./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2c_prepend_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 f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:04:41,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:04:41,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:04:41,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:04:41,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:04:41,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:04:41,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:04:41,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:04:41,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:04:41,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:04:41,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:04:41,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:04:41,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:04:41,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:04:41,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:04:41,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:04:41,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:04:41,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:04:41,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:04:41,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:04:41,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:04:41,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:04:41,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:04:41,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:04:41,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:04:41,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:04:41,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:04:41,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:04:41,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:04:41,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:04:41,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:04:41,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:04:41,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:04:41,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:04:41,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:04:41,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:04:41,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:04:41,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:04:41,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:04:41,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:04:41,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:04:41,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 06:04:41,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:04:41,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:04:41,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:04:41,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:04:41,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:04:41,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:04:41,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:04:41,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:04:41,389 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:04:41,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:04:41,390 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:04:41,390 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:04:41,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:04:41,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:04:41,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:04:41,391 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:04:41,391 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:04:41,391 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:04:41,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:04:41,391 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:04:41,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:04:41,392 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:04:41,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:04:41,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:04:41,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:04:41,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:04:41,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:04:41,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:04:41,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 06:04:41,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 06:04:41,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:04:41,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 [2021-12-16 06:04:41,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:04:41,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:04:41,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:04:41,610 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:04:41,610 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:04:41,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2021-12-16 06:04:41,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d2dca60/43ae0ff82a92447c8659465e251482d4/FLAG8078160b3 [2021-12-16 06:04:42,080 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:04:42,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2021-12-16 06:04:42,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d2dca60/43ae0ff82a92447c8659465e251482d4/FLAG8078160b3 [2021-12-16 06:04:42,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d2dca60/43ae0ff82a92447c8659465e251482d4 [2021-12-16 06:04:42,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:04:42,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:04:42,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:04:42,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:04:42,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:04:42,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b95561f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42, skipping insertion in model container [2021-12-16 06:04:42,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:04:42,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:04:42,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2021-12-16 06:04:42,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:04:42,465 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:04:42,500 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2021-12-16 06:04:42,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:04:42,519 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:04:42,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42 WrapperNode [2021-12-16 06:04:42,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:04:42,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:04:42,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:04:42,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:04:42,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,567 INFO L137 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 143 [2021-12-16 06:04:42,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:04:42,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:04:42,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:04:42,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:04:42,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:04:42,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:04:42,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:04:42,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:04:42,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (1/1) ... [2021-12-16 06:04:42,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:04:42,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:42,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 06:04:42,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 06:04:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 06:04:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 06:04:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-16 06:04:42,649 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-16 06:04:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:04:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:04:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:04:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:04:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:04:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:04:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:04:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 06:04:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:04:42,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:04:42,805 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:04:42,819 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:04:43,075 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:04:43,080 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:04:43,080 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 06:04:43,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:04:43 BoogieIcfgContainer [2021-12-16 06:04:43,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:04:43,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:04:43,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:04:43,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:04:43,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:04:42" (1/3) ... [2021-12-16 06:04:43,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187dfacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:04:43, skipping insertion in model container [2021-12-16 06:04:43,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:42" (2/3) ... [2021-12-16 06:04:43,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187dfacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:04:43, skipping insertion in model container [2021-12-16 06:04:43,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:04:43" (3/3) ... [2021-12-16 06:04:43,087 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_equal.i [2021-12-16 06:04:43,090 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:04:43,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2021-12-16 06:04:43,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:04:43,124 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 06:04:43,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2021-12-16 06:04:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:04:43,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,157 INFO L85 PathProgramCache]: Analyzing trace with hash 895152213, now seen corresponding path program 1 times [2021-12-16 06:04:43,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832387713] [2021-12-16 06:04:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:04:43,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:43,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832387713] [2021-12-16 06:04:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832387713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:43,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:43,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:04:43,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596174796] [2021-12-16 06:04:43,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:43,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:04:43,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:04:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:43,339 INFO L87 Difference]: Start difference. First operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:43,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:43,441 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-12-16 06:04:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:04:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:04:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:43,449 INFO L225 Difference]: With dead ends: 117 [2021-12-16 06:04:43,449 INFO L226 Difference]: Without dead ends: 114 [2021-12-16 06:04:43,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:43,453 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:43,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 183 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-16 06:04:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-16 06:04:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 109 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-12-16 06:04:43,491 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 6 [2021-12-16 06:04:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:43,491 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-12-16 06:04:43,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-12-16 06:04:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:04:43,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 06:04:43,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 895152214, now seen corresponding path program 1 times [2021-12-16 06:04:43,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666261117] [2021-12-16 06:04:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:04:43,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:43,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666261117] [2021-12-16 06:04:43,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666261117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:43,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:43,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:04:43,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803313888] [2021-12-16 06:04:43,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:43,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:04:43,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:04:43,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:43,543 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:43,611 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-12-16 