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2022-07-21 17:49:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:44,565 INFO L225 Difference]: With dead ends: 82 [2022-07-21 17:49:44,565 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 17:49:44,565 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 17:49:44,574 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:44,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 192 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:49:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 17:49:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-07-21 17:49:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 73 states have internal predecessors, (79), 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 17:49:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-07-21 17:49:44,579 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 15 [2022-07-21 17:49:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:44,579 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-07-21 17:49:44,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17:49:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-07-21 17:49:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:49:44,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:44,580 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] [2022-07-21 17:49:44,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:49:44,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:44,581 INFO L85 PathProgramCache]: Analyzing trace with hash -898428094, now seen corresponding path program 1 times [2022-07-21 17:49:44,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:49:44,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152937151] [2022-07-21 17:49:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:44,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:49:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:49:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 17:49:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,640 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 17:49:44,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:49:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152937151] [2022-07-21 17:49:44,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152937151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:49:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129813770] [2022-07-21 17:49:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:44,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:49:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:49:44,642 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 17:49:44,686 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 17:49:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:44,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:49:44,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:49:44,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:49:44,821 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 17:49:44,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129813770] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:49:44,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:49:44,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-07-21 17:49:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093345834] [2022-07-21 17:49:44,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:49:44,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:49:44,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:49:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:49:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:49:44,823 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:49:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:44,874 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-07-21 17:49:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:49:44,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-07-21 17:49:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:44,875 INFO L225 Difference]: With dead ends: 83 [2022-07-21 17:49:44,875 INFO L226 Difference]: Without dead ends: 83 [2022-07-21 17:49:44,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:49:44,876 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:44,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:49:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-21 17:49:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-07-21 17:49:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 78 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:49:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-07-21 17:49:44,880 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 28 [2022-07-21 17:49:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:44,880 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-07-21 17:49:44,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:49:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-07-21 17:49:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:49:44,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:44,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:44,903 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 17:49:45,102 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 17:49:45,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186176, now seen corresponding path program 2 times [2022-07-21 17:49:45,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:49:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068684012] [2022-07-21 17:49:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:45,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:49:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:45,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:49:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:45,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 17:49:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 17:49:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 17:49:45,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:49:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068684012] [2022-07-21 17:49:45,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068684012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:49:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584459055] [2022-07-21 17:49:45,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:49:45,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:49:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:49:45,347 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 17:49:45,367 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 17:49:45,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:49:45,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:49:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:49:45,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:45,491 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 17:49:45,505 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 17:49:45,549 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:49:45,549 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 14 [2022-07-21 17:49:45,596 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 17:49:45,716 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:49:45,717 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 14 [2022-07-21 17:49:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 17:49:45,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:49:45,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584459055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:49:45,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:49:45,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2022-07-21 17:49:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884065370] [2022-07-21 17:49:45,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:49:45,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:49:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:49:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:49:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:49:45,873 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 17:49:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:46,045 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2022-07-21 17:49:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:49:46,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-07-21 17:49:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:46,046 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:49:46,046 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:49:46,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:49:46,047 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 87 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:46,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 300 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 224 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-07-21 17:49:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:49:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2022-07-21 17:49:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 74 states have internal predecessors, (80), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:49:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-07-21 17:49:46,051 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 41 [2022-07-21 17:49:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:46,051 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-07-21 17:49:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 17:49:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-07-21 17:49:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:49:46,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:46,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:46,089 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 17:49:46,259 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 17:49:46,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:46,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186175, now seen corresponding path program 1 times [2022-07-21 17:49:46,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:49:46,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344153410] [2022-07-21 17:49:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:49:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:46,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 17:49:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:46,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 17:49:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:46,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 17:49:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:49:46,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:49:46,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344153410] [2022-07-21 17:49:46,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344153410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:49:46,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634310733] [2022-07-21 17:49:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:46,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:49:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:49:46,508 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 17:49:46,509 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 17:49:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:49:46,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:46,618 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 17:49:46,631 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 17:49:46,712 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-21 17:49:46,729 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 17:49:46,923 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 17:49:46,924 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 32019 column 46: unknown constant v_#length_BEFORE_CALL_2 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 17:49:46,927 INFO L158 Benchmark]: Toolchain (without parser) took 4394.01ms. Allocated memory was 58.7MB in the beginning and 92.3MB in the end (delta: 33.6MB). Free memory was 41.8MB in the beginning and 34.2MB in the end (delta: 7.6MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2022-07-21 17:49:46,927 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 48.2MB. Free memory was 30.2MB in the beginning and 30.2MB in the end (delta: 41.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:49:46,927 INFO L158 Benchmark]: CACSL2BoogieTranslator took 389.70ms. Allocated memory is still 58.7MB. Free memory was 41.6MB in the beginning and 34.0MB in the end (delta: 7.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 17:49:46,927 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.48ms. Allocated memory is still 58.7MB. Free memory was 34.0MB in the beginning and 31.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:49:46,927 INFO L158 Benchmark]: Boogie Preprocessor took 37.40ms. Allocated memory is still 58.7MB. Free memory was 31.9MB in the beginning and 30.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:49:46,928 INFO L158 Benchmark]: RCFGBuilder took 396.86ms. Allocated memory is still 58.7MB. Free memory was 30.1MB in the beginning and 26.7MB in the end (delta: 3.4MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2022-07-21 17:49:46,929 INFO L158 Benchmark]: TraceAbstraction took 3502.36ms. Allocated memory was 58.7MB in the beginning and 92.3MB in the end (delta: 33.6MB). Free memory was 39.7MB in the beginning and 34.2MB in the end (delta: 5.5MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. [2022-07-21 17:49:46,930 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 48.2MB. Free memory was 30.2MB in the beginning and 30.2MB in the end (delta: 41.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 389.70ms. Allocated memory is still 58.7MB. Free memory was 41.6MB in the beginning and 34.0MB in the end (delta: 7.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.48ms. Allocated memory is still 58.7MB. Free memory was 34.0MB in the beginning and 31.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.40ms. Allocated memory is still 58.7MB. Free memory was 31.9MB in the beginning and 30.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 396.86ms. Allocated memory is still 58.7MB. Free memory was 30.1MB in the beginning and 26.7MB in the end (delta: 3.4MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3502.36ms. Allocated memory was 58.7MB in the beginning and 92.3MB in the end (delta: 33.6MB). Free memory was 39.7MB in the beginning and 34.2MB in the end (delta: 5.5MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 32019 column 46: unknown constant v_#length_BEFORE_CALL_2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 32019 column 46: unknown constant v_#length_BEFORE_CALL_2: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-21 17:49:46,943 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/sll2n_append_equal.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 f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:49:48,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:49:48,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:49:48,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:49:48,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:49:48,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:49:48,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:49:48,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:49:48,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:49:48,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:49:48,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:49:48,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:49:48,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:49:48,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:49:48,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:49:48,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:49:48,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:49:48,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:49:48,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:49:48,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:49:48,806 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:49:48,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:49:48,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:49:48,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:49:48,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:49:48,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:49:48,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:49:48,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:49:48,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:49:48,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:49:48,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:49:48,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:49:48,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:49:48,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:49:48,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:49:48,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:49:48,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:49:48,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:49:48,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:49:48,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:49:48,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:49:48,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:49:48,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:49:48,852 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:49:48,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:49:48,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:49:48,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:49:48,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:49:48,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:49:48,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:49:48,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:49:48,855 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:49:48,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:49:48,856 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:49:48,863 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:49:48,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:49:48,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:49:48,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:49:48,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:49:48,864 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:49:48,865 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:49:48,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:49:48,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:49:48,865 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:49:48,865 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:49:48,865 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:49:48,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:49:48,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:49:48,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:49:48,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:49:48,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:49:48,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:49:48,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:49:48,867 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:49:48,867 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:49:48,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:49:48,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2022-07-21 17:49:49,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:49:49,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:49:49,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:49:49,137 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:49:49,138 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:49:49,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2022-07-21 17:49:49,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6001a26/ef3e8e71669e448086ac37fb3bb373d3/FLAG3fc65e586 [2022-07-21 17:49:49,540 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:49:49,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2022-07-21 17:49:49,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6001a26/ef3e8e71669e448086ac37fb3bb373d3/FLAG3fc65e586 [2022-07-21 17:49:49,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6001a26/ef3e8e71669e448086ac37fb3bb373d3 [2022-07-21 17:49:49,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:49:49,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:49:49,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:49:49,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:49:49,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:49:49,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:49:49" (1/1) ... [2022-07-21 17:49:49,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487b473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:49, skipping insertion in model container [2022-07-21 17:49:49,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:49:49" (1/1) ... [2022-07-21 17:49:49,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:49:49,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:49:50,210 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/sll2n_append_equal.i[24197,24210] [2022-07-21 17:49:50,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:49:50,233 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:49:50,265 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/sll2n_append_equal.i[24197,24210] [2022-07-21 17:49:50,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:49:50,304 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:49:50,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50 WrapperNode [2022-07-21 17:49:50,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:49:50,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:49:50,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:49:50,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:49:50,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,360 INFO L137 Inliner]: procedures = 130, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2022-07-21 17:49:50,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:49:50,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:49:50,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:49:50,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:49:50,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:49:50,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:49:50,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:49:50,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:49:50,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (1/1) ... [2022-07-21 17:49:50,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:49:50,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:49:50,440 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 17:49:50,457 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 17:49:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 17:49:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-21 17:49:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-21 