./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/memsafety-ext2/split_list_test05-2.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 db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:05:20,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:05:20,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:05:20,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:05:20,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:05:20,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:05:20,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:05:20,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:05:20,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:05:20,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:05:20,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:05:20,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:05:20,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:05:20,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:05:20,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:05:20,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:05:20,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:05:20,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:05:20,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:05:20,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:05:20,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:05:20,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:05:20,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:05:20,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:05:20,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:05:20,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:05:20,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:05:20,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:05:20,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:05:20,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:05:20,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:05:20,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:05:20,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:05:20,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:05:20,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:05:20,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:05:20,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:05:20,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:05:20,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:05:20,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:05:20,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:05:20,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:05:20,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:05:20,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:05:20,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:05:20,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:05:20,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:05:20,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:05:20,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:05:20,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:05:20,419 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:05:20,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:05:20,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:05:20,420 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:05:20,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:05:20,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:05:20,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:05:20,420 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:05:20,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:05:20,421 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:05:20,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:05:20,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:05:20,421 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:05:20,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:05:20,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:05:20,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:05:20,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:05:20,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:05:20,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:05:20,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:05:20,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:05:20,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:05:20,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:05:20,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2021-12-22 00:05:20,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:05:20,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:05:20,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:05:20,607 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:05:20,608 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:05:20,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2021-12-22 00:05:20,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30d8f562f/ff6087e17fc044fb841053b913c102db/FLAG67feadbbe [2021-12-22 00:05:21,074 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:05:21,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2021-12-22 00:05:21,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30d8f562f/ff6087e17fc044fb841053b913c102db/FLAG67feadbbe [2021-12-22 00:05:21,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30d8f562f/ff6087e17fc044fb841053b913c102db [2021-12-22 00:05:21,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:05:21,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:05:21,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:05:21,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:05:21,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:05:21,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5567cbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21, skipping insertion in model container [2021-12-22 00:05:21,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:05:21,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:05:21,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:05:21,406 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:05:21,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:05:21,473 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:05:21,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21 WrapperNode [2021-12-22 00:05:21,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:05:21,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:05:21,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:05:21,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:05:21,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,524 INFO L137 Inliner]: procedures = 125, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 302 [2021-12-22 00:05:21,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:05:21,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:05:21,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:05:21,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:05:21,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:05:21,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:05:21,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:05:21,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:05:21,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (1/1) ... [2021-12-22 00:05:21,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:05:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:21,594 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) [2021-12-22 00:05:21,598 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 [2021-12-22 00:05:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 00:05:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 00:05:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:05:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:05:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 00:05:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:05:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:05:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 00:05:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:05:21,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:05:21,631 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-12-22 00:05:21,631 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-12-22 00:05:21,727 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:05:21,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:05:22,202 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:05:22,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:05:22,213 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-22 00:05:22,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:05:22 BoogieIcfgContainer [2021-12-22 00:05:22,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:05:22,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:05:22,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:05:22,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:05:22,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:05:21" (1/3) ... [2021-12-22 00:05:22,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61af1a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:05:22, skipping insertion in model container [2021-12-22 00:05:22,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:05:21" (2/3) ... [2021-12-22 00:05:22,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61af1a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:05:22, skipping insertion in model container [2021-12-22 00:05:22,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:05:22" (3/3) ... [2021-12-22 00:05:22,221 INFO L111 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2021-12-22 00:05:22,225 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:05:22,225 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2021-12-22 00:05:22,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:05:22,273 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 [2021-12-22 00:05:22,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2021-12-22 00:05:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 323 states, 159 states have (on average 2.138364779874214) internal successors, (340), 308 states have internal predecessors, (340), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 00:05:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 00:05:22,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:22,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 00:05:22,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-22 00:05:22,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:22,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339831035] [2021-12-22 00:05:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:22,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:22,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:22,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339831035] [2021-12-22 00:05:22,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339831035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:05:22,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:05:22,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:05:22,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856483552] [2021-12-22 00:05:22,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:05:22,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:05:22,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:05:22,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:05:22,467 INFO L87 Difference]: Start difference. First operand has 323 states, 159 states have (on average 2.138364779874214) internal successors, (340), 308 states have internal predecessors, (340), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:05:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:22,803 INFO L93 Difference]: Finished difference Result 548 states and 601 transitions. [2021-12-22 00:05:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:05:22,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 00:05:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:22,819 INFO L225 Difference]: With dead ends: 548 [2021-12-22 00:05:22,820 INFO L226 Difference]: Without dead ends: 546 [2021-12-22 00:05:22,821 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 [2021-12-22 00:05:22,825 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 246 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:22,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 449 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:05:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-22 00:05:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 407. [2021-12-22 00:05:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 246 states have (on average 2.089430894308943) internal successors, (514), 392 states have internal predecessors, (514), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 00:05:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 544 transitions. [2021-12-22 00:05:22,881 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 544 transitions. Word has length 3 [2021-12-22 00:05:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:22,881 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 544 transitions. [2021-12-22 00:05:22,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:05:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 544 transitions. [2021-12-22 00:05:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 00:05:22,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:22,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 00:05:22,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:05:22,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-22 00:05:22,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:22,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740528170] [2021-12-22 00:05:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:22,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:22,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740528170] [2021-12-22 00:05:22,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740528170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:05:22,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:05:22,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:05:22,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283730317] [2021-12-22 00:05:22,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:05:22,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:05:22,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:05:22,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:05:22,928 INFO L87 Difference]: Start difference. First operand 407 states and 544 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:05:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:23,075 INFO L93 Difference]: Finished difference Result 408 states and 547 transitions. [2021-12-22 00:05:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:05:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 00:05:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:23,077 INFO L225 Difference]: With dead