06:04:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:04:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:04:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:43,612 INFO L225 Difference]: With dead ends: 112 [2021-12-16 06:04:43,613 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 06:04:43,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:43,614 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:43,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:04:43,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 06:04:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-16 06:04:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 60 states have (on average 1.9) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2021-12-16 06:04:43,620 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 6 [2021-12-16 06:04:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:43,620 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2021-12-16 06:04:43,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2021-12-16 06:04:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:04:43,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 06:04:43,622 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash 972366423, now seen corresponding path program 1 times [2021-12-16 06:04:43,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643905080] [2021-12-16 06:04:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:04:43,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643905080] [2021-12-16 06:04:43,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643905080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:43,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:43,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:04:43,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264028130] [2021-12-16 06:04:43,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:43,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:04:43,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:43,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:04:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:04:43,688 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:04:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:43,758 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-12-16 06:04:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:04:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:04:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:43,759 INFO L225 Difference]: With dead ends: 119 [2021-12-16 06:04:43,760 INFO L226 Difference]: Without dead ends: 119 [2021-12-16 06:04:43,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:04:43,761 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 5 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:43,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 275 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-16 06:04:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2021-12-16 06:04:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 108 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2021-12-16 06:04:43,767 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 13 [2021-12-16 06:04:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:43,768 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2021-12-16 06:04:43,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:04:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2021-12-16 06:04:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 06:04:43,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 06:04:43,769 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573860, now seen corresponding path program 1 times [2021-12-16 06:04:43,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343547398] [2021-12-16 06:04:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:04:43,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:43,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343547398] [2021-12-16 06:04:43,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343547398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:43,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:43,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:04:43,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407015306] [2021-12-16 06:04:43,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:43,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:04:43,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:04:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:04:43,857 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:44,023 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-12-16 06:04:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:04:44,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-16 06:04:44,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:44,025 INFO L225 Difference]: With dead ends: 113 [2021-12-16 06:04:44,025 INFO L226 Difference]: Without dead ends: 113 [2021-12-16 06:04:44,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:04:44,026 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 13 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:44,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 387 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-16 06:04:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-12-16 06:04:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 61 states have (on average 1.8688524590163935) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2021-12-16 06:04:44,031 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 22 [2021-12-16 06:04:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:44,031 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2021-12-16 06:04:44,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2021-12-16 06:04:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 06:04:44,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:44,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:44,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 06:04:44,033 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573859, now seen corresponding path program 1 times [2021-12-16 06:04:44,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:44,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199511544] [2021-12-16 06:04:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:44,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:44,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199511544] [2021-12-16 06:04:44,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199511544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:44,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:44,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:04:44,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73486303] [2021-12-16 06:04:44,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:44,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:04:44,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:04:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:04:44,130 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:44,309 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2021-12-16 06:04:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:04:44,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-16 06:04:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:44,310 INFO L225 Difference]: With dead ends: 112 [2021-12-16 06:04:44,310 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 06:04:44,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:04:44,311 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 11 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:44,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 411 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 06:04:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-12-16 06:04:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2021-12-16 06:04:44,316 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 22 [2021-12-16 06:04:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:44,316 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-12-16 06:04:44,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2021-12-16 06:04:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 06:04:44,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:44,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:44,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 06:04:44,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413691, now seen corresponding path program 1 times [2021-12-16 06:04:44,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:44,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715350001] [2021-12-16 06:04:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:44,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 06:04:44,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:44,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715350001] [2021-12-16 06:04:44,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715350001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:44,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407759091] [2021-12-16 06:04:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:44,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:44,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:44,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:04:44,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 06:04:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 06:04:44,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:44,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:04:44,672 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:04:44,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 06:04:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:44,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:44,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407759091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:04:44,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:04:44,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2021-12-16 06:04:44,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211351405] [2021-12-16 06:04:44,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:44,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 06:04:44,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 06:04:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-12-16 06:04:44,936 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 06:04:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:45,158 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2021-12-16 06:04:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 06:04:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-12-16 06:04:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:45,160 INFO L225 Difference]: With dead ends: 117 [2021-12-16 06:04:45,160 INFO L226 Difference]: Without dead ends: 117 [2021-12-16 06:04:45,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-12-16 06:04:45,161 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 27 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:45,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 839 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 434 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2021-12-16 06:04:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-16 06:04:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-16 06:04:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 67 states have (on average 1.7611940298507462) internal successors, (118), 111 states have internal predecessors, (118), 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) [2021-12-16 06:04:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2021-12-16 06:04:45,165 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 25 [2021-12-16 06:04:45,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:45,165 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2021-12-16 06:04:45,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 06:04:45,166 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2021-12-16 06:04:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 06:04:45,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:45,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:45,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 06:04:45,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 06:04:45,383 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413690, now seen corresponding path program 1 times [2021-12-16 06:04:45,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:45,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484646043] [2021-12-16 06:04:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:45,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:45,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:45,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:45,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:45,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484646043] [2021-12-16 06:04:45,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484646043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:45,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764382812] [2021-12-16 06:04:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:45,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:45,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:45,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:04:45,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 06:04:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 06:04:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:45,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:04:45,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:04:45,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:45,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:04:45,846 