17:49:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:49:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:49:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:49:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:49:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:49:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:49:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 17:49:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:49:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 17:49:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:49:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:49:50,552 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:49:50,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:49:50,799 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:49:50,803 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:49:50,804 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 17:49:50,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:49:50 BoogieIcfgContainer [2022-07-21 17:49:50,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:49:50,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:49:50,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:49:50,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:49:50,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:49:49" (1/3) ... [2022-07-21 17:49:50,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f61f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:49:50, skipping insertion in model container [2022-07-21 17:49:50,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:49:50" (2/3) ... [2022-07-21 17:49:50,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f61f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:49:50, skipping insertion in model container [2022-07-21 17:49:50,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:49:50" (3/3) ... [2022-07-21 17:49:50,811 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2022-07-21 17:49:50,820 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:49:50,835 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2022-07-21 17:49:50,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:49:50,905 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@72e4ddd9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f8016be [2022-07-21 17:49:50,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-07-21 17:49:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 17:49:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:49:50,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:50,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:50,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:50,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904761, now seen corresponding path program 1 times [2022-07-21 17:49:50,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:49:50,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013516619] [2022-07-21 17:49:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:50,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:49:50,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:49:50,951 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 17:49:50,980 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 17:49:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:51,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:49:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:51,107 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 17:49:51,116 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 17:49:51,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:49:51,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:49:51,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013516619] [2022-07-21 17:49:51,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013516619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:51,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:51,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:49:51,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189122805] [2022-07-21 17:49:51,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:49:51,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:49:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:49:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:49:51,138 INFO L87 Difference]: Start difference. First operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:49:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:51,248 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-07-21 17:49:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:49:51,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-07-21 17:49:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:51,254 INFO L225 Difference]: With dead ends: 83 [2022-07-21 17:49:51,255 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 17:49:51,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 17:49:51,258 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:51,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:49:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 17:49:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-07-21 17:49:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 76 states have internal predecessors, (82), 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 17:49:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-07-21 17:49:51,284 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 7 [2022-07-21 17:49:51,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:51,285 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-07-21 17:49:51,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:49:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-07-21 17:49:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:49:51,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:51,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:51,295 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 17:49:51,496 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 17:49:51,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904762, now seen corresponding path program 1 times [2022-07-21 17:49:51,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:49:51,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911584377] [2022-07-21 17:49:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:51,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:49:51,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:49:51,499 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 17:49:51,501 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 17:49:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:49:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:51,564 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 17:49:51,582 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 17:49:51,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:49:51,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:49:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911584377] [2022-07-21 17:49:51,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911584377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:51,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:51,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:49:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588726261] [2022-07-21 17:49:51,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:51,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:49:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:49:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:49:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:49:51,584 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:49:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:51,686 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-07-21 17:49:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:49:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-07-21 17:49:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:51,688 INFO L225 Difference]: With dead ends: 78 [2022-07-21 17:49:51,688 INFO L226 Difference]: Without dead ends: 78 [2022-07-21 17:49:51,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 17:49:51,689 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:51,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:49:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-21 17:49:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-21 17:49:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 74 states have internal predecessors, (80), 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 17:49:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-07-21 17:49:51,694 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 7 [2022-07-21 17:49:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:51,694 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-07-21 17:49:51,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:49:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-07-21 17:49:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:49:51,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:51,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:51,705 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 17:49:51,897 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 17:49:51,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810752, now seen corresponding path program 1 times [2022-07-21 17:49:51,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:49:51,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877457792] [2022-07-21 17:49:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:51,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:49:51,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:49:51,901 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 17:49:51,903 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 17:49:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:51,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:49:51,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:52,003 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 17:49:52,033 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 17:49:52,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:49:52,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:49:52,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877457792] [2022-07-21 17:49:52,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877457792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:52,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:52,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:49:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957793189] [2022-07-21 17:49:52,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:52,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:49:52,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:49:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:49:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:49:52,035 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 17:49:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:52,216 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-07-21 17:49:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:49:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 17:49:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:52,218 INFO L225 Difference]: With dead ends: 82 [2022-07-21 17:49:52,218 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 17:49:52,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 17:49:52,219 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 10 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:52,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 268 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:49:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 17:49:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-07-21 17:49:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 73 states have internal predecessors, (79), 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 17:49:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-07-21 17:49:52,225 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 13 [2022-07-21 17:49:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:52,226 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-07-21 17:49:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 17:49:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-07-21 17:49:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:49:52,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:52,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:52,248 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 17:49:52,448 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 17:49:52,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810753, now seen corresponding path program 1 times [2022-07-21 17:49:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:49:52,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265361485] [2022-07-21 17:49:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:49:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:49:52,451 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 17:49:52,461 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 17:49:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:52,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:49:52,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:52,585 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 17:49:52,657 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 17:49:52,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:49:52,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:49:52,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265361485] [2022-07-21 17:49:52,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265361485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:52,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:52,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:49:52,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134472059] [2022-07-21 17:49:52,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:52,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:49:52,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:49:52,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:49:52,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:49:52,660 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 17:49:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:52,867 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-07-21 17:49:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:49:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 17:49:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:52,870 INFO L225 Difference]: With dead ends: 81 [2022-07-21 17:49:52,870 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 17:49:52,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 17:49:52,871 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 9 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:52,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 284 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:49:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 17:49:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-07-21 17:49:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 72 states have internal predecessors, (78), 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 17:49:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-07-21 17:49:52,876 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 13 [2022-07-21 17:49:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:52,876 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-07-21 17:49:52,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 17:49:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-07-21 17:49:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:49:52,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:52,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:52,886 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 17:49:53,084 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 17:49:53,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1399608384, now seen corresponding path program 1 times [2022-07-21 17:49:53,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:49:53,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921628813] [2022-07-21 17:49:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:53,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:49:53,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:49:53,100 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 17:49:53,135 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 17:49:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:53,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:49:53,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:53,177 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 17:49:53,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:49:53,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:49:53,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921628813] [2022-07-21 17:49:53,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921628813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:49:53,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:49:53,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:49:53,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842929277] [2022-07-21 17:49:53,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:49:53,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:49:53,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:49:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:49:53,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:49:53,182 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17:49:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:53,187 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-07-21 17:49:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:49:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2022-07-21 17:49:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:53,188 INFO L225 Difference]: With dead ends: 82 [2022-07-21 17:49:53,189 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 17:49:53,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 17:49:53,189 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 159 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 17:49:53,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 159 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:49:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 17:49:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-07-21 17:49:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 73 states have internal predecessors, (79), 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 17:49:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-07-21 17:49:53,194 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 15 [2022-07-21 17:49:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:53,194 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-07-21 17:49:53,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17:49:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-07-21 17:49:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:49:53,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:53,196 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] [2022-07-21 17:49:53,206 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 17:49:53,406 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 17:49:53,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash -898428094, now seen corresponding path program 1 times [2022-07-21 17:49:53,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:49:53,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065126733] [2022-07-21 17:49:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:49:53,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:49:53,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:49:53,409 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 17:49:53,410 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 17:49:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:49:53,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:49:53,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:49:53,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:49:53,584 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 17:49:53,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:49:53,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065126733] [2022-07-21 17:49:53,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065126733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:49:53,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:49:53,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-21 17:49:53,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852099908] [2022-07-21 17:49:53,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:49:53,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:49:53,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:49:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:49:53,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:49:53,587 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:49:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:49:53,621 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-07-21 17:49:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:49:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-07-21 17:49:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:49:53,630 INFO L225 Difference]: With dead ends: 88 [2022-07-21 17:49:53,630 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:49:53,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:49:53,639 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 11 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:49:53,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 317 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:49:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:49:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-07-21 17:49:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 78 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:49:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-07-21 17:49:53,644 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 28 [2022-07-21 17:49:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:49:53,644 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-07-21 17:49:53,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:49:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-07-21 17:49:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:49:53,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:49:53,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:49:53,675 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 17:49:53,852 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 17:49:53,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:49:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:49:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186176, now seen corresponding path program 2 times [2022-07-21 17:49:53,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:49:53,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541685073] [2022-07-21 17:49:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:49:53,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:49:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:49:53,855 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 17:49:53,857 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 