ends: 408 [2021-12-22 00:05:23,078 INFO L226 Difference]: Without dead ends: 408 [2021-12-22 00:05:23,078 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 [2021-12-22 00:05:23,082 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 6 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:23,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 567 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:05:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-22 00:05:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 405. [2021-12-22 00:05:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 246 states have (on average 2.0813008130081303) internal successors, (512), 390 states have internal predecessors, (512), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 00:05:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 542 transitions. [2021-12-22 00:05:23,102 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 542 transitions. Word has length 3 [2021-12-22 00:05:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:23,103 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 542 transitions. [2021-12-22 00:05:23,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:05:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 542 transitions. [2021-12-22 00:05:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:05:23,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:23,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:23,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:05:23,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:23,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1117386190, now seen corresponding path program 1 times [2021-12-22 00:05:23,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572019291] [2021-12-22 00:05:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:23,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:23,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:23,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572019291] [2021-12-22 00:05:23,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572019291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:05:23,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:05:23,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:05:23,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198610978] [2021-12-22 00:05:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:05:23,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:05:23,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:23,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:05:23,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:05:23,171 INFO L87 Difference]: Start difference. First operand 405 states and 542 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-22 00:05:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:23,300 INFO L93 Difference]: Finished difference Result 400 states and 537 transitions. [2021-12-22 00:05:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:05:23,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-12-22 00:05:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:23,302 INFO L225 Difference]: With dead ends: 400 [2021-12-22 00:05:23,303 INFO L226 Difference]: Without dead ends: 400 [2021-12-22 00:05:23,303 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 [2021-12-22 00:05:23,308 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 43 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:23,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 496 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:05:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-22 00:05:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-12-22 00:05:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 385 states have internal predecessors, (507), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 00:05:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 537 transitions. [2021-12-22 00:05:23,320 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 537 transitions. Word has length 10 [2021-12-22 00:05:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:23,320 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 537 transitions. [2021-12-22 00:05:23,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-22 00:05:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 537 transitions. [2021-12-22 00:05:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:05:23,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:23,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:23,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 00:05:23,322 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:23,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:23,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1117386191, now seen corresponding path program 1 times [2021-12-22 00:05:23,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:23,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029237123] [2021-12-22 00:05:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:23,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:23,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:23,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029237123] [2021-12-22 00:05:23,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029237123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:05:23,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:05:23,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:05:23,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744263515] [2021-12-22 00:05:23,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:05:23,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:05:23,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:23,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:05:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:05:23,396 INFO L87 Difference]: Start difference. First operand 400 states and 537 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-22 00:05:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:23,530 INFO L93 Difference]: Finished difference Result 395 states and 532 transitions. [2021-12-22 00:05:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:05:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-12-22 00:05:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:23,534 INFO L225 Difference]: With dead ends: 395 [2021-12-22 00:05:23,534 INFO L226 Difference]: Without dead ends: 395 [2021-12-22 00:05:23,534 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 [2021-12-22 00:05:23,538 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 38 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:23,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 509 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:05:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-12-22 00:05:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2021-12-22 00:05:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 246 states have (on average 2.040650406504065) internal successors, (502), 380 states have internal predecessors, (502), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 00:05:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 532 transitions. [2021-12-22 00:05:23,547 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 532 transitions. Word has length 10 [2021-12-22 00:05:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:23,548 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 532 transitions. [2021-12-22 00:05:23,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-22 00:05:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 532 transitions. [2021-12-22 00:05:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 00:05:23,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:23,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:23,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 00:05:23,549 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash 279233943, now seen corresponding path program 1 times [2021-12-22 00:05:23,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:23,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550868772] [2021-12-22 00:05:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:23,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:23,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:23,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550868772] [2021-12-22 00:05:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550868772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:05:23,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:05:23,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:05:23,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903428320] [2021-12-22 00:05:23,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:05:23,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:05:23,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:05:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:05:23,612 INFO L87 Difference]: Start difference. First operand 395 states and 532 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-22 00:05:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:24,011 INFO L93 Difference]: Finished difference Result 523 states and 574 transitions. [2021-12-22 00:05:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:05:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2021-12-22 00:05:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:24,013 INFO L225 Difference]: With dead ends: 523 [2021-12-22 00:05:24,013 INFO L226 Difference]: Without dead ends: 523 [2021-12-22 00:05:24,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:05:24,014 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 318 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:24,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 797 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:05:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-22 00:05:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 387. [2021-12-22 00:05:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 246 states have (on average 2.008130081300813) internal successors, (494), 372 states have internal predecessors, (494), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 00:05:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 524 transitions. [2021-12-22 00:05:24,022 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 524 transitions. Word has length 11 [2021-12-22 00:05:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:24,023 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 524 transitions. [2021-12-22 00:05:24,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-22 00:05:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 524 transitions. [2021-12-22 00:05:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 00:05:24,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:24,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:24,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 00:05:24,024 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash 279233944, now seen corresponding path program 1 times [2021-12-22 00:05:24,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:24,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495023111] [2021-12-22 00:05:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:24,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:24,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:24,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495023111] [2021-12-22 00:05:24,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495023111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:05:24,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:05:24,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:05:24,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667248879] [2021-12-22 00:05:24,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:05:24,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:05:24,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:24,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:05:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:05:24,102 INFO L87 Difference]: Start difference. First operand 387 states and 524 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-22 00:05:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:24,584 INFO L93 Difference]: Finished difference Result 513 states and 564 transitions. [2021-12-22 00:05:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:05:24,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2021-12-22 00:05:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:24,586 INFO L225 Difference]: With dead ends: 513 [2021-12-22 00:05:24,586 INFO L226 Difference]: Without dead ends: 513 [2021-12-22 00:05:24,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:05:24,587 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 802 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:24,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 440 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:05:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-12-22 00:05:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 378. [2021-12-22 00:05:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 246 states have (on average 1.967479674796748) internal successors, (484), 363 states have internal predecessors, (484), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 00:05:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2021-12-22 00:05:24,593 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 11 [2021-12-22 00:05:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:24,594 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2021-12-22 00:05:24,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-22 00:05:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2021-12-22 00:05:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:05:24,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:24,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:24,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 00:05:24,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1620146378, now seen corresponding path program 1 times [2021-12-22 00:05:24,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:24,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933035672] [2021-12-22 00:05:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:24,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:24,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933035672] [2021-12-22 00:05:24,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933035672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:05:24,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:05:24,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:05:24,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430189359] [2021-12-22 00:05:24,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:05:24,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:05:24,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:05:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:05:24,682 