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:04:45,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 06:04:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:04:45,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:45,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764382812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:45,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:45,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-12-16 06:04:45,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449125143] [2021-12-16 06:04:45,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:45,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 06:04:45,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 06:04:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-16 06:04:45,969 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:04:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:46,287 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2021-12-16 06:04:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:04:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-12-16 06:04:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:46,288 INFO L225 Difference]: With dead ends: 117 [2021-12-16 06:04:46,289 INFO L226 Difference]: Without dead ends: 117 [2021-12-16 06:04:46,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-12-16 06:04:46,290 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 209 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:46,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 435 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 581 Invalid, 0 Unknown, 3 Unchecked, 0.3s Time] [2021-12-16 06:04:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-16 06:04:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-12-16 06:04:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 67 states have (on average 1.7462686567164178) internal successors, (117), 110 states have internal predecessors, (117), 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) [2021-12-16 06:04:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-12-16 06:04:46,293 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 25 [2021-12-16 06:04:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:46,294 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-12-16 06:04:46,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:04:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-12-16 06:04:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 06:04:46,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:46,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:46,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 06:04:46,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-16 06:04:46,512 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:46,513 INFO L85 PathProgramCache]: Analyzing trace with hash 512234271, now seen corresponding path program 1 times [2021-12-16 06:04:46,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:46,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846598480] [2021-12-16 06:04:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:46,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:04:46,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:46,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846598480] [2021-12-16 06:04:46,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846598480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:46,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405237569] [2021-12-16 06:04:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:46,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:46,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:04:46,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 06:04:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 06:04:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:46,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:04:46,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 06:04:46,927 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-16 06:04:46,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2021-12-16 06:04:46,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 06:04:46,988 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:04:46,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:04:47,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 06:04:49,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:49,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:04:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 06:04:49,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:49,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405237569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:49,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:49,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-12-16 06:04:49,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869546099] [2021-12-16 06:04:49,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:49,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 06:04:49,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 06:04:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=222, Unknown=1, NotChecked=0, Total=272 [2021-12-16 06:04:49,174 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 06:04:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:49,462 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2021-12-16 06:04:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 06:04:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2021-12-16 06:04:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:49,463 INFO L225 Difference]: With dead ends: 126 [2021-12-16 06:04:49,464 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 06:04:49,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=76, Invalid=343, Unknown=1, NotChecked=0, Total=420 [2021-12-16 06:04:49,464 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 124 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:49,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 380 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 368 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-12-16 06:04:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 06:04:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2021-12-16 06:04:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 67 states have (on average 1.626865671641791) internal successors, (109), 102 states have internal predecessors, (109), 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) [2021-12-16 06:04:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2021-12-16 06:04:49,468 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 37 [2021-12-16 06:04:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:49,468 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2021-12-16 06:04:49,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 06:04:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2021-12-16 06:04:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 06:04:49,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:49,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:49,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 06:04:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:49,670 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:49,670 INFO L85 PathProgramCache]: Analyzing trace with hash 512234272, now seen corresponding path program 1 times [2021-12-16 06:04:49,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:49,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564119398] [2021-12-16 06:04:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:49,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:49,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:49,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:49,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:04:49,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:49,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564119398] [2021-12-16 06:04:49,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564119398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090743396] [2021-12-16 06:04:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:49,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:49,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:49,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:04:49,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 06:04:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:50,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-16 06:04:50,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:04:50,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 06:04:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:50,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2021-12-16 06:04:50,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 06:04:50,276 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:04:50,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 06:04:50,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:04:50,472 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:04:50,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-16 06:04:50,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 06:04:50,584 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:04:50,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-12-16 06:04:50,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 06:04:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:04:50,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090743396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:50,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:50,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 26 [2021-12-16 06:04:50,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787268704] [2021-12-16 06:04:50,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:50,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 06:04:50,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 06:04:50,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-12-16 06:04:50,915 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 06:04:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:51,856 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-12-16 06:04:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 06:04:51,857 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 37 [2021-12-16 06:04:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:51,858 INFO L225 Difference]: With dead ends: 127 [2021-12-16 06:04:51,858 INFO L226 Difference]: Without dead ends: 127 [2021-12-16 06:04:51,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 06:04:51,859 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 492 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:51,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 589 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 891 Invalid, 0 Unknown, 128 Unchecked, 0.5s Time] [2021-12-16 06:04:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-16 06:04:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-12-16 06:04:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.492537313432836) internal successors, (100), 93 states have internal predecessors, (100), 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) [2021-12-16 06:04:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-12-16 06:04:51,862 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 37 [2021-12-16 06:04:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:51,862 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-12-16 06:04:51,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 06:04:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-12-16 06:04:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 06:04:51,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:51,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:51,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 06:04:52,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:52,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash -47629334, now seen corresponding path program 1 times [2021-12-16 06:04:52,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:52,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865044276] [2021-12-16 06:04:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:52,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 06:04:52,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:52,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865044276] [2021-12-16 06:04:52,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865044276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:52,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:52,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:04:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629819488] [2021-12-16 06:04:52,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:04:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:04:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:04:52,193 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:04:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:52,361 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2021-12-16 06:04:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:04:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-16 06:04:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:52,363 INFO L225 Difference]: With dead ends: 115 [2021-12-16 06:04:52,363 INFO L226 Difference]: Without dead ends: 115 [2021-12-16 06:04:52,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:04:52,363 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 69 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:52,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 