./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/copysome1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-programs/copysome1-2.i -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 fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:32:57,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:32:57,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:32:57,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:32:57,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:32:57,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:32:57,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:32:57,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:32:57,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:32:57,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:32:57,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:32:57,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:32:57,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:32:57,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:32:57,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:32:57,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:32:57,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:32:57,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:32:57,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:32:57,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:32:57,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:32:57,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:32:57,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:32:57,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:32:57,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:32:57,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:32:57,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:32:57,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:32:57,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:32:57,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:32:57,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:32:57,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:32:57,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:32:57,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:32:57,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:32:57,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:32:57,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:32:57,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:32:57,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:32:57,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:32:57,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:32:57,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:32:57,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:32:57,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:32:57,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:32:57,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:32:57,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:32:57,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:32:57,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:32:57,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:32:57,335 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:32:57,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:32:57,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:32:57,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:32:57,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:32:57,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:32:57,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:32:57,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:32:57,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:32:57,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:32:57,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:32:57,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:32:57,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:32:57,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:32:57,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:32:57,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:32:57,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:32:57,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:32:57,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:32:57,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:32:57,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:32:57,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:32:57,339 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:32:57,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:32:57,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:32:57,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 [2021-12-27 21:32:57,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:32:57,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:32:57,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:32:57,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:32:57,602 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:32:57,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome1-2.i [2021-12-27 21:32:57,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5024292/2628d348b2b84ab8bd3367e6bd184404/FLAG33ccdc0c1 [2021-12-27 21:32:57,966 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:32:57,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-2.i [2021-12-27 21:32:57,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5024292/2628d348b2b84ab8bd3367e6bd184404/FLAG33ccdc0c1 [2021-12-27 21:32:58,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5024292/2628d348b2b84ab8bd3367e6bd184404 [2021-12-27 21:32:58,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:32:58,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:32:58,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:32:58,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:32:58,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:32:58,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16664bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58, skipping insertion in model container [2021-12-27 21:32:58,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:32:58,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:32:58,512 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-programs/copysome1-2.i[805,818] [2021-12-27 21:32:58,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:32:58,526 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:32:58,533 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-programs/copysome1-2.i[805,818] [2021-12-27 21:32:58,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:32:58,546 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:32:58,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58 WrapperNode [2021-12-27 21:32:58,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:32:58,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:32:58,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:32:58,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:32:58,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,589 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-12-27 21:32:58,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:32:58,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:32:58,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:32:58,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:32:58,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:32:58,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:32:58,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:32:58,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:32:58,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (1/1) ... [2021-12-27 21:32:58,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:32:58,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:58,647 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) [2021-12-27 21:32:58,663 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 [2021-12-27 21:32:58,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:32:58,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:32:58,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:32:58,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:32:58,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:32:58,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:32:58,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:32:58,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:32:58,716 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:32:58,717 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:32:58,849 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:32:58,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:32:58,859 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-27 21:32:58,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:32:58 BoogieIcfgContainer [2021-12-27 21:32:58,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:32:58,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:32:58,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:32:58,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:32:58,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:32:58" (1/3) ... [2021-12-27 21:32:58,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51974c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:32:58, skipping insertion in model container [2021-12-27 21:32:58,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:32:58" (2/3) ... [2021-12-27 21:32:58,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51974c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:32:58, skipping insertion in model container [2021-12-27 21:32:58,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:32:58" (3/3) ... [2021-12-27 21:32:58,880 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2021-12-27 21:32:58,883 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:32:58,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:32:58,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:32:58,942 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 [2021-12-27 21:32:58,947 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:32:58,963 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) [2021-12-27 21:32:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:32:58,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:58,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:58,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-12-27 21:32:58,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:58,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431871558] [2021-12-27 21:32:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:58,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:32:59,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:59,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431871558] [2021-12-27 21:32:59,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431871558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:32:59,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:32:59,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:32:59,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917012098] [2021-12-27 21:32:59,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:32:59,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:32:59,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:59,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:32:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:32:59,147 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-27 21:32:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:59,189 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-12-27 21:32:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:32:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-12-27 21:32:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:59,196 INFO L225 Difference]: With dead ends: 41 [2021-12-27 21:32:59,196 INFO L226 Difference]: Without dead ends: 21 [2021-12-27 21:32:59,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:32:59,204 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:59,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:32:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-27 21:32:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-12-27 21:32:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2021-12-27 21:32:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-27 21:32:59,226 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-27 21:32:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:59,226 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-27 21:32:59,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-27 21:32:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-27 21:32:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-27 