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-12-22 00:05:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:24,921 INFO L93 Difference]: Finished difference Result 398 states and 537 transitions. [2021-12-22 00:05:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:05:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 20 [2021-12-22 00:05:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:24,923 INFO L225 Difference]: With dead ends: 398 [2021-12-22 00:05:24,923 INFO L226 Difference]: Without dead ends: 398 [2021-12-22 00:05:24,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:05:24,924 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 32 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:24,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1582 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:05:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-22 00:05:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 386. [2021-12-22 00:05:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 253 states have (on average 1.9446640316205535) internal successors, (492), 370 states have internal predecessors, (492), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 00:05:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 524 transitions. [2021-12-22 00:05:24,931 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 524 transitions. Word has length 20 [2021-12-22 00:05:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:24,931 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 524 transitions. [2021-12-22 00:05:24,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-12-22 00:05:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 524 transitions. [2021-12-22 00:05:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 00:05:24,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:24,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:24,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 00:05:24,932 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:24,933 INFO L85 PathProgramCache]: Analyzing trace with hash 248818477, now seen corresponding path program 1 times [2021-12-22 00:05:24,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:24,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130023125] [2021-12-22 00:05:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:24,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:25,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:25,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130023125] [2021-12-22 00:05:25,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130023125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:05:25,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:05:25,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 00:05:25,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455941424] [2021-12-22 00:05:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:05:25,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:05:25,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:05:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:05:25,081 INFO L87 Difference]: Start difference. First operand 386 states and 524 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-12-22 00:05:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:25,608 INFO L93 Difference]: Finished difference Result 526 states and 579 transitions. [2021-12-22 00:05:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:05:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 22 [2021-12-22 00:05:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:25,610 INFO L225 Difference]: With dead ends: 526 [2021-12-22 00:05:25,610 INFO L226 Difference]: Without dead ends: 526 [2021-12-22 00:05:25,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:05:25,611 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 751 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:25,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 1342 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:05:25,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-22 00:05:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 389. [2021-12-22 00:05:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 256 states have (on average 1.93359375) internal successors, (495), 373 states have internal predecessors, (495), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 00:05:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2021-12-22 00:05:25,619 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 22 [2021-12-22 00:05:25,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:25,619 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2021-12-22 00:05:25,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-12-22 00:05:25,619 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2021-12-22 00:05:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 00:05:25,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:25,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:25,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 00:05:25,621 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:25,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1532217100, now seen corresponding path program 1 times [2021-12-22 00:05:25,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:25,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452975695] [2021-12-22 00:05:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:25,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:25,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:05:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:26,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452975695] [2021-12-22 00:05:26,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452975695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655743933] [2021-12-22 00:05:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:26,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:26,052 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) [2021-12-22 00:05:26,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 00:05:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:26,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-22 00:05:26,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:26,228 INFO L387 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 [2021-12-22 00:05:26,535 INFO L387 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 [2021-12-22 00:05:26,540 INFO L387 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 [2021-12-22 00:05:26,637 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:26,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-22 00:05:26,653 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:26,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-22 00:05:26,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:05:26,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:05:26,830 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:26,830 INFO L387 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 20 treesize of output 26 [2021-12-22 00:05:26,850 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:26,850 INFO L387 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 20 treesize of output 26 [2021-12-22 00:05:26,883 INFO L387 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 19 treesize of output 11 [2021-12-22 00:05:27,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:27,093 INFO L353 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-22 00:05:27,094 INFO L387 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 29 treesize of output 28 [2021-12-22 00:05:27,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:27,247 INFO L387 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 26 treesize of output 28 [2021-12-22 00:05:27,258 INFO L353 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-12-22 00:05:27,258 INFO L387 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 22 treesize of output 24 [2021-12-22 00:05:27,313 INFO L387 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 46 treesize of output 44 [2021-12-22 00:05:27,317 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:27,458 INFO L387 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 46 treesize of output 44 [2021-12-22 00:05:27,462 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:27,510 INFO L387 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 46 treesize of output 44 [2021-12-22 00:05:27,516 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:27,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:27,579 INFO L387 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 39 treesize of output 21 [2021-12-22 00:05:27,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:27,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-22 00:05:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:27,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:27,676 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_329 (Array Int Int)) (v_ArrVal_330 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_330) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_329) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_330 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_330) c_append_~head.base) (+ c_append_~head.offset 4)))))) is different from false [2021-12-22 00:05:28,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:28,099 INFO L387 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 82 treesize of output 83 [2021-12-22 00:05:28,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:28,106 INFO L387 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 83 treesize of output 73 [2021-12-22 00:05:28,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:28,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:28,117 INFO L387 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 103 treesize of output 103 [2021-12-22 00:05:28,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:28,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:28,129 INFO L387 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 152 treesize of output 140 [2021-12-22 00:05:28,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:28,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 230 [2021-12-22 00:05:28,155 INFO L387 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 230 treesize of output 206 [2021-12-22 00:05:28,162 INFO L387 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 206 treesize of output 186 [2021-12-22 00:05:29,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655743933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:29,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:05:29,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-12-22 00:05:29,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269569577] [2021-12-22 00:05:29,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:05:29,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 00:05:29,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 00:05:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=4, NotChecked=60, Total=1056 [2021-12-22 00:05:29,425 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:31,695 INFO L93 Difference]: Finished difference Result 454 states and 616 transitions. [2021-12-22 00:05:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 00:05:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-22 00:05:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:31,698 INFO L225 Difference]: With dead ends: 454 [2021-12-22 00:05:31,698 INFO L226 Difference]: Without dead ends: 454 [2021-12-22 00:05:31,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=273, Invalid=1889, Unknown=4, NotChecked=90, Total=2256 [2021-12-22 00:05:31,701 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 127 mSDsluCounter, 3866 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 4183 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1043 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:31,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 4183 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2608 Invalid, 0 Unknown, 1043 Unchecked, 1.2s Time] [2021-12-22 00:05:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-22 00:05:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 445. [2021-12-22 00:05:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 306 states have (on average 1.8169934640522876) internal successors, (556), 425 states have internal predecessors, (556), 19 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (36), 17 states have call predecessors, (36), 19 states have call successors, (36) [2021-12-22 00:05:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 611 transitions. [2021-12-22 00:05:31,717 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 611 transitions. Word has length 37 [2021-12-22 00:05:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:31,718 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 611 transitions. [2021-12-22 00:05:31,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 611 transitions. [2021-12-22 00:05:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 00:05:31,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:31,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:31,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 00:05:31,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:31,939 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1532217101, now seen corresponding path program 1 times [2021-12-22 00:05:31,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:31,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189169909] [2021-12-22 00:05:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:31,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:05:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:32,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:32,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189169909] [2021-12-22 00:05:32,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189169909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:32,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216800480] [2021-12-22 00:05:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:32,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:32,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:32,239 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) [2021-12-22 00:05:32,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 00:05:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:32,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 00:05:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:32,352 INFO L387 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 [2021-12-22 00:05:32,557 INFO L387 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 [2021-12-22 00:05:32,605 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:32,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-22 00:05:32,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:05:32,694 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:32,694 INFO L387 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 20 treesize of output 26 [2021-12-22 