266 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:04:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-16 06:04:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2021-12-16 06:04:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.462686567164179) internal successors, (98), 91 states have internal predecessors, (98), 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) [2021-12-16 06:04:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2021-12-16 06:04:52,370 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 40 [2021-12-16 06:04:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2021-12-16 06:04:52,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:04:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2021-12-16 06:04:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 06:04:52,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:52,371 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:52,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 06:04:52,372 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:52,372 INFO L85 PathProgramCache]: Analyzing trace with hash -47629333, now seen corresponding path program 1 times [2021-12-16 06:04:52,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:52,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920437614] [2021-12-16 06:04:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:52,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 06:04:52,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:52,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920437614] [2021-12-16 06:04:52,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920437614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:52,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:52,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:04:52,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174758919] [2021-12-16 06:04:52,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:52,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:04:52,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:52,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:04:52,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:04:52,466 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:04:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:52,641 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2021-12-16 06:04:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:04:52,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-16 06:04:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:52,643 INFO L225 Difference]: With dead ends: 95 [2021-12-16 06:04:52,643 INFO L226 Difference]: Without dead ends: 95 [2021-12-16 06:04:52,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:04:52,644 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 70 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:52,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 281 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:04:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-16 06:04:52,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-16 06:04:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 89 states have internal predecessors, (96), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-12-16 06:04:52,648 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 40 [2021-12-16 06:04:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:52,649 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-12-16 06:04:52,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:04:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-12-16 06:04:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:04:52,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:52,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:52,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 06:04:52,650 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:52,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1476263067, now seen corresponding path program 1 times [2021-12-16 06:04:52,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:52,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572073045] [2021-12-16 06:04:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:52,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 06:04:52,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:52,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572073045] [2021-12-16 06:04:52,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572073045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:52,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800366873] [2021-12-16 06:04:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:52,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:52,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:52,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:04:53,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 06:04:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:53,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 06:04:53,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:53,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:04:53,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-12-16 06:04:53,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:53,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 06:04:53,581 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 06:04:53,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 06:04:53,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-16 06:04:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:53,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:53,732 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1062 (Array Int Int)) (|v_node_create_~temp~0#1.base_30| Int)) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_30|) (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_30| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_30| v_ArrVal_1062) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) 1))) is different from false [2021-12-16 06:04:53,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800366873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:53,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:53,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-12-16 06:04:53,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828438219] [2021-12-16 06:04:53,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:53,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 06:04:53,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 06:04:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=672, Unknown=3, NotChecked=52, Total=812 [2021-12-16 06:04:53,734 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:04:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:54,538 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2021-12-16 06:04:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 06:04:54,539 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2021-12-16 06:04:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:54,540 INFO L225 Difference]: With dead ends: 141 [2021-12-16 06:04:54,540 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 06:04:54,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1088, Unknown=6, NotChecked=68, Total=1332 [2021-12-16 06:04:54,541 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 87 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:54,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1174 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1146 Invalid, 0 Unknown, 84 Unchecked, 0.6s Time] [2021-12-16 06:04:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 06:04:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 94. [2021-12-16 06:04:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.411764705882353) internal successors, (96), 88 states have internal predecessors, (96), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-12-16 06:04:54,543 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 41 [2021-12-16 06:04:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:54,544 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-12-16 06:04:54,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:04:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-12-16 06:04:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:04:54,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:54,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:54,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 06:04:54,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 06:04:54,751 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1476263066, now seen corresponding path program 1 times [2021-12-16 06:04:54,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:54,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978795316] [2021-12-16 06:04:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:54,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:54,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:54,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:54,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:04:55,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978795316] [2021-12-16 06:04:55,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978795316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631405507] [2021-12-16 06:04:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:55,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:55,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:55,194 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:04:55,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 06:04:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:55,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-16 06:04:55,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:55,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:04:55,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:04:55,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-16 06:04:55,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-16 06:04:55,812 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1223 (Array Int Int)) (v_ArrVal_1222 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1222)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1223)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0))) is different from true [2021-12-16 06:04:55,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:55,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 06:04:55,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:55,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-12-16 06:04:55,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:55,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-12-16 06:04:55,912 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 06:04:55,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-16 06:04:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:04:55,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-16 06:04:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-12-16 06:04:56,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:56,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631405507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:56,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:56,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-12-16 06:04:56,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634380234] [2021-12-16 06:04:56,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:56,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 06:04:56,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 06:04:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1022, Unknown=1, NotChecked=64, Total=1190 [2021-12-16 06:04:56,260 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 31 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:04:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:57,590 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2021-12-16 06:04:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 06:04:57,591 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2021-12-16 06:04:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:57,591 INFO L225 Difference]: With dead ends: 148 [2021-12-16 06:04:57,591 INFO L226 Difference]: Without dead ends: 148 [2021-12-16 06:04:57,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1854, Unknown=1, NotChecked=88, Total=2162 [2021-12-16 06:04:57,593 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 253 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:57,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1264 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1588 Invalid, 0 Unknown, 104 Unchecked, 0.8s Time] [2021-12-16 06:04:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-16 06:04:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-12-16 06:04:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.368421052631579) internal successors, (104), 96 states have internal predecessors, (104), 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) [2021-12-16 06:04:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-12-16 06:04:57,595 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 41 [2021-12-16 06:04:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:57,595 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-12-16 06:04:57,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:04:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-12-16 06:04:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 06:04:57,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:57,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:57,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 