17:49:53,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:49:53,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:49:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:49:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:54,014 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 17:49:54,038 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 7 treesize of output 5 [2022-07-21 17:49:54,174 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:49:54,175 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 20 treesize of output 27 [2022-07-21 17:49:54,215 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 7 treesize of output 5 [2022-07-21 17:49:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:49:54,279 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 17:49:54,422 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:49:54,422 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 17 [2022-07-21 17:49:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:49:54,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:49:54,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:49:54,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541685073] [2022-07-21 17:49:54,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541685073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:49:54,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1684183165] [2022-07-21 17:49:54,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:49:54,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:49:54,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:49:54,665 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 17:49:54,684 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 17:49:54,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:49:54,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982093289] [2022-07-21 17:49:54,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:49:54,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:49:54,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:49:54,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:49:54,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 1 [2022-07-21 17:49:54,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:49:55,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:49:55,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:49:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:49:55,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:49:55,022 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 17:49:57,101 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:49:57,102 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 18 treesize of output 25 [2022-07-21 17:49:57,185 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:49:57,185 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 17 [2022-07-21 17:49:57,277 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:49:57,278 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 17 [2022-07-21 17:49:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 8 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 17:49:57,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:49:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:49:57,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982093289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:49:57,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:49:57,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 15 [2022-07-21 17:49:57,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985455655] [2022-07-21 17:49:57,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:49:57,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:49:57,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:49:57,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:49:57,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2022-07-21 17:49:57,652 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 17:50:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:05,889 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-07-21 17:50:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:50:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2022-07-21 17:50:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:05,890 INFO L225 Difference]: With dead ends: 100 [2022-07-21 17:50:05,890 INFO L226 Difference]: Without dead ends: 100 [2022-07-21 17:50:05,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 106 SyntacticMatches, 19 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=92, Invalid=369, Unknown=1, NotChecked=0, Total=462 [2022-07-21 17:50:05,891 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 36 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:05,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 303 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2022-07-21 17:50:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-21 17:50:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2022-07-21 17:50:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 82 states have internal predecessors, (88), 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 17:50:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-07-21 17:50:05,896 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 41 [2022-07-21 17:50:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:05,897 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-07-21 17:50:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 17:50:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-07-21 17:50:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:50:05,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:05,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:05,923 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 17:50:06,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:06,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:50:06,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:06,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186175, now seen corresponding path program 1 times [2022-07-21 17:50:06,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:06,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675718959] [2022-07-21 17:50:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:06,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:06,334 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 17:50:06,336 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 17:50:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:06,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:50:06,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:06,513 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 17:50:06,517 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 17:50:06,539 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 17:50:06,543 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 17:50:08,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:08,630 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 17:50:08,637 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:50:08,638 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 12 treesize of output 12 [2022-07-21 17:50:08,686 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 17:50:10,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:10,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:50:11,047 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:50:11,048 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 17:50:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:50:11,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:11,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:11,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675718959] [2022-07-21 17:50:11,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675718959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:11,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550346194] [2022-07-21 17:50:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:11,344 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:50:11,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:50:11,347 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:50:11,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-07-21 17:50:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:50:11,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:11,588 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 17:50:11,600 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 17:50:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:11,702 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 17:50:11,788 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 17:50:14,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:14,011 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 17:50:14,181 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 17:50:14,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:14,322 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 17:50:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 17:50:14,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:14,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550346194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:14,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:50:14,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-07-21 17:50:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123760554] [2022-07-21 17:50:14,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:50:14,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:50:14,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:50:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2022-07-21 17:50:14,569 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:50:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:21,489 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-07-21 17:50:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:50:21,489 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-07-21 17:50:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:21,490 INFO L225 Difference]: With dead ends: 94 [2022-07-21 17:50:21,490 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 17:50:21,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=115, Invalid=809, Unknown=6, NotChecked=0, Total=930 [2022-07-21 17:50:21,491 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 4 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:21,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 660 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 277 Unchecked, 0.2s Time] [2022-07-21 17:50:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 17:50:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-21 17:50:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.453125) internal successors, (93), 87 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2022-07-21 17:50:21,494 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 41 [2022-07-21 17:50:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:21,494 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2022-07-21 17:50:21,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:50:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2022-07-21 17:50:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 17:50:21,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:21,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:21,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-07-21 17:50:21,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:21,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:50:21,904 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:21,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1843554241, now seen corresponding path program 1 times [2022-07-21 17:50:21,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:21,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964818395] [2022-07-21 17:50:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:21,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:21,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:21,906 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:50:21,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:50:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 17:50:22,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:50:22,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:22,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964818395] [2022-07-21 17:50:22,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964818395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:22,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:22,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:50:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933461721] [2022-07-21 17:50:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:22,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:50:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:22,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:50:22,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:50:22,047 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 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 17:50:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:22,146 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-07-21 17:50:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:50:22,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 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 43 [2022-07-21 17:50:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:22,147 INFO L225 Difference]: With dead ends: 104 [2022-07-21 17:50:22,147 INFO L226 Difference]: Without dead ends: 104 [2022-07-21 17:50:22,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 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 17:50:22,148 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:22,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 77 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:50:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-21 17:50:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2022-07-21 17:50:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.421875) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-07-21 17:50:22,151 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 43 [2022-07-21 17:50:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:22,152 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-07-21 17:50:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 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 17:50:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-07-21 17:50:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 17:50:22,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:22,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:22,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:22,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:50:22,361 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:22,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1843554242, now seen corresponding path program 1 times [2022-07-21 17:50:22,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:22,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437636413] [2022-07-21 17:50:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:22,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:22,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:22,375 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 17:50:22,376 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 17:50:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:50:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:50:22,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:22,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:22,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437636413] [2022-07-21 17:50:22,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437636413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:22,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:22,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:50:22,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953070191] [2022-07-21 17:50:22,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:50:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:50:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:50:22,579 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 17:50:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:22,694 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-07-21 17:50:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:50:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) Word has length 43 [2022-07-21 17:50:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:22,695 INFO L225 Difference]: With dead ends: 90 [2022-07-21 17:50:22,695 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 17:50:22,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:50:22,696 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 108 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:22,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 96 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:50:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 17:50:22,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-21 17:50:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.390625) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-07-21 17:50:22,699 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 43 [2022-07-21 17:50:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:22,699 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-07-21 17:50:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 17:50:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-07-21 17:50:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:50:22,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:22,700 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:22,710 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 17:50:22,900 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 17:50:22,900 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:22,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2129100770, now seen corresponding path program 1 times [2022-07-21 17:50:22,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:22,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992095196] [2022-07-21 17:50:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:22,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:22,902 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 17:50:22,904 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 17:50:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:23,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:50:23,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:50:23,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:23,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:23,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992095196] [2022-07-21 17:50:23,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992095196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:23,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:23,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:50:23,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936965357] [2022-07-21 17:50:23,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:23,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:50:23,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:23,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:50:23,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:50:23,053 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 17:50:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:23,151 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-07-21 17:50:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:50:23,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) Word has length 45 [2022-07-21 17:50:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:23,153 INFO L225 Difference]: With dead ends: 101 [2022-07-21 17:50:23,154 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:50:23,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:50:23,155 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 109 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:23,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 91 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:50:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:50:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2022-07-21 17:50:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.375) internal successors, (88), 82 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-07-21 17:50:23,167 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 45 [2022-07-21 17:50:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:23,168 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-07-21 17:50:23,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 17:50:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-07-21 17:50:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:50:23,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:23,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:23,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:23,374 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 17:50:23,374 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:23,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:23,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2129100771, now seen corresponding path program 1 times [2022-07-21 17:50:23,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:23,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762623906] [2022-07-21 17:50:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:23,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:23,376 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 17:50:23,378 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 17:50:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:23,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:50:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:50:23,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:23,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:23,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762623906] [2022-07-21 17:50:23,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762623906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:23,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:23,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:50:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582805054] [2022-07-21 17:50:23,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:23,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:50:23,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:50:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:50:23,614 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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 17:50:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:23,706 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-07-21 17:50:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:50:23,707 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), 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) Word has length 45 [2022-07-21 17:50:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:23,707 INFO L225 Difference]: With dead ends: 87 [2022-07-21 17:50:23,707 INFO L226 Difference]: Without dead ends: 87 [2022-07-21 17:50:23,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:50:23,708 