00:05:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:32,811 INFO L353 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-22 00:05:32,812 INFO L387 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 29 treesize of output 28 [2021-12-22 00:05:32,918 INFO L353 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-12-22 00:05:32,918 INFO L387 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 28 treesize of output 45 [2021-12-22 00:05:32,964 INFO L387 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 38 treesize of output 36 [2021-12-22 00:05:33,050 INFO L387 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 38 treesize of output 36 [2021-12-22 00:05:33,083 INFO L387 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 38 treesize of output 36 [2021-12-22 00:05:33,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:33,122 INFO L387 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 31 treesize of output 13 [2021-12-22 00:05:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:33,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:33,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:33,376 INFO L387 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 33 treesize of output 34 [2021-12-22 00:05:33,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:33,385 INFO L387 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 170 treesize of output 122 [2021-12-22 00:05:33,391 INFO L387 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 86 treesize of output 78 [2021-12-22 00:05:33,396 INFO L387 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 40 treesize of output 36 [2021-12-22 00:05:34,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216800480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:34,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:05:34,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-12-22 00:05:34,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591452762] [2021-12-22 00:05:34,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:05:34,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-22 00:05:34,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-22 00:05:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=940, Unknown=10, NotChecked=0, Total=1056 [2021-12-22 00:05:34,191 INFO L87 Difference]: Start difference. First operand 445 states and 611 transitions. Second operand has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:35,143 INFO L93 Difference]: Finished difference Result 482 states and 647 transitions. [2021-12-22 00:05:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 00:05:35,143 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-22 00:05:35,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:35,146 INFO L225 Difference]: With dead ends: 482 [2021-12-22 00:05:35,146 INFO L226 Difference]: Without dead ends: 482 [2021-12-22 00:05:35,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1378, Unknown=10, NotChecked=0, Total=1560 [2021-12-22 00:05:35,147 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 81 mSDsluCounter, 3767 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 4075 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:35,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 4075 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1679 Invalid, 0 Unknown, 743 Unchecked, 0.6s Time] [2021-12-22 00:05:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-22 00:05:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 476. [2021-12-22 00:05:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 335 states have (on average 1.7552238805970148) internal successors, (588), 455 states have internal predecessors, (588), 19 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (36), 17 states have call predecessors, (36), 19 states have call successors, (36) [2021-12-22 00:05:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 643 transitions. [2021-12-22 00:05:35,156 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 643 transitions. Word has length 37 [2021-12-22 00:05:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:35,156 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 643 transitions. [2021-12-22 00:05:35,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 643 transitions. [2021-12-22 00:05:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 00:05:35,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:35,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:35,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 00:05:35,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 00:05:35,372 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash -568836631, now seen corresponding path program 1 times [2021-12-22 00:05:35,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:35,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217396947] [2021-12-22 00:05:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:35,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:35,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:05:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:35,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217396947] [2021-12-22 00:05:35,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217396947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017505891] [2021-12-22 00:05:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:35,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:35,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:35,774 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) [2021-12-22 00:05:35,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 00:05:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:35,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-22 00:05:35,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:35,892 INFO L387 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 [2021-12-22 00:05:36,136 INFO L387 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 [2021-12-22 00:05:36,140 INFO L387 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 [2021-12-22 00:05:36,206 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:36,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-22 00:05:36,218 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:36,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-22 00:05:36,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:05:36,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:05:36,337 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:36,337 INFO L387 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 20 treesize of output 26 [2021-12-22 00:05:36,350 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:36,350 INFO L387 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 20 treesize of output 26 [2021-12-22 00:05:36,397 INFO L387 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 19 treesize of output 11 [2021-12-22 00:05:36,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:36,595 INFO L353 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-22 00:05:36,596 INFO L387 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 29 treesize of output 28 [2021-12-22 00:05:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:36,802 INFO L387 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 26 treesize of output 28 [2021-12-22 00:05:36,814 INFO L353 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-12-22 00:05:36,814 INFO L387 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 22 treesize of output 24 [2021-12-22 00:05:36,874 INFO L387 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 46 treesize of output 44 [2021-12-22 00:05:36,877 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:36,992 INFO L387 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 46 treesize of output 44 [2021-12-22 00:05:36,996 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:37,052 INFO L387 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 46 treesize of output 44 [2021-12-22 00:05:37,056 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:37,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:37,105 INFO L387 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 39 treesize of output 21 [2021-12-22 00:05:37,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:37,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-22 00:05:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:37,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:37,204 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_706 (Array Int Int)) (v_ArrVal_705 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_705) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_706) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_705 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_705) c_append_~head.base) (+ c_append_~head.offset 4)))))) is different from false [2021-12-22 00:05:37,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:37,619 INFO L387 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 82 treesize of output 83 [2021-12-22 00:05:37,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:37,632 INFO L387 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 83 treesize of output 73 [2021-12-22 00:05:37,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:37,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:37,647 INFO L387 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 103 treesize of output 103 [2021-12-22 00:05:37,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:37,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:37,659 INFO L387 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 152 treesize of output 140 [2021-12-22 00:05:37,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:37,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 230 [2021-12-22 00:05:37,681 INFO L387 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 230 treesize of output 206 [2021-12-22 00:05:37,687 INFO L387 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 206 treesize of output 186 [2021-12-22 00:05:39,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017505891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:39,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:05:39,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-12-22 00:05:39,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580468624] [2021-12-22 00:05:39,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:05:39,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 00:05:39,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:39,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 00:05:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=4, NotChecked=60, Total=1056 [2021-12-22 00:05:39,139 INFO L87 Difference]: Start difference. First operand 476 states and 643 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:40,562 INFO L93 Difference]: Finished difference Result 515 states and 692 transitions. [2021-12-22 00:05:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 00:05:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-12-22 00:05:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:40,565 INFO L225 Difference]: With dead ends: 515 [2021-12-22 00:05:40,565 INFO L226 Difference]: Without dead ends: 515 [2021-12-22 00:05:40,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=190, Invalid=1616, Unknown=4, NotChecked=82, Total=1892 [2021-12-22 00:05:40,566 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 61 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 3692 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 715 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:40,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 3692 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2047 Invalid, 0 Unknown, 715 Unchecked, 0.8s Time] [2021-12-22 00:05:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-22 00:05:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 493. [2021-12-22 00:05:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 351 states have (on average 1.735042735042735) internal successors, (609), 470 states have internal predecessors, (609), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (38), 18 states have call predecessors, (38), 20 states have call successors, (38) [2021-12-22 00:05:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 667 transitions. [2021-12-22 00:05:40,575 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 667 transitions. Word has length 39 [2021-12-22 00:05:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:40,575 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 667 transitions. [2021-12-22 00:05:40,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 667 transitions. [2021-12-22 00:05:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 00:05:40,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:40,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:40,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:05:40,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:40,791 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash -568836632, now seen corresponding path program 1 times [2021-12-22 00:05:40,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:40,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629434983] [2021-12-22 00:05:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:40,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:40,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:05:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:41,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629434983] [2021-12-22 00:05:41,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629434983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317502685] [2021-12-22 00:05:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:41,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:41,051 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) [2021-12-22 00:05:41,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 00:05:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 00:05:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:41,176 INFO L387 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 [2021-12-22 00:05:41,341 INFO L387 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 [2021-12-22 00:05:41,373 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:41,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-22 00:05:41,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:05:41,421 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:41,421 INFO L387 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 20 treesize of output 26 [2021-12-22 00:05:41,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:41,487 INFO L353 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-22 00:05:41,487 INFO L387 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 29 treesize of output 28 [2021-12-22 00:05:41,592 INFO L353 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-12-22 00:05:41,593 INFO L387 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 28 treesize of output 45 [2021-12-22 00:05:41,646 INFO L387 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 38 treesize of output 36 [2021-12-22 00:05:41,761 INFO