06:04:57,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:57,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:57,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1472852043, now seen corresponding path program 1 times [2021-12-16 06:04:57,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:57,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235754040] [2021-12-16 06:04:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:57,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:57,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:57,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:57,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 06:04:57,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:57,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235754040] [2021-12-16 06:04:57,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235754040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:57,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:57,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:04:57,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137877960] [2021-12-16 06:04:57,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:57,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:04:57,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:04:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:04:57,874 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:04:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:57,943 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-12-16 06:04:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:04:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-12-16 06:04:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:57,944 INFO L225 Difference]: With dead ends: 119 [2021-12-16 06:04:57,944 INFO L226 Difference]: Without dead ends: 119 [2021-12-16 06:04:57,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:04:57,945 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 145 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:57,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 165 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-16 06:04:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-12-16 06:04:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.355263157894737) internal successors, (103), 95 states have internal predecessors, (103), 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) [2021-12-16 06:04:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-12-16 06:04:57,949 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 42 [2021-12-16 06:04:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:57,949 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-12-16 06:04:57,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:04:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-12-16 06:04:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:04:57,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:57,950 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:57,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 06:04:57,950 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:57,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:57,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1928392465, now seen corresponding path program 1 times [2021-12-16 06:04:57,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:57,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264451739] [2021-12-16 06:04:57,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:57,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:58,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:58,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:58,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:04:58,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:58,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264451739] [2021-12-16 06:04:58,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264451739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:58,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843049573] [2021-12-16 06:04:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:58,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:58,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:58,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:04:58,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 06:04:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 06:04:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:58,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-16 06:04:58,848 WARN L860 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1523 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1523)))) is different from true [2021-12-16 06:04:58,858 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1524 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1524))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2021-12-16 06:04:58,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:58,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-12-16 06:04:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 06:04:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2021-12-16 06:04:58,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:59,062 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_36| Int) (v_ArrVal_1528 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_36| v_ArrVal_1528) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (or (<= 1 .cse0) (<= (+ .cse0 1) 0) (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_36|)))) is different from false [2021-12-16 06:04:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843049573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:59,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:59,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2021-12-16 06:04:59,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227333725] [2021-12-16 06:04:59,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:59,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 06:04:59,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 06:04:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=961, Unknown=3, NotChecked=192, Total=1260 [2021-12-16 06:04:59,064 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:04:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:59,764 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-12-16 06:04:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 06:04:59,764 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-16 06:04:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:59,765 INFO L225 Difference]: With dead ends: 101 [2021-12-16 06:04:59,765 INFO L226 Difference]: Without dead ends: 101 [2021-12-16 06:04:59,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1629, Unknown=5, NotChecked=252, Total=2070 [2021-12-16 06:04:59,766 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:59,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 999 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 661 Invalid, 0 Unknown, 174 Unchecked, 0.4s Time] [2021-12-16 06:04:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-16 06:04:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-12-16 06:04:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 74 states have (on average 1.337837837837838) internal successors, (99), 92 states have internal predecessors, (99), 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) [2021-12-16 06:04:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2021-12-16 06:04:59,769 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 44 [2021-12-16 06:04:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:59,769 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2021-12-16 06:04:59,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:04:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2021-12-16 06:04:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 06:04:59,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:59,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:59,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 06:04:59,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:59,970 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:04:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash -710984888, now seen corresponding path program 1 times [2021-12-16 06:04:59,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:59,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279813580] [2021-12-16 06:04:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:59,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:00,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:05:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:00,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:05:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:00,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:05:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:00,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:00,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279813580] [2021-12-16 06:05:00,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279813580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:00,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817730799] [2021-12-16 06:05:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:00,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:00,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:00,638 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:00,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 06:05:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-16 06:05:00,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:00,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:01,106 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:05:01,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 06:05:01,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:01,388 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:05:01,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-16 06:05:01,594 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:05:01,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 22 [2021-12-16 06:05:01,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:01,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-16 06:05:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:01,887 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 06:05:01,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 51 [2021-12-16 06:05:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:01,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2021-12-16 06:05:01,918 INFO L354 Elim1Store]: treesize reduction 84, result has 37.8 percent of original size [2021-12-16 06:05:01,919 INFO L388 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 65 [2021-12-16 06:05:02,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-12-16 06:05:02,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:05:02,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 33 [2021-12-16 06:05:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:02,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:02,614 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1700 (Array Int Int)) (v_ArrVal_1699 (Array Int Int)) (|v_node_create_~temp~0#1.base_39| Int)) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_39|) (not (= 0 (select |c_#valid| |v_node_create_~temp~0#1.base_39|))) (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_39| 1) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_39| v_ArrVal_1700))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_39| v_ArrVal_1699) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) 1))) is different from false [2021-12-16 06:05:02,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817730799] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:02,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:02,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-12-16 06:05:02,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766644074] [2021-12-16 06:05:02,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:02,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-16 06:05:02,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:02,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-16 06:05:02,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2094, Unknown=3, NotChecked=92, Total=2352 [2021-12-16 06:05:02,617 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 48 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 06:05:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:03,445 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2021-12-16 06:05:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 06:05:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2021-12-16 06:05:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:03,446 INFO L225 Difference]: With dead ends: 138 [2021-12-16 06:05:03,446 INFO L226 Difference]: Without dead ends: 138 [2021-12-16 06:05:03,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=262, Invalid=3042, Unknown=6, NotChecked=112, Total=3422 [2021-12-16 06:05:03,447 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 64 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:03,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1073 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 820 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2021-12-16 06:05:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-16 06:05:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2021-12-16 06:05:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 110 states have internal predecessors, (120), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 06:05:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2021-12-16 06:05:03,450 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 46 [2021-12-16 06:05:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:03,450 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2021-12-16 06:05:03,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 06:05:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2021-12-16 06:05:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 06:05:03,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:03,451 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:03,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 06:05:03,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 06:05:03,659 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:05:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash -710984887, now seen corresponding path program 1 times [2021-12-16 06:05:03,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:03,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264330685] [2021-12-16 06:05:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:03,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:04,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:05:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:04,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:05:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:04,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:05:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:04,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264330685] [2021-12-16 06:05:04,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264330685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972093671] [2021-12-16 06:05:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:04,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:04,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:04,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:04,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 06:05:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-16 06:05:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:04,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:04,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:05,187 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 06:05:05,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 06:05:05,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:05:05,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:05,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:05,523 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:05:05,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2021-12-16 06:05:05,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-16 06:05:05,713 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:05:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 34 [2021-12-16 06:05:05,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:05,738 INFO L388 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 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:05:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:06,018 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 06:05:06,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 59 [2021-12-16 06:05:06,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:06,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-16 06:05:06,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:06,035 INFO L388 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 [2021-12-16 06:05:06,046 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-16 06:05:06,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-16 06:05:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 06:05:06,462 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:05:06,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 41 [2021-12-16 06:05:06,467 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 06:05:06,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-12-16 06:05:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:06,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:06,999 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1878 (Array Int Int)) (|v_node_create_~temp~0#1.base_42| Int)) (or (< (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_42| v_ArrVal_1878) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|) 0) (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_42|) (not (= 0 (select |c_#valid| |v_node_create_~temp~0#1.base_42|))) (and (forall ((v_ArrVal_1879 (Array Int Int)) (v_ArrVal_1880 Int)) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_42| v_ArrVal_1878)) (.cse3 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_42| v_ArrVal_1879))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) (.cse2 (select (select .cse0 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (<= (+ (select (select .cse0 .cse1) .cse2) 4) (select (store |c_#length| |v_node_create_~temp~0#1.base_42| v_ArrVal_1880) (select (select .cse3 .cse1) .cse2)))))) (forall ((v_ArrVal_1879 (Array Int Int))) (<= 0 (let ((.cse4 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_42| v_ArrVal_1878))) (select (select .cse4 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_42| v_ArrVal_1879) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) (select (select .cse4 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)))))))) is different from false [2021-12-16 06:05:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972093671] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:07,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:07,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 55 [2021-12-16 06:05:07,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872198614] [2021-12-16 06:05:07,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:07,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-16 06:05:07,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-16 06:05:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3564, Unknown=9, NotChecked=120, Total=3906 [2021-12-16 06:05:07,003 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 56 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 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) [2021-12-16 06:05:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:09,277 INFO L93 Difference]: Finished difference Result 182 states and 199 transitions. [2021-12-16 06:05:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 06:05:09,278 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 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) Word has length 46 [2021-12-16 06:05:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:09,278 INFO L225 Difference]: With dead ends: 182 [2021-12-16 06:05:09,278 INFO L226 Difference]: Without dead ends: 182 [2021-12-16 06:05:09,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=418, Invalid=5897, Unknown=9, NotChecked=156, Total=6480 [2021-12-16 06:05:09,280 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 139 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:09,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 2280 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1714 Invalid, 0 Unknown, 421 Unchecked, 1.0s Time] [2021-12-16 06:05:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-16 06:05:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 117. [2021-12-16 06:05:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 109 states have internal predecessors, (118), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 06:05:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2021-12-16 06:05:09,284 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 46 [2021-12-16 06:05:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:09,285 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2021-12-16 06:05:09,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 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) [2021-12-16 06:05:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2021-12-16 06:05:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 06:05:09,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:09,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:09,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:09,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 06:05:09,499 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:05:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:09,500 INFO L85 PathProgramCache]: Analyzing trace with hash 555333, now seen corresponding path program 2 times [2021-12-16 06:05:09,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:09,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934256274] [2021-12-16 06:05:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:09,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:09,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:05:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:09,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:05:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:09,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:05:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:10,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934256274] [2021-12-16 06:05:10,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934256274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973462865] [2021-12-16 06:05:10,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:10,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:10,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:10,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:10,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 06:05:10,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:05:10,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-16 06:05:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:10,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:10,745 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 06:05:10,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 06:05:10,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:10,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:10,996 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-16 06:05:10,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-12-16 06:05:10,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-16 06:05:19,457 INFO L354 Elim1Store]: treesize reduction 72, result has 29.4 percent of original size [2021-12-16 06:05:19,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 78 [2021-12-16 06:05:19,484 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-12-16 06:05:19,484 INFO L388 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 26 treesize of output 41 [2021-12-16 06:05:19,498 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-16 06:05:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 53 [2021-12-16 06:05:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:21,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 06:05:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:21,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 06:05:21,023 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 06:05:21,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 30 [2021-12-16 06:05:21,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 06:05:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 06:05:21,590 INFO L354 Elim1Store]: treesize reduction 142, result has 13.4 percent of original size [2021-12-16 06:05:21,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 60 [2021-12-16 06:05:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:21,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:22,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973462865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:22,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:22,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 58 [2021-12-16 06:05:22,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343626668] [2021-12-16 06:05:22,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:22,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-16 06:05:22,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:22,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-16 06:05:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4578, Unknown=4, NotChecked=0, Total=4830 [2021-12-16 06:05:22,607 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand has 58 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 51 states have internal predecessors, (89), 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) [2021-12-16 06:05:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:37,102 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2021-12-16 06:05:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 06:05:37,103 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 51 states have internal predecessors, (89), 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) Word has length 51 [2021-12-16 06:05:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:37,104 INFO L225 Difference]: With dead ends: 122 [2021-12-16 06:05:37,104 INFO L226 Difference]: Without dead ends: 122 [2021-12-16 06:05:37,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=498, Invalid=8236, Unknown=8, NotChecked=0, Total=8742 [2021-12-16 06:05:37,107 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 34 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:37,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1928 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 965 Invalid, 0 Unknown, 489 Unchecked, 0.5s Time] [2021-12-16 06:05:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-16 06:05:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-12-16 06:05:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 112 states have internal predecessors, (121), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 06:05:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2021-12-16 06:05:37,118 