./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/brs2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc354f47e1cc26b26f82415b2113a1e937a24cebf9ecb225fe7f6242be1c8136 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 01:20:54,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 01:20:54,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 01:20:54,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 01:20:54,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 01:20:54,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 01:20:54,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 01:20:54,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 01:20:54,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 01:20:54,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 01:20:54,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 01:20:54,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 01:20:54,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 01:20:54,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 01:20:54,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 01:20:54,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 01:20:54,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 01:20:54,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 01:20:54,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 01:20:54,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 01:20:54,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 01:20:54,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 01:20:54,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 01:20:54,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 01:20:54,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 01:20:54,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 01:20:54,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 01:20:54,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 01:20:54,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 01:20:54,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 01:20:54,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 01:20:54,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 01:20:54,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 01:20:54,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 01:20:54,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 01:20:54,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 01:20:54,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 01:20:54,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 01:20:54,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 01:20:54,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 01:20:54,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 01:20:54,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 01:20:54,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 01:20:54,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 01:20:54,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 01:20:54,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 01:20:54,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 01:20:54,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 01:20:54,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 01:20:54,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 01:20:54,551 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 01:20:54,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 01:20:54,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 01:20:54,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 01:20:54,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 01:20:54,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 01:20:54,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 01:20:54,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 01:20:54,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 01:20:54,554 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 01:20:54,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 01:20:54,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 01:20:54,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 01:20:54,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 01:20:54,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 01:20:54,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 01:20:54,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:20:54,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 01:20:54,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 01:20:54,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 01:20:54,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 01:20:54,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 01:20:54,556 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 01:20:54,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 01:20:54,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 01:20:54,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 01:20:54,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc354f47e1cc26b26f82415b2113a1e937a24cebf9ecb225fe7f6242be1c8136 [2021-12-17 01:20:54,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 01:20:54,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 01:20:54,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 01:20:54,804 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 01:20:54,806 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 01:20:54,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs2.c [2021-12-17 01:20:54,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7020bb17/159389fc623e4f73ac10b4b5a8777bd4/FLAG52d4162de [2021-12-17 01:20:55,260 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 01:20:55,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs2.c [2021-12-17 01:20:55,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7020bb17/159389fc623e4f73ac10b4b5a8777bd4/FLAG52d4162de [2021-12-17 01:20:55,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7020bb17/159389fc623e4f73ac10b4b5a8777bd4 [2021-12-17 01:20:55,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 01:20:55,280 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 01:20:55,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 01:20:55,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 01:20:55,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 01:20:55,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a91e11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55, skipping insertion in model container [2021-12-17 01:20:55,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 01:20:55,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 01:20:55,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-12-17 01:20:55,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:20:55,451 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 01:20:55,461 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-12-17 01:20:55,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:20:55,477 INFO L208 MainTranslator]: Completed translation [2021-12-17 01:20:55,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55 WrapperNode [2021-12-17 01:20:55,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 01:20:55,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 01:20:55,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 01:20:55,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 01:20:55,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,504 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-12-17 01:20:55,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 01:20:55,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 01:20:55,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 01:20:55,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 01:20:55,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 01:20:55,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 01:20:55,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 01:20:55,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 01:20:55,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (1/1) ... [2021-12-17 01:20:55,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:20:55,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:20:55,552 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) [2021-12-17 01:20:55,560 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 [2021-12-17 01:20:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 01:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 01:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 01:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 01:20:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 01:20:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 01:20:55,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 01:20:55,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 01:20:55,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 01:20:55,646 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 01:20:55,648 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 01:20:55,751 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 01:20:55,756 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 01:20:55,756 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 01:20:55,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:20:55 BoogieIcfgContainer [2021-12-17 01:20:55,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 01:20:55,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 01:20:55,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 01:20:55,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 01:20:55,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:20:55" (1/3) ... [2021-12-17 01:20:55,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620b6980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:20:55, skipping insertion in model container [2021-12-17 01:20:55,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:20:55" (2/3) ... [2021-12-17 01:20:55,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620b6980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:20:55, skipping insertion in model container [2021-12-17 01:20:55,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:20:55" (3/3) ... [2021-12-17 01:20:55,764 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2.c [2021-12-17 01:20:55,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 01:20:55,768 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 01:20:55,818 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 01:20:55,837 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-12-17 01:20:55,838 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 01:20:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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) [2021-12-17 01:20:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 01:20:55,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:20:55,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:20:55,872 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:20:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:20:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-12-17 01:20:55,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:20:55,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494715587] [2021-12-17 01:20:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:20:55,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:20:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:20:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:20:56,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:20:56,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494715587] [2021-12-17 01:20:56,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494715587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:20:56,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:20:56,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 01:20:56,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339478447] [2021-12-17 01:20:56,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:20:56,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 01:20:56,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:20:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 01:20:56,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:20:56,138 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-17 01:20:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:20:56,155 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-17 01:20:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 01:20:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-12-17 01:20:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:20:56,164 INFO L225 Difference]: With dead ends: 36 [2021-12-17 01:20:56,165 INFO L226 Difference]: Without dead ends: 16 [2021-12-17 01:20:56,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:20:56,172 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:20:56,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:20:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-17 01:20:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-17 01:20:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-12-17 01:20:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-17 01:20:56,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-12-17 01:20:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:20:56,204 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-17 01:20:56,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-17 01:20:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-17 01:20:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 01:20:56,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:20:56,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:20:56,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 01:20:56,207 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:20:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:20:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-12-17 01:20:56,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:20:56,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528583436] [2021-12-17 01:20:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:20:56,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:20:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:20:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:20:56,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:20:56,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528583436] [2021-12-17 01:20:56,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528583436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:20:56,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:20:56,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 01:20:56,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537120533] [2021-12-17 01:20:56,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:20:56,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 01:20:56,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:20:56,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 01:20:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 01:20:56,301 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-17 01:20:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:20:56,347 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-12-17 01:20:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 01:20:56,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-12-17 01:20:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:20:56,349 INFO L225 Difference]: With dead ends: 33 [2021-12-17 01:20:56,349 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 01:20:56,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 01:20:56,355 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:20:56,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:20:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 01:20:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-17 01:20:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-12-17 01:20:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-17 01:20:56,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-12-17 01:20:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:20:56,368 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-17 01:20:56,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-17 01:20:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-17 01:20:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 01:20:56,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:20:56,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:20:56,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 01:20:56,373 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:20:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:20:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-12-17 01:20:56,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:20:56,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370692239] [2021-12-17 01:20:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:20:56,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:20:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:20:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:20:56,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:20:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370692239] [2021-12-17 01:20:56,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370692239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:20:56,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:20:56,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 01:20:56,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459497946] [2021-12-17 01:20:56,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:20:56,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 01:20:56,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:20:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 01:20:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 01:20:56,517 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-17 01:20:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:20:56,581 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-17 01:20:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 01:20:56,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2021-12-17 01:20:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:20:56,596 INFO L225 Difference]: With dead ends: 27 [2021-12-17 01:20:56,596 INFO L226 Difference]: Without dead ends: 23 [2021-12-17 01:20:56,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 01:20:56,598 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:20:56,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:20:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-17 01:20:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-17 01:20:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2021-12-17 01:20:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-17 01:20:56,602 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-12-17 01:20:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:20:56,603 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-17 01:20:56,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-17 01:20:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-17 01:20:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 01:20:56,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:20:56,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:20:56,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 01:20:56,605 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:20:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:20:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-12-17 01:20:56,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:20:56,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841489036] [2021-12-17 01:20:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:20:56,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:20:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:20:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:20:56,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:20:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841489036] [2021-12-17 01:20:56,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841489036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:20:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774545856] [2021-12-17 01:20:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:20:56,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:20:56,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:20:56,718 