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 146 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:23,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 78 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:50:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-21 17:50:23,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-21 17:50:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.34375) internal successors, (86), 80 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2022-07-21 17:50:23,710 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 45 [2022-07-21 17:50:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:23,710 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2022-07-21 17:50:23,710 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), 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 17:50:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2022-07-21 17:50:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:50:23,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:23,711 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:23,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:23,925 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 17:50:23,926 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2129253767, now seen corresponding path program 1 times [2022-07-21 17:50:23,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:23,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789498049] [2022-07-21 17:50:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:23,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:23,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:23,928 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 17:50:23,930 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 17:50:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:24,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:50:24,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:24,164 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 17:50:24,270 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:50:24,381 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 9 treesize of output 5 [2022-07-21 17:50:24,391 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 7 treesize of output 3 [2022-07-21 17:50:24,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:24,610 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 14 treesize of output 16 [2022-07-21 17:50:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:24,619 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 16 treesize of output 18 [2022-07-21 17:50:24,638 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-21 17:50:24,639 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 16 treesize of output 18 [2022-07-21 17:50:24,740 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 17:50:24,746 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 17:50:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:50:25,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:25,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:25,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789498049] [2022-07-21 17:50:25,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789498049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:25,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [239603701] [2022-07-21 17:50:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:25,765 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:50:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:50:25,773 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:50:25,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-21 17:50:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 17:50:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:26,186 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 17:50:26,201 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 17:50:26,838 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 22 treesize of output 14 [2022-07-21 17:50:26,844 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 7 treesize of output 3 [2022-07-21 17:50:27,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:27,352 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 28 treesize of output 28 [2022-07-21 17:50:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:27,366 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 14 treesize of output 16 [2022-07-21 17:50:27,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:27,374 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 16 treesize of output 18 [2022-07-21 17:50:27,388 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 17:50:27,388 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 19 treesize of output 19 [2022-07-21 17:50:27,564 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 25 treesize of output 13 [2022-07-21 17:50:27,570 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 17:50:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:50:27,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:28,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [239603701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:28,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:50:28,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-21 17:50:28,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818375785] [2022-07-21 17:50:28,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:50:28,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 17:50:28,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 17:50:28,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1252, Unknown=21, NotChecked=0, Total=1406 [2022-07-21 17:50:28,394 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:50:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:29,418 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-07-21 17:50:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:50:29,419 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2022-07-21 17:50:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:29,419 INFO L225 Difference]: With dead ends: 88 [2022-07-21 17:50:29,419 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:50:29,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=208, Invalid=1835, Unknown=27, NotChecked=0, Total=2070 [2022-07-21 17:50:29,420 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 22 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:29,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 364 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 170 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-07-21 17:50:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:50:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-21 17:50:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.353846153846154) internal successors, (88), 81 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-07-21 17:50:29,423 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 45 [2022-07-21 17:50:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:29,423 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-07-21 17:50:29,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:50:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-07-21 17:50:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:50:29,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:29,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:29,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:29,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:29,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:50:29,824 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2129253766, now seen corresponding path program 1 times [2022-07-21 17:50:29,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:29,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355861402] [2022-07-21 17:50:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:29,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:29,827 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 17:50:29,830 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 17:50:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:30,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 17:50:30,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:30,084 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 17:50:30,146 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:50:30,240 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 12 treesize of output 8 [2022-07-21 17:50:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:30,406 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 19 treesize of output 21 [2022-07-21 17:50:30,420 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-07-21 17:50:30,420 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 19 treesize of output 24 [2022-07-21 17:50:30,496 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 21 treesize of output 13 [2022-07-21 17:50:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:50:30,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:31,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:31,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355861402] [2022-07-21 17:50:31,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355861402] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:31,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [513858169] [2022-07-21 17:50:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:31,155 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:50:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:50:31,156 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:50:31,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-21 17:50:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 17:50:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:31,570 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 17:50:31,864 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 12 treesize of output 8 [2022-07-21 17:50:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:32,131 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 19 treesize of output 21 [2022-07-21 17:50:32,153 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-21 17:50:32,153 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 25 treesize of output 36 [2022-07-21 17:50:32,287 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 16 [2022-07-21 17:50:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:50:32,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:32,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [513858169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:32,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:50:32,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-07-21 17:50:32,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504777685] [2022-07-21 17:50:32,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:50:32,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 17:50:32,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 17:50:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=923, Unknown=17, NotChecked=0, Total=1056 [2022-07-21 17:50:32,508 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:50:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:33,091 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2022-07-21 17:50:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:50:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2022-07-21 17:50:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:33,092 INFO L225 Difference]: With dead ends: 117 [2022-07-21 17:50:33,092 INFO L226 Difference]: Without dead ends: 117 [2022-07-21 17:50:33,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=1430, Unknown=23, NotChecked=0, Total=1640 [2022-07-21 17:50:33,093 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 54 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:33,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 474 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 198 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-07-21 17:50:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-21 17:50:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2022-07-21 17:50:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-07-21 17:50:33,095 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 45 [2022-07-21 17:50:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:33,095 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-07-21 17:50:33,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:50:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-07-21 17:50:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:50:33,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:33,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:33,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-07-21 17:50:33,307 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 17:50:33,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:50:33,503 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1808436912, now seen corresponding path program 1 times [2022-07-21 17:50:33,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:33,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167766968] [2022-07-21 17:50:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:33,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:33,506 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 17:50:33,507 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 17:50:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:33,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 17:50:33,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:50:33,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:33,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167766968] [2022-07-21 17:50:33,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167766968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:33,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:33,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:50:33,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008009275] [2022-07-21 17:50:33,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:33,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:50:33,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:33,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:50:33,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:50:33,658 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 17:50:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:33,766 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2022-07-21 17:50:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:50:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 47 [2022-07-21 17:50:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:33,768 INFO L225 Difference]: With dead ends: 115 [2022-07-21 17:50:33,768 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 17:50:33,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 17:50:33,770 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:33,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 124 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:50:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 17:50:33,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 86. [2022-07-21 17:50:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 79 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2022-07-21 17:50:33,774 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 47 [2022-07-21 17:50:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:33,775 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2022-07-21 17:50:33,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 17:50:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2022-07-21 17:50:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:50:33,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:33,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:33,799 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 17:50:33,985 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 17:50:33,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1808436913, now seen corresponding path program 1 times [2022-07-21 17:50:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:33,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109659837] [2022-07-21 17:50:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:33,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:33,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:34,003 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 17:50:34,004 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 17:50:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:50:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:50:34,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:34,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:34,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109659837] [2022-07-21 17:50:34,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109659837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:34,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:34,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:50:34,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547636981] [2022-07-21 17:50:34,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:34,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:50:34,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:50:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:50:34,210 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 17:50:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:34,380 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2022-07-21 17:50:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:50:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 47 [2022-07-21 17:50:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:34,382 INFO L225 Difference]: With dead ends: 115 [2022-07-21 17:50:34,382 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 17:50:34,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 17:50:34,383 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 36 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:34,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 132 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:50:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 17:50:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2022-07-21 17:50:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 77 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-07-21 17:50:34,392 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 47 [2022-07-21 17:50:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:34,393 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-07-21 17:50:34,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 17:50:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-07-21 17:50:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:50:34,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:34,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:34,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-21 17:50:34,601 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 17:50:34,601 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash -35949242, now seen corresponding path program 1 times [2022-07-21 17:50:34,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:34,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264089186] [2022-07-21 17:50:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:34,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:34,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:34,604 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 17:50:34,605 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 17:50:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:34,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:50:34,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:34,764 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 17:50:34,831 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:50:34,845 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 17:50:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 17:50:34,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:34,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264089186] [2022-07-21 17:50:34,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264089186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:34,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:34,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:50:34,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102361636] [2022-07-21 17:50:34,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:34,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:50:34,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:34,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:50:34,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:50:34,868 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 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 17:50:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:35,322 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2022-07-21 17:50:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:50:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 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 48 [2022-07-21 17:50:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:35,323 INFO L225 Difference]: With dead ends: 145 [2022-07-21 17:50:35,323 INFO L226 Difference]: Without dead ends: 145 [2022-07-21 17:50:35,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:50:35,324 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 159 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:35,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 279 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:50:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-21 17:50:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 88. [2022-07-21 17:50:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-07-21 17:50:35,326 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 48 [2022-07-21 17:50:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:35,326 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-07-21 17:50:35,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 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 17:50:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-07-21 17:50:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:50:35,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:35,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:35,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-21 17:50:35,527 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 17:50:35,528 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash -35949241, now seen corresponding path program 1 times [2022-07-21 17:50:35,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659396674] [2022-07-21 17:50:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:35,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:35,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:35,530 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 17:50:35,531 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 17:50:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:35,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:50:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:35,714 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 17:50:35,814 