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 51 [2021-12-16 06:05:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:37,118 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2021-12-16 06:05:37,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 51 states have internal predecessors, (89), 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) [2021-12-16 06:05:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2021-12-16 06:05:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 06:05:37,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:37,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:37,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:37,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 06:05:37,341 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:05:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:37,341 INFO L85 PathProgramCache]: Analyzing trace with hash 430095050, now seen corresponding path program 1 times [2021-12-16 06:05:37,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:37,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593747741] [2021-12-16 06:05:37,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:37,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:37,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:05:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:37,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:05:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:37,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:05:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:37,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:37,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593747741] [2021-12-16 06:05:37,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593747741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:37,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693733448] [2021-12-16 06:05:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:37,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:37,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:37,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:37,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 06:05:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 06:05:38,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:38,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:38,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:38,360 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 06:05:38,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2021-12-16 06:05:38,410 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 06:05:38,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-12-16 06:05:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 06:05:38,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:38,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693733448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:38,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:05:38,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 29 [2021-12-16 06:05:38,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789899943] [2021-12-16 06:05:38,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:38,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 06:05:38,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:38,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 06:05:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-12-16 06:05:38,416 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:38,617 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2021-12-16 06:05:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 06:05:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-12-16 06:05:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:38,618 INFO L225 Difference]: With dead ends: 142 [2021-12-16 06:05:38,618 INFO L226 Difference]: Without dead ends: 142 [2021-12-16 06:05:38,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 06:05:38,619 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 122 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:38,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 348 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-16 06:05:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-16 06:05:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2021-12-16 06:05:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 113 states have internal predecessors, (123), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 06:05:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2021-12-16 06:05:38,627 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 52 [2021-12-16 06:05:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:38,628 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2021-12-16 06:05:38,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2021-12-16 06:05:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 06:05:38,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:38,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:38,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:38,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:38,830 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:05:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash 430095051, now seen corresponding path program 1 times [2021-12-16 06:05:38,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:38,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926784512] [2021-12-16 06:05:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:38,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:39,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:05:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:39,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:05:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:39,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:05:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:39,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:39,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926784512] [2021-12-16 06:05:39,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926784512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:39,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428861516] [2021-12-16 06:05:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:39,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:39,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:39,494 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:39,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 06:05:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-16 06:05:39,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:40,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:40,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:40,089 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 06:05:40,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2021-12-16 06:05:40,102 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 06:05:40,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-16 06:05:40,167 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 06:05:40,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-12-16 06:05:40,171 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 06:05:40,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-16 06:05:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 06:05:40,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:40,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428861516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:40,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:05:40,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [26] total 36 [2021-12-16 06:05:40,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586922920] [2021-12-16 06:05:40,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:40,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 06:05:40,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 06:05:40,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 06:05:40,225 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:40,430 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-12-16 06:05:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 06:05:40,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-12-16 06:05:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:40,432 INFO L225 Difference]: With dead ends: 126 [2021-12-16 06:05:40,432 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 06:05:40,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 06:05:40,433 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 79 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:40,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 366 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 239 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-16 06:05:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 06:05:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-12-16 06:05:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 97 states have (on average 1.288659793814433) internal successors, (125), 115 states have internal predecessors, (125), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 06:05:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2021-12-16 06:05:40,436 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 52 [2021-12-16 06:05:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:40,436 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2021-12-16 06:05:40,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2021-12-16 06:05:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 06:05:40,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:40,437 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:40,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:40,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:40,647 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:05:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1004484877, now seen corresponding path program 1 times [2021-12-16 06:05:40,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:40,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556649411] [2021-12-16 06:05:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:40,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:05:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:05:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:05:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:41,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:41,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556649411] [2021-12-16 06:05:41,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556649411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:41,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702491052] [2021-12-16 06:05:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:41,595 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:41,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 06:05:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-16 06:05:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:41,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:42,006 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 06:05:42,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 06:05:42,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:42,186 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:05:42,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-16 06:05:42,334 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:05:42,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2021-12-16 06:05:42,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-16 06:05:42,449 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2658 (Array Int Int)) (|node_create_~temp~0#1.base| Int) (v_ArrVal_2657 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2657)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2658)) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0))) is different from true [2021-12-16 06:05:42,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:42,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 06:05:42,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:42,498 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 06:05:42,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-12-16 06:05:42,511 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-16 06:05:42,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-16 06:05:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:05:42,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 06:05:42,698 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:05:42,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 21 [2021-12-16 06:05:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-16 06:05:42,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:42,945 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2666 (Array Int Int)) (v_ArrVal_2665 (Array Int Int)) (|v_node_create_~temp~0#1.base_48| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_48| v_ArrVal_2666) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (or (< .cse0 0) (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_48|) (not (= 0 (select |c_#valid| |v_node_create_~temp~0#1.base_48|))) (not (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_48| v_ArrVal_2665))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (= (select (select .cse1 .cse2) .cse0) .cse2))))))) is different from false [2021-12-16 06:05:42,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702491052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:42,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:42,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 46 [2021-12-16 06:05:42,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539477703] [2021-12-16 