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) [2021-12-17 01:20:56,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 01:20:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:20:56,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 01:20:56,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:20:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:20:56,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:20:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:20:56,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774545856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:20:56,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:20:56,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-17 01:20:56,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560168442] [2021-12-17 01:20:56,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:20:56,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 01:20:56,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:20:56,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 01:20:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 01:20:56,933 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-12-17 01:20:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:20:57,013 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-17 01:20:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 01:20:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 20 [2021-12-17 01:20:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:20:57,015 INFO L225 Difference]: With dead ends: 43 [2021-12-17 01:20:57,015 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 01:20:57,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-17 01:20:57,016 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:20:57,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:20:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 01:20:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-17 01:20:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2021-12-17 01:20:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-17 01:20:57,021 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2021-12-17 01:20:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:20:57,021 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-17 01:20:57,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-12-17 01:20:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-17 01:20:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 01:20:57,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:20:57,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:20:57,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 01:20:57,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:20:57,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:20:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:20:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-12-17 01:20:57,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:20:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523343590] [2021-12-17 01:20:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:20:57,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:20:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:20:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:20:57,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:20:57,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523343590] [2021-12-17 01:20:57,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523343590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:20:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570266378] [2021-12-17 01:20:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:20:57,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:20:57,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:20:57,732 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) [2021-12-17 01:20:57,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 01:20:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:20:57,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 01:20:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:20:57,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:20:57,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-17 01:20:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-17 01:20:58,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-12-17 01:20:58,216 INFO L388 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 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-17 01:20:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:20:58,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:20:59,359 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_72 Int)) (or (< 0 v_ArrVal_72) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_72)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)) v_ArrVal_72) (* 2 c_~N~0)))) is different from false [2021-12-17 01:21:00,047 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_72 Int)) (or (< 0 v_ArrVal_72) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_72)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) v_ArrVal_72) (* 2 c_~N~0)))) is different from false [2021-12-17 01:21:00,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 210 [2021-12-17 01:21:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-17 01:21:00,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570266378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:21:00,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:21:00,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2021-12-17 01:21:00,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116579625] [2021-12-17 01:21:00,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:21:00,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 01:21:00,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:21:00,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 01:21:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=530, Unknown=2, NotChecked=98, Total=756 [2021-12-17 01:21:00,309 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2021-12-17 01:21:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:21:00,578 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-17 01:21:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 01:21:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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 23 [2021-12-17 01:21:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:21:00,580 INFO L225 Difference]: With dead ends: 56 [2021-12-17 01:21:00,580 INFO L226 Difference]: Without dead ends: 36 [2021-12-17 01:21:00,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=182, Invalid=754, Unknown=2, NotChecked=118, Total=1056 [2021-12-17 01:21:00,581 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:21:00,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 64 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 225 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-12-17 01:21:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-17 01:21:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-12-17 01:21:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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) [2021-12-17 01:21:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-17 01:21:00,586 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2021-12-17 01:21:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:21:00,586 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-17 01:21:00,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2021-12-17 01:21:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-17 01:21:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 01:21:00,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:21:00,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:21:00,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 01:21:00,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:21:00,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:21:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:21:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2021-12-17 01:21:00,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:21:00,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279098901] [2021-12-17 01:21:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:21:00,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:21:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:21:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:21:00,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:21:00,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279098901] [2021-12-17 01:21:00,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279098901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:21:00,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536248590] [2021-12-17 01:21:00,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:21:00,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:21:00,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:21:00,897 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) [2021-12-17 01:21:00,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 01:21:00,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:21:00,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:21:00,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 01:21:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:21:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:21:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:21:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:21:01,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536248590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:21:01,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:21:01,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-17 01:21:01,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10145081] [2021-12-17 01:21:01,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:21:01,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 01:21:01,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:21:01,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 01:21:01,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 