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:50:35,819 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:50:35,842 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 17:50:35,845 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 17:50:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 17:50:35,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:35,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:35,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659396674] [2022-07-21 17:50:35,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659396674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:35,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:35,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:50:35,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81366718] [2022-07-21 17:50:35,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:35,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:50:35,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:35,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:50:35,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:50:35,883 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 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 17:50:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:36,303 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-07-21 17:50:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:50:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 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 48 [2022-07-21 17:50:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:36,308 INFO L225 Difference]: With dead ends: 135 [2022-07-21 17:50:36,308 INFO L226 Difference]: Without dead ends: 135 [2022-07-21 17:50:36,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:50:36,309 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 215 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:36,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 287 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:50:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-21 17:50:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 90. [2022-07-21 17:50:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.25) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-07-21 17:50:36,320 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 48 [2022-07-21 17:50:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:36,320 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-07-21 17:50:36,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 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 17:50:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-07-21 17:50:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:50:36,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:36,321 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:36,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-21 17:50:36,528 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 17:50:36,529 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1114427801, now seen corresponding path program 1 times [2022-07-21 17:50:36,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:36,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853210376] [2022-07-21 17:50:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:36,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:36,531 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 17:50:36,532 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 17:50:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:36,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:50:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:36,763 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 17:50:36,776 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 16 treesize of output 8 [2022-07-21 17:50:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 17:50:36,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:50:36,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:36,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853210376] [2022-07-21 17:50:36,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853210376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:50:36,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:50:36,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:50:36,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943318034] [2022-07-21 17:50:36,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:50:36,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:50:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:50:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:50:36,797 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 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 17:50:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:37,064 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2022-07-21 17:50:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:50:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 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 49 [2022-07-21 17:50:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:37,065 INFO L225 Difference]: With dead ends: 118 [2022-07-21 17:50:37,065 INFO L226 Difference]: Without dead ends: 118 [2022-07-21 17:50:37,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:50:37,066 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 147 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:37,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 445 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:50:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-21 17:50:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-07-21 17:50:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-07-21 17:50:37,068 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 49 [2022-07-21 17:50:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:37,068 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-07-21 17:50:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 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 17:50:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-07-21 17:50:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:50:37,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:37,068 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:37,079 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 17:50:37,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:50:37,269 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1553828739, now seen corresponding path program 1 times [2022-07-21 17:50:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590466585] [2022-07-21 17:50:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:37,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:37,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:37,271 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:50:37,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:50:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:37,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 17:50:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:37,531 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 17:50:37,572 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 17:50:37,690 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:50:37,690 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 18 treesize of output 25 [2022-07-21 17:50:38,060 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:50:38,061 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-21 17:50:38,100 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-21 17:50:38,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 42 [2022-07-21 17:50:38,295 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 13 treesize of output 9 [2022-07-21 17:50:38,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:50:38,761 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:50:38,762 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 89 treesize of output 53 [2022-07-21 17:50:38,778 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:50:38,779 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:50:38,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-21 17:50:38,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 17:50:39,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:39,148 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:50:39,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 77 [2022-07-21 17:50:39,191 INFO L356 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-07-21 17:50:39,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 46 [2022-07-21 17:50:39,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:39,217 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:50:39,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:50:39,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 17:50:39,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:50:39,907 INFO L356 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2022-07-21 17:50:39,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 64 [2022-07-21 17:50:39,937 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-21 17:50:39,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-07-21 17:50:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:50:40,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:41,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:41,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590466585] [2022-07-21 17:50:41,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590466585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:41,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [757631148] [2022-07-21 17:50:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:41,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:50:41,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:50:41,168 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:50:41,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-07-21 17:50:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:41,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 17:50:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:41,691 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 17:50:41,697 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 17:50:42,627 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:50:42,627 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 17:50:42,652 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:50:42,652 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 21 treesize of output 28 [2022-07-21 17:50:42,999 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:50:43,012 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 13 treesize of output 9 [2022-07-21 17:50:43,858 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:50:43,858 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 71 treesize of output 38 [2022-07-21 17:50:43,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-21 17:50:43,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 17:50:43,878 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:50:43,878 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:50:44,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:44,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 17:50:44,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:44,555 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:50:44,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 67 [2022-07-21 17:50:44,579 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-21 17:50:44,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2022-07-21 17:50:44,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:44,598 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:50:44,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-21 17:50:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:45,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:50:45,341 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:50:45,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2022-07-21 17:50:45,357 INFO L356 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-07-21 17:50:45,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-07-21 17:50:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:50:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:46,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [757631148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:46,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:50:46,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2022-07-21 17:50:46,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998609575] [2022-07-21 17:50:46,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:50:46,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 17:50:46,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 17:50:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=3284, Unknown=34, NotChecked=0, Total=3540 [2022-07-21 17:50:46,149 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 53 states, 50 states have (on average 1.72) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:50:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:48,970 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-07-21 17:50:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:50:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.72) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-07-21 17:50:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:48,971 INFO L225 Difference]: With dead ends: 96 [2022-07-21 17:50:48,971 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 17:50:48,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=403, Invalid=5563, Unknown=40, NotChecked=0, Total=6006 [2022-07-21 17:50:48,973 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:48,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 878 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 342 Invalid, 0 Unknown, 369 Unchecked, 0.5s Time] [2022-07-21 17:50:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 17:50:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-07-21 17:50:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.25) internal successors, (95), 87 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2022-07-21 17:50:48,975 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 49 [2022-07-21 17:50:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:48,975 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2022-07-21 17:50:48,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.72) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:50:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2022-07-21 17:50:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:50:48,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:48,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:48,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:49,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:49,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:50:49,383 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1553828740, now seen corresponding path program 1 times [2022-07-21 17:50:49,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:49,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838174150] [2022-07-21 17:50:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:49,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:49,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:49,385 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:50:49,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 17:50:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 17:50:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:49,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:49,662 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 17:50:49,777 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:50:49,777 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 18 treesize of output 25 [2022-07-21 17:50:50,032 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-21 17:50:50,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 42 [2022-07-21 17:50:50,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:50:50,511 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:50:50,511 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 61 treesize of output 37 [2022-07-21 17:50:50,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-07-21 17:50:50,523 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 7 treesize of output 3 [2022-07-21 17:50:50,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:50,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:50:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:50,848 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:50:50,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 57 [2022-07-21 17:50:50,908 INFO L356 Elim1Store]: treesize reduction 81, result has 43.0 percent of original size [2022-07-21 17:50:50,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 83 [2022-07-21 17:50:51,160 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 17:50:51,575 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:50:51,576 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 94 treesize of output 50 [2022-07-21 17:50:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:50:51,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:52,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:52,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838174150] [2022-07-21 17:50:52,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838174150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:52,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [510653612] [2022-07-21 17:50:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:52,374 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:50:52,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:50:52,375 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:50:52,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-21 17:50:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 17:50:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:52,812 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 17:50:53,381 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:50:53,382 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 21 treesize of output 28 [2022-07-21 17:50:53,616 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 13 treesize of output 9 [2022-07-21 17:50:54,206 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:50:54,206 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 42 treesize of output 21 [2022-07-21 17:50:54,212 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 7 treesize of output 3 [2022-07-21 17:50:54,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:54,705 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:50:54,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-07-21 17:50:54,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:54,716 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 14 treesize of output 16 [2022-07-21 17:50:54,749 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-21 17:50:54,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 67 [2022-07-21 17:50:55,159 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 17:50:55,576 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:50:55,577 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 76 treesize of output 35 [2022-07-21 17:50:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:50:56,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:56,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [510653612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:56,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:50:56,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 51 [2022-07-21 17:50:56,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210648218] [2022-07-21 17:50:56,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:50:56,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 17:50:56,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:50:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 17:50:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3159, Unknown=19, NotChecked=0, Total=3422 [2022-07-21 17:50:56,756 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 52 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:50:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:50:58,654 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-07-21 17:50:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:50:58,655 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-07-21 17:50:58,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:50:58,656 INFO L225 Difference]: With dead ends: 96 [2022-07-21 17:50:58,656 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 17:50:58,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=426, Invalid=5401, Unknown=25, NotChecked=0, Total=5852 [2022-07-21 17:50:58,657 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 36 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:50:58,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 751 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 249 Invalid, 0 Unknown, 288 Unchecked, 0.3s Time] [2022-07-21 17:50:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 17:50:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-07-21 17:50:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.236842105263158) internal successors, (94), 87 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:50:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-07-21 17:50:58,661 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 49 [2022-07-21 17:50:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:50:58,662 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-07-21 17:50:58,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:50:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-07-21 17:50:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:50:58,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:50:58,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:50:58,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-07-21 17:50:58,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:50:59,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:50:59,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:50:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:50:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash 218878957, now seen corresponding path program 1 times [2022-07-21 17:50:59,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:50:59,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549742380] [2022-07-21 17:50:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:59,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:50:59,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:50:59,074 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:50:59,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 17:50:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:50:59,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:50:59,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:50:59,514 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 8 treesize of output 4 [2022-07-21 17:50:59,585 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1604 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1604) |c_#memory_$Pointer$.base|))) is different from true [2022-07-21 17:50:59,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:50:59,637 