06:05:42,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:42,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-16 06:05:42,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-16 06:05:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2191, Unknown=2, NotChecked=190, Total=2550 [2021-12-16 06:05:42,948 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 06:05:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:44,278 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2021-12-16 06:05:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 06:05:44,279 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2021-12-16 06:05:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:44,279 INFO L225 Difference]: With dead ends: 126 [2021-12-16 06:05:44,279 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 06:05:44,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=336, Invalid=3210, Unknown=2, NotChecked=234, Total=3782 [2021-12-16 06:05:44,281 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 110 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:44,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1345 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1148 Invalid, 0 Unknown, 140 Unchecked, 0.6s Time] [2021-12-16 06:05:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 06:05:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-12-16 06:05:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 97 states have (on average 1.2783505154639174) internal successors, (124), 115 states have internal predecessors, (124), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 06:05:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2021-12-16 06:05:44,285 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 54 [2021-12-16 06:05:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:44,285 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2021-12-16 06:05:44,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 06:05:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2021-12-16 06:05:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 06:05:44,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:44,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-12-16 06:05:44,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:44,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-16 06:05:44,504 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:05:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:44,505 INFO L85 PathProgramCache]: Analyzing trace with hash 749733786, now seen corresponding path program 3 times [2021-12-16 06:05:44,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:44,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257931221] [2021-12-16 06:05:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:44,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:05:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:05:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 06:05:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 06:05:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 06:05:44,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257931221] [2021-12-16 06:05:44,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257931221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446062629] [2021-12-16 06:05:44,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 06:05:44,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:44,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:44,576 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:44,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 06:05:44,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 06:05:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 06:05:44,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:44,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446062629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:44,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:05:44,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-16 06:05:44,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600191736] [2021-12-16 06:05:44,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:44,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:05:44,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:05:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:44,895 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 06:05:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:44,901 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-12-16 06:05:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:05:44,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-12-16 06:05:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:44,904 INFO L225 Difference]: With dead ends: 91 [2021-12-16 06:05:44,904 INFO L226 Difference]: Without dead ends: 91 [2021-12-16 06:05:44,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:44,905 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 65 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:44,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 104 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-16 06:05:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-16 06:05:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.267605633802817) internal successors, (90), 85 states have internal predecessors, (90), 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) [2021-12-16 06:05:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-12-16 06:05:44,908 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 58 [2021-12-16 06:05:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:44,909 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-12-16 06:05:44,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 06:05:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-12-16 06:05:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 06:05:44,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:44,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:44,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:45,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:45,115 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-12-16 06:05:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:45,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1017304566, now seen corresponding path program 1 times [2021-12-16 06:05:45,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:45,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009640587] [2021-12-16 06:05:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:45,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:45,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:05:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:45,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:05:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:46,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:05:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:46,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:46,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009640587] [2021-12-16 06:05:46,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009640587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:46,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087112310] [2021-12-16 06:05:46,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:46,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:46,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:46,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:46,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 06:05:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:46,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-16 06:05:46,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:46,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:46,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 06:05:47,072 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 06:05:47,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 06:05:47,220 INFO L388 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 11 treesize of output 7 [2021-12-16 06:05:47,349 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-16 06:05:47,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 06:05:47,501 INFO L388 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 11 treesize of output 7 [2021-12-16 06:05:47,703 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:05:47,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-12-16 06:05:47,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:05:47,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 26 [2021-12-16 06:05:47,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-16 06:05:48,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 06:05:48,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:48,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 06:05:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:48,439 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 06:05:48,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 49 [2021-12-16 06:05:48,456 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-16 06:05:48,456 INFO L388 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 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-16 06:05:48,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:05:49,148 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-12-16 06:05:49,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 33 [2021-12-16 06:05:49,405 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-16 06:05:49,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 06:05:49,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:49,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:49,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-12-16 06:05:49,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:05:49,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-16 06:05:49,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-16 06:05:49,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-16 06:05:49,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-16 06:05:49,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-16 06:05:49,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 06:05:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:05:49,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:50,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3085 (Array Int Int)) (v_ArrVal_3083 (Array Int Int)) (v_ArrVal_3084 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3084) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3083) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3085) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-16 06:05:50,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 06:05:50,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-12-16 06:05:50,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 06:05:50,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 87 [2021-12-16 06:05:50,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 06:05:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 64 [2021-12-16 06:05:50,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 06:05:50,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 113 [2021-12-16 06:05:50,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-12-16 06:05:50,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2021-12-16 06:05:51,068 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_160 Int) (v_arrayElimCell_162 Int) (v_ArrVal_3080 (Array Int Int)) (v_ArrVal_3084 (Array Int Int))) (let ((.cse0 (= |c_ULTIMATE.start_main_~#s~0#1.base| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base|)) (.cse1 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse2 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (and .cse0 (forall ((v_arrayElimCell_164 Int) (v_arrayElimCell_163 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3080) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3084) v_arrayElimCell_163) (+ v_arrayElimCell_164 4)) |c_ULTIMATE.start_main_~data~0#1|))) (and (not .cse0) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3080) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3084) v_arrayElimCell_160) (+ v_arrayElimCell_162 4)) |c_ULTIMATE.start_main_~data~0#1|)) (and .cse1 .cse2 (not (= |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_arrayElimCell_160))) (and (not (= |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| v_arrayElimCell_162)) .cse1 .cse2)))) is different from false [2021-12-16 06:05:52,107 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_160 Int) (v_arrayElimCell_162 Int) (v_ArrVal_3080 (Array Int Int)) (v_ArrVal_3077 Int) (v_ArrVal_3084 (Array Int Int))) (let ((.cse0 (= |c_ULTIMATE.start_main_~#s~0#1.base| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base|)) (.cse1 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse2 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (and (not .cse0) (= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| v_ArrVal_3077)) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3080) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3084) v_arrayElimCell_160) (+ v_arrayElimCell_162 4)) |c_ULTIMATE.start_main_~data~0#1|)) (and (forall ((v_arrayElimCell_164 Int) (v_arrayElimCell_163 Int)) (= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| v_ArrVal_3077)) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| v_ArrVal_3080) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_3084) v_arrayElimCell_163) (+ v_arrayElimCell_164 4)) |c_ULTIMATE.start_main_~data~0#1|)) .cse0) (and .cse1 .cse2 (not (= |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_arrayElimCell_160))) (and (not (= |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| v_arrayElimCell_162)) .cse1 .cse2)))) is different from false