L387 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 38 treesize of output 36 [2021-12-22 00:05:41,810 INFO L387 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 38 treesize of output 36 [2021-12-22 00:05:41,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:41,848 INFO L387 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 31 treesize of output 13 [2021-12-22 00:05:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:41,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:42,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:42,204 INFO L387 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 33 treesize of output 34 [2021-12-22 00:05:42,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:42,210 INFO L387 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 170 treesize of output 122 [2021-12-22 00:05:42,213 INFO L387 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 44 treesize of output 40 [2021-12-22 00:05:42,216 INFO L387 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 82 treesize of output 74 [2021-12-22 00:05:43,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317502685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:43,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:05:43,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-12-22 00:05:43,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141590749] [2021-12-22 00:05:43,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:05:43,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 00:05:43,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:43,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 00:05:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1057, Unknown=13, NotChecked=0, Total=1190 [2021-12-22 00:05:43,363 INFO L87 Difference]: Start difference. First operand 493 states and 667 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:44,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:44,591 INFO L93 Difference]: Finished difference Result 658 states and 746 transitions. [2021-12-22 00:05:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 00:05:44,592 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-12-22 00:05:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:44,594 INFO L225 Difference]: With dead ends: 658 [2021-12-22 00:05:44,594 INFO L226 Difference]: Without dead ends: 658 [2021-12-22 00:05:44,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=1695, Unknown=13, NotChecked=0, Total=1980 [2021-12-22 00:05:44,595 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1109 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:44,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 2256 Invalid, 2534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1790 Invalid, 0 Unknown, 582 Unchecked, 0.8s Time] [2021-12-22 00:05:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-22 00:05:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 491. [2021-12-22 00:05:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 349 states have (on average 1.7220630372492836) internal successors, (601), 468 states have internal predecessors, (601), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (38), 18 states have call predecessors, (38), 20 states have call successors, (38) [2021-12-22 00:05:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 659 transitions. [2021-12-22 00:05:44,606 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 659 transitions. Word has length 39 [2021-12-22 00:05:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:44,607 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 659 transitions. [2021-12-22 00:05:44,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 659 transitions. [2021-12-22 00:05:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 00:05:44,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:44,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:44,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 00:05:44,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:44,817 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1220540201, now seen corresponding path program 1 times [2021-12-22 00:05:44,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:44,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223450214] [2021-12-22 00:05:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:44,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:44,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:05:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:45,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223450214] [2021-12-22 00:05:45,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223450214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093561407] [2021-12-22 00:05:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:45,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:45,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:45,104 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) [2021-12-22 00:05:45,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 00:05:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 00:05:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:45,262 INFO L387 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 [2021-12-22 00:05:45,419 INFO L387 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 [2021-12-22 00:05:45,456 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-22 00:05:45,456 INFO L387 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 [2021-12-22 00:05:45,491 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:45,491 INFO L387 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 23 treesize of output 27 [2021-12-22 00:05:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:45,504 INFO L387 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 13 treesize of output 7 [2021-12-22 00:05:45,545 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:05:45,545 INFO L387 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 28 treesize of output 32 [2021-12-22 00:05:45,624 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-22 00:05:45,624 INFO L387 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 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 00:05:45,698 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:05:45,698 INFO L387 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 [2021-12-22 00:05:45,726 INFO L387 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 34 treesize of output 30 [2021-12-22 00:05:45,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:45,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-12-22 00:05:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:05:45,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:45,800 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1074 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1074) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2021-12-22 00:05:45,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_37 Int) (v_ArrVal_1074 (Array Int Int))) (or (not (= (select |c_#valid| v_append_~node~0.base_37) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_37 v_ArrVal_1074) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)))) is different from false [2021-12-22 00:05:45,817 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_37 Int) (v_ArrVal_1074 (Array Int Int))) (or (not (= (select |c_#valid| v_append_~node~0.base_37) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_37 v_ArrVal_1074) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)))) is different from false [2021-12-22 00:05:45,898 INFO L353 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-22 00:05:45,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-12-22 00:05:45,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:45,903 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-22 00:05:45,903 INFO L387 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 72 treesize of output 34 [2021-12-22 00:05:45,905 INFO L387 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 20 treesize of output 18 [2021-12-22 00:05:45,910 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:05:45,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-22 00:05:46,063 INFO L353 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-22 00:05:46,063 INFO L387 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 2 case distinctions, treesize of input 27 treesize of output 33 [2021-12-22 00:05:46,082 INFO L353 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2021-12-22 00:05:46,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 147 [2021-12-22 00:05:46,099 INFO L387 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 114 treesize of output 110 [2021-12-22 00:05:46,102 INFO L387 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 110 treesize of output 102 [2021-12-22 00:05:46,388 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:05:46,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-22 00:05:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-22 00:05:46,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093561407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:05:46,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:05:46,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 37 [2021-12-22 00:05:46,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878793969] [2021-12-22 00:05:46,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:05:46,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 00:05:46,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 00:05:46,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=965, Unknown=6, NotChecked=198, Total=1332 [2021-12-22 00:05:46,489 INFO L87 Difference]: Start difference. First operand 491 states and 659 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 31 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:05:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:48,048 INFO L93 Difference]: Finished difference Result 616 states and 670 transitions. [2021-12-22 00:05:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 00:05:48,049 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 31 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-12-22 00:05:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:48,051 INFO L225 Difference]: With dead ends: 616 [2021-12-22 00:05:48,051 INFO L226 Difference]: Without dead ends: 616 [2021-12-22 00:05:48,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=1945, Unknown=11, NotChecked=288, Total=2652 [2021-12-22 00:05:48,052 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 628 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 4034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1409 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:48,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 2758 Invalid, 4034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2492 Invalid, 0 Unknown, 1409 Unchecked, 1.0s Time] [2021-12-22 00:05:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-12-22 00:05:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 464. [2021-12-22 00:05:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 323 states have (on average 1.743034055727554) internal successors, (563), 441 states have internal predecessors, (563), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 00:05:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 603 transitions. [2021-12-22 00:05:48,061 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 603 transitions. Word has length 39 [2021-12-22 00:05:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:48,061 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 603 transitions. [2021-12-22 00:05:48,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 31 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:05:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 603 transitions. [2021-12-22 00:05:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 00:05:48,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:48,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:48,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 00:05:48,267 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,SelfDestructingSolverStorable12 [2021-12-22 00:05:48,267 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:48,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1913380289, now seen corresponding path program 1 times [2021-12-22 00:05:48,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:48,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375313640] [2021-12-22 00:05:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:48,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:48,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:05:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:48,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 00:05:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:05:48,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375313640] [2021-12-22 00:05:48,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375313640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105452995] [2021-12-22 00:05:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:48,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:48,522 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) [2021-12-22 00:05:48,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 00:05:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:48,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 00:05:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:48,712 INFO L387 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 [2021-12-22 00:05:48,958 INFO L387 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 [2021-12-22 00:05:48,961 INFO L387 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 [2021-12-22 00:05:49,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:49,108 INFO L387 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 26 treesize of output 28 [2021-12-22 00:05:49,118 INFO L353 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-22 00:05:49,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 00:05:49,157 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:49,160 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:49,246 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:49,250 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:49,281 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:49,285 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:49,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:49,324 INFO L387 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 29 treesize of output 17 [2021-12-22 00:05:49,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:49,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:49,340 INFO L387 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 32 treesize of output 17 [2021-12-22 00:05:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:05:49,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:49,409 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1353 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1353) c_append_~head.base) (+ c_append_~head.offset 4))))) (forall ((v_ArrVal_1354 (Array Int Int)) (v_ArrVal_1353 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1353) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1354) c_append_~head.base) .cse0)))))) is different from false [2021-12-22 00:05:49,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:49,636 INFO L387 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 73 treesize of output 74 [2021-12-22 00:05:49,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:49,642 INFO L387 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 74 treesize of output 64 [2021-12-22 00:05:49,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:49,651 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-22 00:05:49,652 INFO L387 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 61 treesize of output 52 [2021-12-22 00:05:49,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:49,659 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:05:49,659 INFO L387 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 46 treesize of output 28 [2021-12-22 00:05:49,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:49,666 INFO L387 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 48 treesize of output 52 [2021-12-22 00:05:49,671 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:05:49,671 INFO L387 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 25 treesize of output 24 [2021-12-22 00:05:49,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:49,903 INFO L387 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 73 treesize of output 74 [2021-12-22 00:05:49,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:49,907 INFO L387 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 74 treesize of output 64 [2021-12-22 00:05:49,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:49,914 INFO L387 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 94 treesize of output 97 [2021-12-22 00:05:49,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:49,924 INFO L387 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 159 treesize of output 150 [2021-12-22 00:05:49,929 INFO L387 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 111 treesize of output 103 [2021-12-22 00:05:49,932 INFO L387 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 103 treesize of output 95 [2021-12-22 00:05:49,935 INFO L387 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 95 treesize of output 91 [2021-12-22 00:05:50,315 INFO L387 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 73 treesize of output 69 [2021-12-22 00:05:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 9 not checked. [2021-12-22 00:05:50,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105452995] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:05:50,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:05:50,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-12-22 00:05:50,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865256382] [2021-12-22 00:05:50,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:05:50,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-22 00:05:50,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-22 00:05:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=4, NotChecked=56, Total=930 [2021-12-22 00:05:50,879 INFO L87 Difference]: Start difference. First operand 464 states and 603 transitions. Second operand has 31 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 00:05:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:51,930 INFO L93 Difference]: Finished difference Result 496 states and 633 transitions. [2021-12-22 00:05:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 00:05:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2021-12-22 00:05:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:51,934 INFO L225 Difference]: With dead ends: 496 [2021-12-22 00:05:51,934 INFO L226 Difference]: Without dead ends: 496 [2021-12-22 00:05:51,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=4, NotChecked=86, Total=2070 [2021-12-22 00:05:51,935 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 96 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 934 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:51,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 2610 Invalid, 2042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1082 Invalid, 0 Unknown, 934 Unchecked, 0.5s Time] [2021-12-22 00:05:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-22 00:05:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 462. [2021-12-22 00:05:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 323 states have (on average 1.743034055727554) internal successors, (563), 440 states have internal predecessors, (563), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 00:05:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 599 transitions. [2021-12-22 00:05:51,941 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 599 transitions. Word has length 54 [2021-12-22 00:05:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:51,942 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 599 transitions. [2021-12-22 00:05:51,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 00:05:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 599 transitions. [2021-12-22 00:05:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 00:05:51,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:51,942 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:51,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 00:05:52,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:52,161 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1392743212, now seen corresponding path program 1 times [2021-12-22 00:05:52,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:52,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133390552] [2021-12-22 00:05:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:52,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:52,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:05:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:52,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 00:05:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:52,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 00:05:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 00:05:52,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:52,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133390552] [2021-12-22 00:05:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133390552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057724843] [2021-12-22 00:05:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:52,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:52,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:52,468 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) [2021-12-22 00:05:52,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 00:05:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 00:05:52,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:52,724 INFO L387 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 [2021-12-22 00:05:52,880 INFO L387 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 [2021-12-22 00:05:52,882 INFO L387 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 [2021-12-22 00:05:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:52,981 INFO L387 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 26 treesize of output 28 [2021-12-22 00:05:52,991 INFO L353 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-22 00:05:52,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 00:05:53,045 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:53,047 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:53,154 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:53,163 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:53,199 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:53,202 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:53,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:53,236 INFO L387 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 29 treesize of output 17 [2021-12-22 00:05:53,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:53,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:53,240 INFO L387 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 32 treesize of output 17 [2021-12-22 00:05:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 00:05:53,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:53,300 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1728 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1728) c_append_~head.base) (+ c_append_~head.offset 4)) 5))) (forall ((v_ArrVal_1728 (Array Int Int)) (v_ArrVal_1727 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1728) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1727) c_append_~head.base) .cse0)))))) is different from false [2021-12-22 00:05:53,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:53,695 INFO L387 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 73 treesize of output 74 [2021-12-22 00:05:53,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:53,701 INFO L387 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 74 treesize of output 64 [2021-12-22 00:05:53,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:53,709 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-22 00:05:53,710 INFO L387 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 61 treesize of output 52 [2021-12-22 00:05:53,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:53,716 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:05:53,716 INFO L387 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 46 treesize of output 28 [2021-12-22 00:05:53,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:53,725 INFO L387 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 48 treesize of output 52 [2021-12-22 00:05:53,731 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:05:53,731 INFO L387 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 25 treesize of output 24 [2021-12-22 00:05:53,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:53,990 INFO L387 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 73 treesize of output 74 [2021-12-22 00:05:53,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:53,994 INFO L387 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 74 treesize of output 64 [2021-12-22 00:05:54,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:54,003 INFO L387 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 94 treesize of output 97 [2021-12-22 00:05:54,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:54,012 INFO L387 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 159 treesize of output 150 [2021-12-22 00:05:54,018 INFO L387 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 111 treesize of output 103 [2021-12-22 00:05:54,023 INFO L387 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 103 treesize of output 95 [2021-12-22 00:05:54,028 INFO L387 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 95 treesize of output 91 [2021-12-22 00:05:54,476 INFO L387 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 73 treesize of output 69 [2021-12-22 00:05:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 7 not checked. [2021-12-22 00:05:55,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057724843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:05:55,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:05:55,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-12-22 00:05:55,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274001239] [2021-12-22 00:05:55,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:05:55,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 00:05:55,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:05:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 00:05:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=938, Unknown=1, NotChecked=62, Total=1122 [2021-12-22 00:05:55,117 INFO L87 Difference]: Start difference. First operand 462 states and 599 transitions. Second operand has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 00:05:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:56,749 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2021-12-22 00:05:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 00:05:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2021-12-22 00:05:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:56,754 INFO L225 Difference]: With dead ends: 617 [2021-12-22 00:05:56,754 INFO L226 Difference]: Without dead ends: 617 [2021-12-22 00:05:56,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=1521, Unknown=1, NotChecked=82, Total=1892 [2021-12-22 00:05:56,755 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 587 mSDsluCounter, 2397 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 2546 SdHoareTripleChecker+Invalid, 3976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1403 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:56,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 2546 Invalid, 3976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2506 Invalid, 0 Unknown, 1403 Unchecked, 1.2s Time] [2021-12-22 00:05:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-22 00:05:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 478. [2021-12-22 00:05:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 338 states have (on average 1.7100591715976332) internal successors, (578), 455 states have internal predecessors, (578), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 00:05:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 614 transitions. [2021-12-22 00:05:56,762 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 614 transitions. Word has length 71 [2021-12-22 00:05:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:56,762 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 614 transitions. [2021-12-22 00:05:56,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 00:05:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 614 transitions. [2021-12-22 00:05:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-22 00:05:56,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:56,763 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:56,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 00:05:56,980 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 [2021-12-22 00:05:56,980 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:05:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 358204681, now seen corresponding path program 1 times [2021-12-22 00:05:56,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:05:56,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107424640] [2021-12-22 00:05:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:56,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:05:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:57,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:05:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 00:05:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:57,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 00:05:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 