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 15 treesize of output 17 [2022-07-21 17:50:59,679 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 16 treesize of output 8 [2022-07-21 17:50:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-07-21 17:50:59,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:50:59,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:50:59,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549742380] [2022-07-21 17:50:59,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549742380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:50:59,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1968882936] [2022-07-21 17:50:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:50:59,803 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:50:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:50:59,805 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:50:59,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-21 17:51:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:51:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:51:00,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:51:00,441 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 8 treesize of output 4 [2022-07-21 17:51:00,464 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1672 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1672) |c_#memory_$Pointer$.base|)) (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2022-07-21 17:51:00,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:00,512 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 15 treesize of output 17 [2022-07-21 17:51:00,575 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 16 treesize of output 8 [2022-07-21 17:51:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-07-21 17:51:00,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:51:00,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1968882936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:51:00,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:51:00,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2022-07-21 17:51:00,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952810292] [2022-07-21 17:51:00,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:51:00,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:51:00,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:51:00,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:51:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=504, Unknown=10, NotChecked=94, Total=702 [2022-07-21 17:51:00,664 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 25 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:51:00,777 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1672 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1672) |c_#memory_$Pointer$.base|)) (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1604 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1604) |c_#memory_$Pointer$.base|)) (not (= (_ bv0 32) |c_node_create_~temp~0#1.base|))) is different from true [2022-07-21 17:51:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:51:01,157 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-07-21 17:51:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:51:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2022-07-21 17:51:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:51:01,159 INFO L225 Difference]: With dead ends: 86 [2022-07-21 17:51:01,159 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 17:51:01,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=777, Unknown=15, NotChecked=180, Total=1122 [2022-07-21 17:51:01,160 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 22 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:51:01,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 501 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-07-21 17:51:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 17:51:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-21 17:51:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.25) internal successors, (85), 79 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:51:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2022-07-21 17:51:01,162 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 52 [2022-07-21 17:51:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:51:01,162 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2022-07-21 17:51:01,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:51:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2022-07-21 17:51:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:51:01,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:51:01,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:51:01,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-21 17:51:01,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-07-21 17:51:01,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:51:01,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:51:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:51:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash -521057353, now seen corresponding path program 1 times [2022-07-21 17:51:01,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:51:01,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959136585] [2022-07-21 17:51:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:51:01,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:51:01,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:51:01,577 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:51:01,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 17:51:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:51:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 17:51:01,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:51:02,045 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 13 treesize of output 9 [2022-07-21 17:51:02,216 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 7 treesize of output 3 [2022-07-21 17:51:02,226 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:51:02,226 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 12 treesize of output 20 [2022-07-21 17:51:02,317 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (exists ((v_ArrVal_1742 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1742) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1743 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_1743))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2022-07-21 17:51:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:02,391 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 14 treesize of output 16 [2022-07-21 17:51:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:02,422 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-21 17:51:02,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 31 [2022-07-21 17:51:02,637 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 17:51:02,950 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:51:02,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 33 [2022-07-21 17:51:03,017 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 24 treesize of output 12 [2022-07-21 17:51:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-07-21 17:51:03,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:51:03,258 INFO L356 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-07-21 17:51:03,259 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 19 treesize of output 18 [2022-07-21 17:51:03,264 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1746 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_append_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1746) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2022-07-21 17:51:03,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:51:03,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959136585] [2022-07-21 17:51:03,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959136585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:51:03,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826821761] [2022-07-21 17:51:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:51:03,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:51:03,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:51:03,784 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:51:03,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-21 17:51:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:51:04,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 17:51:04,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:51:04,793 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 7 treesize of output 3 [2022-07-21 17:51:04,951 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1817 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_1817))) (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2022-07-21 17:51:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:05,075 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 14 treesize of output 16 [2022-07-21 17:51:05,214 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 17:51:05,529 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-07-21 17:51:05,628 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 17:51:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-07-21 17:51:05,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:51:08,512 INFO L356 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2022-07-21 17:51:08,512 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 26 treesize of output 25 [2022-07-21 17:51:08,816 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:51:08,816 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2022-07-21 17:51:09,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826821761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:51:09,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:51:09,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21] total 45 [2022-07-21 17:51:09,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447621807] [2022-07-21 17:51:09,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:51:09,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 17:51:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:51:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 17:51:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2765, Unknown=27, NotChecked=324, Total=3306 [2022-07-21 17:51:09,253 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 46 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:51:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:51:11,506 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-07-21 17:51:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:51:11,506 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2022-07-21 17:51:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:51:11,507 INFO L225 Difference]: With dead ends: 93 [2022-07-21 17:51:11,507 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 17:51:11,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=391, Invalid=4992, Unknown=31, NotChecked=438, Total=5852 [2022-07-21 17:51:11,508 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:51:11,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 800 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 187 Invalid, 0 Unknown, 394 Unchecked, 0.3s Time] [2022-07-21 17:51:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 17:51:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-07-21 17:51:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:51:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2022-07-21 17:51:11,511 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 52 [2022-07-21 17:51:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:51:11,513 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2022-07-21 17:51:11,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:51:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2022-07-21 17:51:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:51:11,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:51:11,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:51:11,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-21 17:51:11,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-07-21 17:51:11,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:51:11,925 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:51:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:51:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash -521057352, now seen corresponding path program 1 times [2022-07-21 17:51:11,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:51:11,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290650695] [2022-07-21 17:51:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:51:11,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:51:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:51:11,927 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:51:11,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 17:51:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:51:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 17:51:12,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:51:12,527 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 13 treesize of output 9 [2022-07-21 17:51:12,785 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 7 treesize of output 3 [2022-07-21 17:51:12,810 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:51:12,810 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 12 treesize of output 20 [2022-07-21 17:51:12,940 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1890 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1890))) (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (exists ((v_ArrVal_1889 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_1889) |c_#memory_$Pointer$.offset|)) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2022-07-21 17:51:13,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:13,044 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 14 treesize of output 16 [2022-07-21 17:51:13,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:13,083 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-21 17:51:13,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 31 [2022-07-21 17:51:13,872 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:51:13,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 53 [2022-07-21 17:51:13,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:13,881 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 44 treesize of output 42 [2022-07-21 17:51:13,887 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 11 treesize of output 3 [2022-07-21 17:51:14,007 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 30 treesize of output 18 [2022-07-21 17:51:14,011 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 26 treesize of output 14 [2022-07-21 17:51:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-07-21 17:51:14,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:51:14,693 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1893 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1893) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_1893 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1894 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1893) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1894) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-07-21 17:51:15,000 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:51:15,000 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 52 treesize of output 56 [2022-07-21 17:51:17,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:51:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290650695] [2022-07-21 17:51:17,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290650695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:51:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1240089409] [2022-07-21 17:51:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:51:17,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:51:17,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:51:17,066 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:51:17,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-21 17:51:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:51:17,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 17:51:17,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:51:17,504 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 17:51:17,610 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 17:51:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:17,913 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 17:51:18,123 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 17:51:18,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:18,691 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 17:51:19,696 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 17:51:19,711 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 7 treesize of output 3 [2022-07-21 17:51:20,102 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1969 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_1969))) (exists ((v_ArrVal_1968 (_ BitVec 32))) (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| v_ArrVal_1968) |c_#length|)) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2022-07-21 17:51:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:20,365 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 14 treesize of output 16 [2022-07-21 17:51:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:20,378 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 17:51:21,155 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:51:21,155 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 36 treesize of output 37 [2022-07-21 17:51:21,171 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:51:21,171 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 17:51:21,432 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 23 treesize of output 15 [2022-07-21 17:51:21,436 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 26 treesize of output 14 [2022-07-21 17:51:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 17:51:21,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:51:22,557 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:51:22,557 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-07-21 17:51:22,564 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 16 treesize of output 14 [2022-07-21 17:51:22,665 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 16 treesize of output 14 [2022-07-21 17:51:23,176 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 16 treesize of output 14 [2022-07-21 17:51:23,297 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 16 treesize of output 14 [2022-07-21 17:51:23,486 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 16 treesize of output 14 [2022-07-21 17:51:23,834 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 9 treesize of output 7 [2022-07-21 17:51:23,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 17:51:24,030 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 9 treesize of output 7 [2022-07-21 17:51:24,118 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 16 treesize of output 14 [2022-07-21 17:51:24,836 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 16 treesize of output 14 [2022-07-21 17:51:24,943 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 16 treesize of output 14 [2022-07-21 17:51:25,499 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 16 treesize of output 14 [2022-07-21 17:51:25,646 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 16 treesize of output 14 [2022-07-21 17:51:25,828 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 16 treesize of output 14 [2022-07-21 17:51:26,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 17:51:26,399 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 9 treesize of output 7 [2022-07-21 17:51:26,528 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 9 treesize of output 7 [2022-07-21 17:51:26,630 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 16 treesize of output 14 [2022-07-21 17:51:26,867 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 16 treesize of output 14 [2022-07-21 17:51:26,979 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 16 treesize of output 14 [2022-07-21 17:51:27,576 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 16 treesize of output 14 [2022-07-21 17:51:27,712 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 16 treesize of output 14 [2022-07-21 17:51:27,885 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 16 treesize of output 14 [2022-07-21 17:51:28,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 17:51:28,447 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 9 treesize of output 7 [2022-07-21 17:51:28,525 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 9 treesize of output 7 [2022-07-21 17:51:28,629 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 16 treesize of output 14 [2022-07-21 17:51:28,843 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 16 treesize of output 14 [2022-07-21 17:51:28,948 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 16 treesize of output 14 [2022-07-21 17:51:29,520 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 16 treesize of output 14 [2022-07-21 17:51:29,653 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 16 treesize of output 14 [2022-07-21 17:51:29,823 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 16 treesize of output 14 [2022-07-21 17:51:30,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 17:51:30,258 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 9 treesize of output 7 [2022-07-21 17:51:30,545 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 9 treesize of output 7 [2022-07-21 17:51:30,612 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 16 treesize of output 14 [2022-07-21 17:51:30,939 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 22 treesize of output 20 [2022-07-21 17:51:31,608 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 22 treesize of output 20 [2022-07-21 17:51:31,748 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 22 treesize of output 20 [2022-07-21 17:51:31,902 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 22 treesize of output 20 [2022-07-21 17:51:32,118 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 22 treesize of output 20 [2022-07-21 17:51:32,233 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 22 treesize of output 20 [2022-07-21 17:51:32,351 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 22 treesize of output 20 [2022-07-21 17:51:32,584 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 22 treesize of output 20 [2022-07-21 17:51:32,726 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 22 treesize of output 20 [2022-07-21 17:51:32,889 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 22 treesize of output 20 [2022-07-21 17:51:33,555 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 22 treesize of output 20 [2022-07-21 17:51:33,695 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 22 treesize of output 20 [2022-07-21 17:51:33,871 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 22 treesize of output 20 [2022-07-21 17:51:34,136 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 22 treesize of output 20 [2022-07-21 17:51:34,278 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 22 treesize of output 20 [2022-07-21 17:51:34,392 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 22 treesize of output 20 [2022-07-21 