01:21:01,101 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-12-17 01:21:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:21:01,222 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-12-17 01:21:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 01:21:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 26 [2021-12-17 01:21:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:21:01,223 INFO L225 Difference]: With dead ends: 68 [2021-12-17 01:21:01,224 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 01:21:01,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-17 01:21:01,225 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:21:01,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 57 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:21:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 01:21:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-12-17 01:21:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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) [2021-12-17 01:21:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-17 01:21:01,231 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2021-12-17 01:21:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:21:01,231 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-17 01:21:01,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-12-17 01:21:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-17 01:21:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 01:21:01,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:21:01,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:21:01,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 01:21:01,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:21:01,456 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:21:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:21:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1507669223, now seen corresponding path program 3 times [2021-12-17 01:21:01,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:21:01,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573092197] [2021-12-17 01:21:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:21:01,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:21:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:21:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:21:02,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:21:02,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573092197] [2021-12-17 01:21:02,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573092197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:21:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614047703] [2021-12-17 01:21:02,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:21:02,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:21:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:21:02,046 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) [2021-12-17 01:21:02,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 01:21:02,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 01:21:02,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:21:02,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 01:21:02,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:21:02,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:21:02,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:21:02,290 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-17 01:21:02,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-17 01:21:02,479 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-17 01:21:02,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-12-17 01:21:02,600 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-12-17 01:21:02,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 56 [2021-12-17 01:21:02,815 INFO L354 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2021-12-17 01:21:02,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 68 [2021-12-17 01:21:03,323 INFO L354 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2021-12-17 01:21:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 21 [2021-12-17 01:21:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 01:21:03,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:21:37,912 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-17 01:21:37,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2627 treesize of output 2545 [2021-12-17 01:21:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 01:21:40,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614047703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:21:40,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:21:40,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 47 [2021-12-17 01:21:40,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209602746] [2021-12-17 01:21:40,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:21:40,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 01:21:40,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:21:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 01:21:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1854, Unknown=17, NotChecked=0, Total=2162 [2021-12-17 01:21:40,724 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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) [2021-12-17 01:22:07,999 WARN L227 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 94 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 01:22:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:22:24,573 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2021-12-17 01:22:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 01:22:24,573 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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 29 [2021-12-17 01:22:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:22:24,575 INFO L225 Difference]: With dead ends: 113 [2021-12-17 01:22:24,575 INFO L226 Difference]: Without dead ends: 106 [2021-12-17 01:22:24,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 78.3s TimeCoverageRelationStatistics Valid=971, Invalid=6137, Unknown=32, NotChecked=0, Total=7140 [2021-12-17 01:22:24,579 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:22:24,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 178 Invalid, 0 Unknown, 228 Unchecked, 0.2s Time] [2021-12-17 01:22:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-17 01:22:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2021-12-17 01:22:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 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) [2021-12-17 01:22:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2021-12-17 01:22:24,590 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 29 [2021-12-17 01:22:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:22:24,591 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2021-12-17 01:22:24,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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) [2021-12-17 01:22:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2021-12-17 01:22:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 01:22:24,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:22:24,592 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:22:24,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 01:22:24,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:22:24,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:22:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:22:24,793 INFO L85 PathProgramCache]: Analyzing trace with hash -904524816, now seen corresponding path program 4 times [2021-12-17 01:22:24,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:22:24,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881723391] [2021-12-17 01:22:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:22:24,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:22:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:22:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:22:24,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:22:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881723391] [2021-12-17 01:22:24,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881723391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:22:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874808529] [2021-12-17 01:22:24,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:22:24,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:22:24,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:22:24,875 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) [2021-12-17 01:22:24,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 01:22:24,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:22:24,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:22:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 01:22:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:22:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:22:25,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:22:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:22:25,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874808529] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:22:25,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:22:25,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-17 01:22:25,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393981116] [2021-12-17 01:22:25,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:22:25,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 01:22:25,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:22:25,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 01:22:25,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-17 01:22:25,127 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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) [2021-12-17 01:22:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:22:25,264 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2021-12-17 01:22:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 01:22:25,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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 32 [2021-12-17 01:22:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:22:25,265 INFO L225 