00:05:57,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:05:57,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107424640] [2021-12-22 00:05:57,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107424640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:57,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213034057] [2021-12-22 00:05:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:57,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:05:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:05:57,262 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) [2021-12-22 00:05:57,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 00:05:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:57,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 00:05:57,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:57,524 INFO L387 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 [2021-12-22 00:05:57,711 INFO L387 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 [2021-12-22 00:05:57,714 INFO L387 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 [2021-12-22 00:05:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:57,853 INFO L387 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 26 treesize of output 28 [2021-12-22 00:05:57,863 INFO L353 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-22 00:05:57,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 00:05:57,900 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:57,905 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:58,035 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:58,040 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:58,072 INFO L387 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 36 treesize of output 36 [2021-12-22 00:05:58,075 INFO L387 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 35 treesize of output 35 [2021-12-22 00:05:58,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:58,110 INFO L387 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 29 treesize of output 17 [2021-12-22 00:05:58,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:58,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:58,114 INFO L387 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 32 treesize of output 17 [2021-12-22 00:05:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 00:05:58,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:58,189 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2103 (Array Int Int)) (v_ArrVal_2102 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2102) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2103) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_2102 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2102) c_append_~head.base) (+ c_append_~head.offset 4)))))) is different from false [2021-12-22 00:05:58,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:58,964 INFO L387 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 73 treesize of output 74 [2021-12-22 00:05:58,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:58,972 INFO L387 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 74 treesize of output 64 [2021-12-22 00:05:58,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:58,992 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-22 00:05:58,992 INFO L387 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 61 treesize of output 52 [2021-12-22 00:05:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:05:58,999 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:05:59,000 INFO L387 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 46 treesize of output 28 [2021-12-22 00:05:59,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:59,007 INFO L387 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 48 treesize of output 52 [2021-12-22 00:05:59,012 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:05:59,013 INFO L387 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 25 treesize of output 24 [2021-12-22 00:05:59,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:59,264 INFO L387 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 73 treesize of output 74 [2021-12-22 00:05:59,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:59,269 INFO L387 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 74 treesize of output 64 [2021-12-22 00:05:59,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:59,277 INFO L387 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 94 treesize of output 97 [2021-12-22 00:05:59,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:05:59,287 INFO L387 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 159 treesize of output 150 [2021-12-22 00:05:59,293 INFO L387 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 111 treesize of output 103 [2021-12-22 00:05:59,297 INFO L387 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 103 treesize of output 95 [2021-12-22 00:05:59,301 INFO L387 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 95 treesize of output 91 [2021-12-22 00:05:59,740 INFO L387 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 73 treesize of output 69 [2021-12-22 00:06:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 7 not checked. [2021-12-22 00:06:00,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213034057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:06:00,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:06:00,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2021-12-22 00:06:00,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151016324] [2021-12-22 00:06:00,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:06:00,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 00:06:00,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 00:06:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=894, Unknown=1, NotChecked=60, Total=1056 [2021-12-22 00:06:00,408 INFO L87 Difference]: Start difference. First operand 478 states and 614 transitions. Second operand has 33 states, 32 states have (on average 4.1875) internal successors, (134), 29 states have internal predecessors, (134), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 00:06:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:01,637 INFO L93 Difference]: Finished difference Result 511 states and 646 transitions. [2021-12-22 00:06:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 00:06:01,647 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.1875) internal successors, (134), 29 states have internal predecessors, (134), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-12-22 00:06:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:01,650 INFO L225 Difference]: With dead ends: 511 [2021-12-22 00:06:01,650 INFO L226 Difference]: Without dead ends: 511 [2021-12-22 00:06:01,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=1667, Unknown=1, NotChecked=86, Total=2070 [2021-12-22 00:06:01,651 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 122 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1222 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:01,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 2924 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1213 Invalid, 0 Unknown, 1222 Unchecked, 0.6s Time] [2021-12-22 00:06:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-12-22 00:06:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 452. [2021-12-22 00:06:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 315 states have (on average 1.7492063492063492) internal successors, (551), 432 states have internal predecessors, (551), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 00:06:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 583 transitions. [2021-12-22 00:06:01,662 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 583 transitions. Word has length 81 [2021-12-22 00:06:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:01,662 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 583 transitions. [2021-12-22 00:06:01,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.1875) internal successors, (134), 29 states have internal predecessors, (134), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 00:06:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 583 transitions. [2021-12-22 00:06:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 00:06:01,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:01,663 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:06:01,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 00:06:01,875 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 [2021-12-22 00:06:01,875 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:06:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:01,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1693525601, now seen corresponding path program 1 times [2021-12-22 00:06:01,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:01,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517329527] [2021-12-22 00:06:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:01,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:02,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:06:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:02,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 00:06:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:02,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 00:06:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:02,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 00:06:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 64 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 00:06:02,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:02,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517329527] [2021-12-22 00:06:02,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517329527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:06:02,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709808257] [2021-12-22 00:06:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:02,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:06:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:06:02,239 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) [2021-12-22 00:06:02,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 00:06:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:02,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 00:06:02,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:06:02,567 INFO L387 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 [2021-12-22 00:06:02,725 INFO L387 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 [2021-12-22 00:06:02,727 INFO L387 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 [2021-12-22 00:06:02,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:06:02,843 INFO L387 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 26 treesize of output 28 [2021-12-22 00:06:02,854 INFO L353 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-22 00:06:02,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 00:06:02,893 INFO L387 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 36 treesize of output 36 [2021-12-22 00:06:02,895 INFO L387 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 35 treesize of output 35 [2021-12-22 00:06:03,021 INFO L387 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 36 treesize of output 36 [2021-12-22 00:06:03,024 INFO L387 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 35 treesize of output 35 [2021-12-22 00:06:03,059 INFO L387 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 36 treesize of output 36 [2021-12-22 00:06:03,062 INFO L387 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 35 treesize of output 35 [2021-12-22 00:06:03,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:06:03,099 INFO L387 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 29 treesize of output 17 [2021-12-22 00:06:03,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:06:03,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:03,103 INFO L387 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 32 treesize of output 17 [2021-12-22 00:06:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 68 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 00:06:03,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:06:03,167 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2573 (Array Int Int)) (v_ArrVal_2572 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2573) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2572) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_2573 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2573) c_append_~head.base) (+ c_append_~head.offset 4)))))) is different from false [2021-12-22 00:06:03,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:03,592 INFO L387 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 73 treesize of output 74 [2021-12-22 00:06:03,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:03,598 INFO L387 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 74 treesize of output 64 [2021-12-22 00:06:03,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:06:03,606 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-22 00:06:03,606 INFO L387 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 61 treesize of output 52 [2021-12-22 00:06:03,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:06:03,617 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:06:03,617 INFO L387 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 46 treesize of output 28 [2021-12-22 00:06:03,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:03,624 INFO L387 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 48 treesize of output 52 [2021-12-22 00:06:03,630 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:06:03,630 INFO L387 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 25 treesize of output 24 [2021-12-22 00:06:03,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:03,847 INFO L387 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 73 treesize of output 74 [2021-12-22 00:06:03,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:03,851 INFO L387 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 74 treesize of output 64 [2021-12-22 00:06:03,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:03,858 INFO L387 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 94 treesize of output 97 [2021-12-22 00:06:03,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:03,867 INFO L387 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 159 treesize of output 150 [2021-12-22 00:06:03,872 INFO L387 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 111 treesize of output 103 [2021-12-22 00:06:03,876 INFO L387 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 103 treesize of output 95 [2021-12-22 00:06:03,879 INFO L387 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 95 treesize of output 91 [2021-12-22 00:06:04,293 INFO L387 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 73 treesize of output 69 [2021-12-22 00:06:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 7 not checked. [2021-12-22 