17:51:34,617 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 22 treesize of output 20 [2022-07-21 17:51:34,761 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 22 treesize of output 20 [2022-07-21 17:51:34,869 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 22 treesize of output 20 [2022-07-21 17:51:35,542 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 12 treesize of output 10 [2022-07-21 17:51:36,265 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 22 treesize of output 20 [2022-07-21 17:51:36,449 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 22 treesize of output 20 [2022-07-21 17:51:36,608 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 22 treesize of output 20 [2022-07-21 17:51:36,887 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 22 treesize of output 20 [2022-07-21 17:51:37,023 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 22 treesize of output 20 [2022-07-21 17:51:37,200 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 22 treesize of output 20 [2022-07-21 17:51:37,397 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 22 treesize of output 20 [2022-07-21 17:51:37,495 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 22 treesize of output 20 [2022-07-21 17:51:37,586 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 22 treesize of output 20 [2022-07-21 17:51:38,468 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 22 treesize of output 20 [2022-07-21 17:51:38,598 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 22 treesize of output 20 [2022-07-21 17:51:38,702 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 22 treesize of output 20 [2022-07-21 17:51:41,017 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 12 treesize of output 10 [2022-07-21 17:51:41,703 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 12 treesize of output 10 [2022-07-21 17:51:43,565 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 22 treesize of output 20 [2022-07-21 17:51:43,749 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 22 treesize of output 20 [2022-07-21 17:51:44,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1240089409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:51:44,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:51:44,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 50 [2022-07-21 17:51:44,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473187816] [2022-07-21 17:51:44,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:51:44,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 17:51:44,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:51:44,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 17:51:44,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3368, Unknown=83, NotChecked=360, Total=4032 [2022-07-21 17:51:44,676 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:51:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:51:49,853 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2022-07-21 17:51:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 17:51:49,855 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2022-07-21 17:51:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:51:49,856 INFO L225 Difference]: With dead ends: 93 [2022-07-21 17:51:49,856 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 17:51:49,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=492, Invalid=7066, Unknown=110, NotChecked=522, Total=8190 [2022-07-21 17:51:49,858 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 42 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:51:49,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1017 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 336 Invalid, 0 Unknown, 481 Unchecked, 0.6s Time] [2022-07-21 17:51:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 17:51:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-07-21 17:51:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:51:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2022-07-21 17:51:49,860 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 52 [2022-07-21 17:51:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:51:49,860 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2022-07-21 17:51:49,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:51:49,861 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2022-07-21 17:51:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 17:51:49,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:51:49,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:51:49,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:51:50,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:51:50,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:51:50,272 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:51:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:51:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1027089942, now seen corresponding path program 1 times [2022-07-21 17:51:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:51:50,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865546368] [2022-07-21 17:51:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:51:50,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:51:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:51:50,274 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:51:50,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 17:51:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:51:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:51:50,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:51:50,938 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 6 treesize of output 5 [2022-07-21 17:51:50,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:51:51,255 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:51:51,256 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 21 treesize of output 24 [2022-07-21 17:51:51,262 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 7 treesize of output 3 [2022-07-21 17:51:51,424 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2046 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_2046))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2045 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_2045))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2022-07-21 17:51:51,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:51,549 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 14 treesize of output 16 [2022-07-21 17:51:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:51,594 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-21 17:51:51,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-07-21 17:51:51,914 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 17:51:52,369 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:51:52,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 32 [2022-07-21 17:51:52,484 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 23 treesize of output 11 [2022-07-21 17:51:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-07-21 17:51:52,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:51:52,796 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2049 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2049) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))) is different from false [2022-07-21 17:51:53,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:51:53,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865546368] [2022-07-21 17:51:53,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865546368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:51:53,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1455076327] [2022-07-21 17:51:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:51:53,510 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:51:53,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:51:53,511 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:51:53,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-07-21 17:51:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:51:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 17:51:53,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:51:54,837 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 7 treesize of output 3 [2022-07-21 17:51:55,135 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (exists ((v_ArrVal_2120 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_2120) |c_#memory_$Pointer$.offset|)) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2022-07-21 17:51:55,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:51:55,311 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 14 treesize of output 16 [2022-07-21 17:51:55,832 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 17:51:56,200 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-07-21 17:51:56,346 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 16 treesize of output 8 [2022-07-21 17:51:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-07-21 17:51:56,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:51:57,218 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:51:57,219 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 61 [2022-07-21 17:51:57,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1455076327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:51:57,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:51:57,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 49 [2022-07-21 17:51:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589033096] [2022-07-21 17:51:57,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:51:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:51:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:51:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:51:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3180, Unknown=27, NotChecked=348, Total=3782 [2022-07-21 17:51:57,770 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 49 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 44 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:52:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:52:01,048 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2022-07-21 17:52:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 17:52:01,049 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 44 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2022-07-21 17:52:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:52:01,049 INFO L225 Difference]: With dead ends: 93 [2022-07-21 17:52:01,049 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 17:52:01,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=453, Invalid=5690, Unknown=31, NotChecked=468, Total=6642 [2022-07-21 17:52:01,052 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:52:01,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1132 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 377 Invalid, 0 Unknown, 295 Unchecked, 0.8s Time] [2022-07-21 17:52:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 17:52:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-07-21 17:52:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:52:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-07-21 17:52:01,055 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 53 [2022-07-21 17:52:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:52:01,055 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-07-21 17:52:01,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 44 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:52:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-07-21 17:52:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 17:52:01,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:52:01,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:52:01,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-07-21 17:52:01,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 17:52:01,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:52:01,466 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:52:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:52:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1947817869, now seen corresponding path program 2 times [2022-07-21 17:52:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:52:01,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380634216] [2022-07-21 17:52:01,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:52:01,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:52:01,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:52:01,468 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:52:01,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-21 17:52:01,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:52:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:52:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-21 17:52:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:52:01,844 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 17:52:02,040 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:52:02,053 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:52:02,472 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:52:02,472 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-21 17:52:02,480 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 7 treesize of output 3 [2022-07-21 17:52:02,514 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:52:02,515 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-21 17:52:02,519 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 7 treesize of output 3 [2022-07-21 17:52:02,560 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:52:02,560 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 21 treesize of output 28 [2022-07-21 17:52:02,739 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 21 treesize of output 20 [2022-07-21 17:52:02,743 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 27 treesize of output 26 [2022-07-21 17:52:03,262 INFO L356 Elim1Store]: treesize reduction 11, result has 66.7 percent of original size [2022-07-21 17:52:03,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 65 [2022-07-21 17:52:03,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 17:52:03,282 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-21 17:52:03,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2022-07-21 17:52:03,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:03,626 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-21 17:52:03,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 82 [2022-07-21 17:52:03,653 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-21 17:52:03,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 37 [2022-07-21 17:52:03,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:03,696 INFO L356 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-07-21 17:52:03,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2022-07-21 17:52:04,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:52:04,932 INFO L356 Elim1Store]: treesize reduction 82, result has 29.3 percent of original size [2022-07-21 17:52:04,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 109 [2022-07-21 17:52:04,977 INFO L356 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-07-21 17:52:04,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 40 [2022-07-21 17:52:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:52:05,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:52:06,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:52:06,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380634216] [2022-07-21 17:52:06,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380634216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:52:06,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901820115] [2022-07-21 17:52:06,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:52:06,027 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:52:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:52:06,028 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:52:06,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-21 17:52:06,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:52:06,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:52:06,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 17:52:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:52:06,691 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 17:52:07,125 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:52:07,138 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:52:07,794 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:52:07,794 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-21 17:52:07,808 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 7 treesize of output 3 [2022-07-21 17:52:07,864 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:52:07,865 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 21 treesize of output 28 [2022-07-21 17:52:07,890 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 16 treesize of output 18 [2022-07-21 17:52:08,486 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 21 treesize of output 20 [2022-07-21 17:52:08,494 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 27 treesize of output 26 [2022-07-21 17:52:09,752 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:52:09,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 46 [2022-07-21 17:52:09,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-21 17:52:09,779 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:09,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2022-07-21 17:52:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:10,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:10,139 INFO L356 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-07-21 17:52:10,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2022-07-21 17:52:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:10,193 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-21 17:52:10,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 94 treesize of output 84 [2022-07-21 17:52:10,236 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-21 17:52:10,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2022-07-21 17:52:12,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:52:12,475 INFO L356 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2022-07-21 17:52:12,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 82 [2022-07-21 17:52:12,505 INFO L356 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-07-21 17:52:12,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 29 [2022-07-21 17:52:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:52:12,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:52:12,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [901820115] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:52:12,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:52:12,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2022-07-21 17:52:12,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751799867] [2022-07-21 17:52:12,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:52:12,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 17:52:12,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:52:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 17:52:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2366, Unknown=8, NotChecked=0, Total=2550 [2022-07-21 17:52:12,828 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 45 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 39 states have internal predecessors, (71), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:52:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:52:13,663 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2022-07-21 17:52:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:52:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 39 states have internal predecessors, (71), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-07-21 17:52:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:52:13,665 INFO L225 Difference]: With dead ends: 128 [2022-07-21 17:52:13,665 INFO L226 Difference]: Without dead ends: 128 [2022-07-21 17:52:13,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=211, Invalid=2856, Unknown=13, NotChecked=0, Total=3080 [2022-07-21 17:52:13,666 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:52:13,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1032 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 391 Unchecked, 0.3s Time] [2022-07-21 17:52:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-21 17:52:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-07-21 17:52:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 115 states have internal predecessors, (123), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:52:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 133 transitions. [2022-07-21 17:52:13,668 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 133 transitions. Word has length 53 [2022-07-21 17:52:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:52:13,669 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 133 transitions. [2022-07-21 17:52:13,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 39 states have internal predecessors, (71), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:52:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 133 transitions. [2022-07-21 17:52:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:52:13,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:52:13,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:52:13,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-21 17:52:13,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-07-21 17:52:14,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:52:14,076 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:52:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:52:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1775059065, now seen corresponding path program 1 times [2022-07-21 17:52:14,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:52:14,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268736706] [2022-07-21 17:52:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:52:14,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:52:14,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:52:14,084 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:52:14,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-21 17:52:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:52:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 17:52:14,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:52:14,769 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 13 treesize of output 9 [2022-07-21 17:52:14,785 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:52:15,064 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 7 treesize of output 3 [2022-07-21 17:52:15,077 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:15,077 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 12 treesize of output 20 [2022-07-21 17:52:15,215 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2357 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_2357) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_2358 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_2358) |c_#memory_$Pointer$.offset|)) (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2022-07-21 17:52:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:15,363 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-21 17:52:15,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 31 [2022-07-21 