Difference]: With dead ends: 165 [2021-12-17 01:22:25,265 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 01:22:25,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-12-17 01:22:25,267 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:22:25,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 46 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:22:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 01:22:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-12-17 01:22:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 99 states have internal predecessors, (122), 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) [2021-12-17 01:22:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2021-12-17 01:22:25,278 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 32 [2021-12-17 01:22:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:22:25,278 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2021-12-17 01:22:25,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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) [2021-12-17 01:22:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2021-12-17 01:22:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 01:22:25,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:22:25,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:22:25,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 01:22:25,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:22:25,488 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:22:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:22:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash 611591309, now seen corresponding path program 5 times [2021-12-17 01:22:25,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:22:25,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623499641] [2021-12-17 01:22:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:22:25,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:22:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:22:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:22:25,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:22:25,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623499641] [2021-12-17 01:22:25,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623499641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:22:25,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623458770] [2021-12-17 01:22:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:22:25,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:22:25,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:22:25,560 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) [2021-12-17 01:22:25,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 01:22:25,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 01:22:25,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:22:25,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 01:22:25,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:22:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:22:25,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:22:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:22:25,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623458770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:22:25,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:22:25,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-17 01:22:25,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249250805] [2021-12-17 01:22:25,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:22:25,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 01:22:25,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:22:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 01:22:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-17 01:22:25,781 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-12-17 01:22:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:22:25,934 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2021-12-17 01:22:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 01:22:25,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 32 [2021-12-17 01:22:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:22:25,935 INFO L225 Difference]: With dead ends: 118 [2021-12-17 01:22:25,935 INFO L226 Difference]: Without dead ends: 86 [2021-12-17 01:22:25,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-17 01:22:25,937 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:22:25,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 31 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:22:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-17 01:22:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 37. [2021-12-17 01:22:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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) [2021-12-17 01:22:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-17 01:22:25,943 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 32 [2021-12-17 01:22:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:22:25,944 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-17 01:22:25,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-12-17 01:22:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-17 01:22:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 01:22:25,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:22:25,945 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:22:25,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 01:22:26,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:22:26,152 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:22:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:22:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2033267204, now seen corresponding path program 6 times [2021-12-17 01:22:26,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:22:26,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138422107] [2021-12-17 01:22:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:22:26,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:22:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:22:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:22:26,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:22:26,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138422107] [2021-12-17 01:22:26,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138422107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:22:26,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440550053] [2021-12-17 01:22:26,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:22:26,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:22:26,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:22:26,813 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) [2021-12-17 01:22:26,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 01:22:26,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 01:22:26,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:22:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 01:22:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:22:26,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:22:27,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-17 01:22:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-17 01:22:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-12-17 01:22:27,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:22:27,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2021-12-17 01:22:27,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:22:27,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2021-12-17 01:22:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2021-12-17 01:22:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:22:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2021-12-17 01:22:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:22:27,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:22:39,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_278 Int) (v_ArrVal_272 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_272)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (< 0 v_ArrVal_272) (<= (+ v_ArrVal_278 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_278)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12))) (* 2 c_~N~0)) (< (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) .cse2)) v_ArrVal_278))))) is different from false [2021-12-17 01:22:41,453 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_278 Int) (v_ArrVal_272 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_272)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (<= (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_278)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) v_ArrVal_278) (* 2 c_~N~0)) (< (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ .cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)))) v_ArrVal_278) (< 0 v_ArrVal_272))))) is different from false [2021-12-17 01:23:10,811 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-17 01:23:10,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2550079 treesize of output 2489401 [2021-12-17 01:23:16,031 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 1040 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 01:23:40,459 WARN L227 SmtUtils]: Spent 19.29s on a formula simplification. DAG size of input: 994 DAG size of output: 994 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 01:24:26,102 WARN L227 SmtUtils]: Spent 33.11s on a formula simplification. DAG size of input: 915 DAG size of output: 915 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 01:24:50,847 WARN L227 SmtUtils]: Spent 7.55s on a formula simplification that was a NOOP. DAG size: 913 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 01:25:21,238 WARN L227 SmtUtils]: Spent 10.29s on a formula simplification. DAG size of input: 881 DAG size of output: 880 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 01:25:42,580 WARN L227 SmtUtils]: Spent 9.40s on a formula simplification. DAG size of input: 881 DAG size of output: 881 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 01:25:59,810 WARN L227 SmtUtils]: Spent 7.89s on a formula simplification. DAG size of input: 881 DAG size of output: 881 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15