00:06:04,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709808257] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:06:04,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:06:04,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-12-22 00:06:04,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464162445] [2021-12-22 00:06:04,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:06:04,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 00:06:04,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 00:06:04,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=942, Unknown=1, NotChecked=62, Total=1122 [2021-12-22 00:06:04,951 INFO L87 Difference]: Start difference. First operand 452 states and 583 transitions. Second operand has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 00:06:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:05,686 INFO L93 Difference]: Finished difference Result 465 states and 596 transitions. [2021-12-22 00:06:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 00:06:05,686 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2021-12-22 00:06:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:05,688 INFO L225 Difference]: With dead ends: 465 [2021-12-22 00:06:05,688 INFO L226 Difference]: Without dead ends: 465 [2021-12-22 00:06:05,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=1483, Unknown=1, NotChecked=80, Total=1806 [2021-12-22 00:06:05,689 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 338 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:05,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 2375 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 878 Invalid, 0 Unknown, 1199 Unchecked, 0.4s Time] [2021-12-22 00:06:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-22 00:06:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 464. [2021-12-22 00:06:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 327 states have (on average 1.7217125382262997) internal successors, (563), 443 states have internal predecessors, (563), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 00:06:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 595 transitions. [2021-12-22 00:06:05,709 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 595 transitions. Word has length 88 [2021-12-22 00:06:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:05,710 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 595 transitions. [2021-12-22 00:06:05,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 00:06:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 595 transitions. [2021-12-22 00:06:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-22 00:06:05,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:05,711 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-12-22 00:06:05,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 00:06:05,927 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 [2021-12-22 00:06:05,927 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:06:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1694546100, now seen corresponding path program 1 times [2021-12-22 00:06:05,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:05,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626863897] [2021-12-22 00:06:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:05,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:06,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:06:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 00:06:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 00:06:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 00:06:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:06,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 00:06:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 90 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 00:06:06,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:06,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626863897] [2021-12-22 00:06:06,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626863897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:06:06,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76755319] [2021-12-22 00:06:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:06,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:06:06,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:06:06,259 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) [2021-12-22 00:06:06,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 00:06:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:06,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 00:06:06,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:06:06,643 INFO L387 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 [2021-12-22 00:06:06,810 INFO L387 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 [2021-12-22 00:06:06,814 INFO L387 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 [2021-12-22 00:06:06,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:06:06,917 INFO L387 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 26 treesize of output 28 [2021-12-22 00:06:06,927 INFO L353 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-22 00:06:06,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 00:06:06,961 INFO L387 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 36 treesize of output 36 [2021-12-22 00:06:06,963 INFO L387 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 35 treesize of output 35 [2021-12-22 00:06:07,064 INFO L387 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 36 treesize of output 36 [2021-12-22 00:06:07,076 INFO L387 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 35 treesize of output 35 [2021-12-22 00:06:07,108 INFO L387 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 36 treesize of output 36 [2021-12-22 00:06:07,112 INFO L387 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 35 treesize of output 35 [2021-12-22 00:06:07,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:06:07,153 INFO L387 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 29 treesize of output 17 [2021-12-22 00:06:07,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:06:07,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:07,158 INFO L387 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 32 treesize of output 17 [2021-12-22 00:06:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 95 proven. 11 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 00:06:07,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:06:07,217 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3137 (Array Int Int)) (v_ArrVal_3138 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3138) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_3137) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_3138 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3138) c_append_~head.base) (+ c_append_~head.offset 4)))))) is different from false [2021-12-22 00:06:07,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:07,630 INFO L387 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 73 treesize of output 74 [2021-12-22 00:06:07,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:07,635 INFO L387 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 74 treesize of output 64 [2021-12-22 00:06:07,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:06:07,646 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-22 00:06:07,646 INFO L387 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 61 treesize of output 52 [2021-12-22 00:06:07,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:06:07,653 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:06:07,654 INFO L387 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 46 treesize of output 28 [2021-12-22 00:06:07,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:07,660 INFO L387 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 48 treesize of output 52 [2021-12-22 00:06:07,665 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:06:07,665 INFO L387 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 25 treesize of output 24 [2021-12-22 00:06:07,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:07,887 INFO L387 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 73 treesize of output 74 [2021-12-22 00:06:07,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:07,891 INFO L387 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 74 treesize of output 64 [2021-12-22 00:06:07,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:07,898 INFO L387 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 94 treesize of output 97 [2021-12-22 00:06:07,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:06:07,908 INFO L387 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 159 treesize of output 150 [2021-12-22 00:06:07,913 INFO L387 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 111 treesize of output 103 [2021-12-22 00:06:07,916 INFO L387 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 103 treesize of output 95 [2021-12-22 00:06:07,920 INFO L387 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 95 treesize of output 91 [2021-12-22 00:06:08,315 INFO L387 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 73 treesize of output 69 [2021-12-22 00:06:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 76 trivial. 7 not checked. [2021-12-22 00:06:08,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76755319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:06:08,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:06:08,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-12-22 00:06:08,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211879241] [2021-12-22 00:06:08,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:06:08,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 00:06:08,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 00:06:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=937, Unknown=2, NotChecked=62, Total=1122 [2021-12-22 00:06:08,938 INFO L87 Difference]: Start difference. First operand 464 states and 595 transitions. Second operand has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 00:06:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:10,478 INFO L93 Difference]: Finished difference Result 636 states and 684 transitions. [2021-12-22 00:06:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 00:06:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-12-22 00:06:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:10,481 INFO L225 Difference]: With dead ends: 636 [2021-12-22 00:06:10,481 INFO L226 Difference]: Without dead ends: 636 [2021-12-22 00:06:10,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=1450, Unknown=2, NotChecked=80, Total=1806 [2021-12-22 00:06:10,481 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 820 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 2814 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 4474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1584 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:10,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 2733 Invalid, 4474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2814 Invalid, 0 Unknown, 1584 Unchecked, 1.2s Time] [2021-12-22 00:06:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-12-22 00:06:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 451. [2021-12-22 00:06:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 315 states have (on average 1.746031746031746) internal successors, (550), 431 states have internal predecessors, (550), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 00:06:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 582 transitions. [2021-12-22 00:06:10,488 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 582 transitions. Word has length 105 [2021-12-22 00:06:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:10,488 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 582 transitions. [2021-12-22 00:06:10,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 4.066666666666666) internal successors, (122), 27 states have internal predecessors, (122), 5 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 00:06:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 582 transitions. [2021-12-22 00:06:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-22 00:06:10,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:10,490 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:06:10,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 00:06:10,703 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 [2021-12-22 00:06:10,703 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-22 00:06:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash -365002613, now seen corresponding path program 1 times [2021-12-22 00:06:10,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:10,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282634414] [2021-12-22 00:06:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:10,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:12,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 00:06:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:12,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 00:06:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:13,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 00:06:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 00:06:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 00:06:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 00:06:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:14,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 00:06:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:14,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 00:06:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:15,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-22 00:06:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:15,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 00:06:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:15,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-22 00:06:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-22 00:06:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:16,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-22 00:06:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:16,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2021-12-22 00:06:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2021-12-22 00:06:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 76 proven. 942 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-12-22 00:06:17,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:17,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282634414] [2021-12-22 00:06:17,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282634414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:06:17,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416898768] [2021-12-22 00:06:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:17,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:06:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:06:17,500 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) [2021-12-22 00:06:17,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process