17:52:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:15,376 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 14 treesize of output 16 [2022-07-21 17:52:15,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:52:15,812 INFO L356 Elim1Store]: treesize reduction 17, result has 56.4 percent of original size [2022-07-21 17:52:15,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 44 [2022-07-21 17:52:16,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:16,080 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 14 treesize of output 16 [2022-07-21 17:52:16,160 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 17:52:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-07-21 17:52:16,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:52:16,430 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 22 treesize of output 18 [2022-07-21 17:52:16,816 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2361 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2361) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_2361 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2361) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) is different from false [2022-07-21 17:52:18,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:52:18,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268736706] [2022-07-21 17:52:18,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268736706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:52:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1503707512] [2022-07-21 17:52:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:52:18,694 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:52:18,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:52:18,696 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:52:18,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-07-21 17:52:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:52:19,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 17:52:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:52:19,183 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 17:52:19,332 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 17:52:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:19,622 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 17:52:19,809 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 17:52:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:20,326 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 17:52:21,350 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 7 treesize of output 3 [2022-07-21 17:52:21,355 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 17:52:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:22,261 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 17:52:22,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:22,274 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 14 treesize of output 16 [2022-07-21 17:52:22,551 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 7 treesize of output 3 [2022-07-21 17:52:22,971 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:52:22,971 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-07-21 17:52:23,195 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 26 treesize of output 14 [2022-07-21 17:52:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:52:23,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:52:25,822 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 63 treesize of output 47 [2022-07-21 17:52:27,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1503707512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:52:27,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:52:27,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2022-07-21 17:52:27,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030213695] [2022-07-21 17:52:27,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:52:27,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 17:52:27,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:52:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 17:52:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=4193, Unknown=84, NotChecked=266, Total=4830 [2022-07-21 17:52:27,145 INFO L87 Difference]: Start difference. First operand 126 states and 133 transitions. Second operand has 53 states, 50 states have (on average 1.9) internal successors, (95), 45 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:52:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:52:31,796 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2022-07-21 17:52:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:52:31,797 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.9) internal successors, (95), 45 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2022-07-21 17:52:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:52:31,797 INFO L225 Difference]: With dead ends: 130 [2022-07-21 17:52:31,797 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 17:52:31,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=553, Invalid=7715, Unknown=112, NotChecked=362, Total=8742 [2022-07-21 17:52:31,798 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 67 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:52:31,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 704 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 232 Invalid, 0 Unknown, 329 Unchecked, 0.4s Time] [2022-07-21 17:52:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 17:52:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2022-07-21 17:52:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 106 states have (on average 1.179245283018868) internal successors, (125), 117 states have internal predecessors, (125), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:52:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-07-21 17:52:31,800 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 54 [2022-07-21 17:52:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:52:31,801 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-07-21 17:52:31,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.9) internal successors, (95), 45 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:52:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-07-21 17:52:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:52:31,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:52:31,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:52:31,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-07-21 17:52:32,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-21 17:52:32,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:52:32,202 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:52:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:52:32,202 INFO L85 PathProgramCache]: Analyzing trace with hash 729745886, now seen corresponding path program 1 times [2022-07-21 17:52:32,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:52:32,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306550344] [2022-07-21 17:52:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:52:32,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:52:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:52:32,206 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:52:32,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-21 17:52:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:52:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 17:52:32,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:52:32,733 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 17:52:32,890 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 13 treesize of output 9 [2022-07-21 17:52:33,125 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:33,125 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 25 treesize of output 28 [2022-07-21 17:52:33,131 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 8 treesize of output 6 [2022-07-21 17:52:33,137 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 7 treesize of output 3 [2022-07-21 17:52:33,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:33,435 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 14 treesize of output 16 [2022-07-21 17:52:33,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:33,459 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-21 17:52:33,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-07-21 17:52:33,477 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 17:52:33,477 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 19 treesize of output 19 [2022-07-21 17:52:33,623 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 17:52:33,775 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:33,775 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 32 treesize of output 27 [2022-07-21 17:52:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:52:33,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:52:34,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:52:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306550344] [2022-07-21 17:52:34,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306550344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:52:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1905700271] [2022-07-21 17:52:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:52:34,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:52:34,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:52:34,191 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:52:34,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-07-21 17:52:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:52:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 17:52:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:52:34,829 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 17:52:34,949 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:52:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:35,419 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 21 treesize of output 20 [2022-07-21 17:52:35,930 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 31 treesize of output 19 [2022-07-21 17:52:35,936 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 7 treesize of output 3 [2022-07-21 17:52:35,941 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 8 treesize of output 6 [2022-07-21 17:52:35,947 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 7 treesize of output 3 [2022-07-21 17:52:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:36,661 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 37 treesize of output 35 [2022-07-21 17:52:36,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:36,672 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 17:52:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:36,685 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 14 treesize of output 16 [2022-07-21 17:52:36,706 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 17:52:36,707 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 19 treesize of output 19 [2022-07-21 17:52:37,453 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:52:37,454 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 72 treesize of output 65 [2022-07-21 17:52:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:37,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2022-07-21 17:52:37,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:37,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:52:37,636 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 34 treesize of output 18 [2022-07-21 17:52:37,640 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 17:52:37,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:52:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:52:38,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:52:38,323 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2596 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2599 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2597 (_ BitVec 32))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|) v_ArrVal_2597)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2596) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2599) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2022-07-21 17:52:38,354 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2596 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2599 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2597 (_ BitVec 32))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_#t~mem9#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_#t~mem9#1.offset|) v_ArrVal_2597)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base| v_ArrVal_2596) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem9#1.base| v_ArrVal_2599) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2022-07-21 17:52:38,375 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2596 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2599 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2597 (_ BitVec 32))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (select (select (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) (_ bv4 32)) v_ArrVal_2597)) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2596) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2599) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-07-21 17:52:39,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1905700271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:52:39,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:52:39,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 45 [2022-07-21 17:52:39,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740262913] [2022-07-21 17:52:39,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:52:39,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 17:52:39,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:52:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 17:52:39,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2650, Unknown=39, NotChecked=318, Total=3192 [2022-07-21 17:52:39,374 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 45 states, 43 states have (on average 2.255813953488372) internal successors, (97), 40 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:52:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:52:43,424 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2022-07-21 17:52:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 17:52:43,425 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.255813953488372) internal successors, (97), 40 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2022-07-21 17:52:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:52:43,425 INFO L225 Difference]: With dead ends: 120 [2022-07-21 17:52:43,425 INFO L226 Difference]: Without dead ends: 120 [2022-07-21 17:52:43,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=402, Invalid=5102, Unknown=58, NotChecked=444, Total=6006 [2022-07-21 17:52:43,426 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 41 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:52:43,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 703 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 425 Invalid, 0 Unknown, 302 Unchecked, 0.8s Time] [2022-07-21 17:52:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-21 17:52:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-21 17:52:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 109 states have internal predecessors, (115), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:52:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-07-21 17:52:43,428 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 56 [2022-07-21 17:52:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:52:43,428 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-07-21 17:52:43,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.255813953488372) internal successors, (97), 40 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:52:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-07-21 17:52:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:52:43,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:52:43,429 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:52:43,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-07-21 17:52:43,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-07-21 17:52:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:52:43,829 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-21 17:52:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:52:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash 294390785, now seen corresponding path program 1 times [2022-07-21 17:52:43,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:52:43,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901185080] [2022-07-21 17:52:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:52:43,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:52:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:52:43,832 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:52:43,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-21 17:52:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:52:44,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 17:52:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:52:44,153 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 17:52:44,166 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 17:52:44,193 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 17:52:44,197 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 17:52:44,323 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:52:44,324 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 12 treesize of output 12 [2022-07-21 17:52:44,331 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 17:52:44,531 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 17:52:44,735 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:52:44,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-21 17:52:44,910 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 13 treesize of output 9 [2022-07-21 17:52:44,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:52:45,435 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:45,436 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 45 treesize of output 28 [2022-07-21 17:52:45,442 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:45,442 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-07-21 17:52:45,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 17:52:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:45,897 INFO L356 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2022-07-21 17:52:45,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 38 [2022-07-21 17:52:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:45,935 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-21 17:52:45,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 61 [2022-07-21 17:52:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:45,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 17:52:46,065 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 17:52:48,122 INFO L356 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-07-21 17:52:48,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 39 [2022-07-21 17:52:49,695 INFO L356 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2022-07-21 17:52:49,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 106 [2022-07-21 17:52:49,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:49,728 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:49,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-07-21 17:52:49,948 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:49,948 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 53 treesize of output 57 [2022-07-21 17:52:50,299 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:50,299 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 70 treesize of output 37 [2022-07-21 17:52:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:52:50,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:52:52,043 INFO L356 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-07-21 17:52:52,043 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 17:52:53,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:52:53,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901185080] [2022-07-21 17:52:53,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901185080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:52:53,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [239633616] [2022-07-21 17:52:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:52:53,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:52:53,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:52:53,590 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:52:53,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-07-21 17:52:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:52:54,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:52:54,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:52:54,079 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 17:52:54,273 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 17:52:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:54,569 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 17:52:54,858 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 17:52:55,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:52:55,606 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 17:52:56,149 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 17:52:56,164 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 17:52:56,794 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:52:56,795 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 17:52:59,068 INFO L356 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2022-07-21 17:52:59,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 56 [2022-07-21 17:52:59,091 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:52:59,091 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 13 treesize of output 17 [2022-07-21 17:53:04,377 INFO L356 Elim1Store]: treesize reduction 210, result has 41.5 percent of original size [2022-07-21 17:53:04,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 179 treesize of output 241 [2022-07-21 17:53:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:53:54,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:54:12,404 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:54:12,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 87 [2022-07-21 17:54:18,678 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:54:18,679 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 36 treesize of output 35 [2022-07-21 17:54:19,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [239633616] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:54:19,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:54:19,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21] total 51 [2022-07-21 17:54:19,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52100931] [2022-07-21 17:54:19,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:54:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 17:54:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:54:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 17:54:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4734, Unknown=21, NotChecked=0, Total=4970 [2022-07-21 17:54:19,260 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 52 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 44 states have internal predecessors, (96), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)