21:32:59,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:59,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:59,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:32:59,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2021-12-27 21:32:59,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514461122] [2021-12-27 21:32:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:59,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:32:59,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:59,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514461122] [2021-12-27 21:32:59,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514461122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:59,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186072023] [2021-12-27 21:32:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:59,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:59,288 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) [2021-12-27 21:32:59,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:32:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:32:59,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:32:59,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:32:59,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186072023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:32:59,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:32:59,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-27 21:32:59,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871553348] [2021-12-27 21:32:59,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:59,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 21:32:59,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:59,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 21:32:59,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:32:59,469 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-12-27 21:32:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:59,535 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2021-12-27 21:32:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:32:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 15 [2021-12-27 21:32:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:59,536 INFO L225 Difference]: With dead ends: 46 [2021-12-27 21:32:59,536 INFO L226 Difference]: Without dead ends: 33 [2021-12-27 21:32:59,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:32:59,538 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:59,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:32:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-27 21:32:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-27 21:32:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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) [2021-12-27 21:32:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-12-27 21:32:59,542 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2021-12-27 21:32:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:59,543 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-12-27 21:32:59,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-12-27 21:32:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-12-27 21:32:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-27 21:32:59,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:59,544 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:59,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:59,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:59,763 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash -736833947, now seen corresponding path program 2 times [2021-12-27 21:32:59,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:59,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971541474] [2021-12-27 21:32:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:59,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-27 21:32:59,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:59,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971541474] [2021-12-27 21:32:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971541474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:59,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829709289] [2021-12-27 21:32:59,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:32:59,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:59,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:59,889 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) [2021-12-27 21:32:59,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:32:59,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:32:59,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:32:59,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:32:59,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-27 21:33:00,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:33:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-27 21:33:00,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829709289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:33:00,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:33:00,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-27 21:33:00,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144721365] [2021-12-27 21:33:00,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:33:00,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-27 21:33:00,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-27 21:33:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-27 21:33:00,105 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-12-27 21:33:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:00,205 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2021-12-27 21:33:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-27 21:33:00,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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 30 [2021-12-27 21:33:00,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:00,208 INFO L225 Difference]: With dead ends: 85 [2021-12-27 21:33:00,208 INFO L226 Difference]: Without dead ends: 63 [2021-12-27 21:33:00,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-27 21:33:00,212 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:00,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 34 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:33:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-27 21:33:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-27 21:33:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 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) [2021-12-27 21:33:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-27 21:33:00,231 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2021-12-27 21:33:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:00,231 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-27 21:33:00,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-12-27 21:33:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-27 21:33:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-27 21:33:00,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:00,234 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:00,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:33:00,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-27 21:33:00,453 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash -967663183, now seen corresponding path program 3 times [2021-12-27 21:33:00,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:00,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272308735] [2021-12-27 21:33:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:00,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:33:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-27 21:33:00,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:00,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272308735] [2021-12-27 21:33:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272308735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:33:00,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137782740] [2021-12-27 21:33:00,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:33:00,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:00,654 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) [2021-12-27 21:33:00,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:33:02,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-27 21:33:02,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:33:02,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 21:33:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-27 21:33:02,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:33:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-27 21:33:03,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137782740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:33:03,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:33:03,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-27 21:33:03,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132164080] [2021-12-27 21:33:03,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:33:03,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-27 21:33:03,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-27 21:33:03,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-27 21:33:03,110 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 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) [2021-12-27 21:33:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:03,266 INFO L93 Difference]: Finished difference Result 163 states and 224 transitions. [2021-12-27 21:33:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-27 21:33:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 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 60 [2021-12-27 21:33:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:03,268 INFO L225 Difference]: With dead ends: 163 [2021-12-27 21:33:03,268 INFO L226 Difference]: Without dead ends: 123 [2021-12-27 21:33:03,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-27 21:33:03,269 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 182 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:03,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 54 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:33:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-27 21:33:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-12-27 21:33:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 122 states have internal predecessors, (148), 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) [2021-12-27 21:33:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2021-12-27 21:33:03,276 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 60 [2021-12-27 21:33:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:03,276 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2021-12-27 21:33:03,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 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) [2021-12-27 21:33:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2021-12-27 21:33:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-27 21:33:03,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:03,279 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:03,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:33:03,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:03,495 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:03,496 INFO L85 PathProgramCache]: Analyzing trace with hash -232988599, now seen corresponding path program 4 times [2021-12-27 21:33:03,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:03,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938883300] [2021-12-27 21:33:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:03,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:33:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-27 21:33:03,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:03,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938883300] [2021-12-27 21:33:03,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938883300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:33:03,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869900193] [2021-12-27 21:33:03,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:33:03,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:03,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:03,873 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) [2021-12-27 21:33:03,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:33:04,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:33:04,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:33:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-27 21:33:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-27 21:33:04,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:33:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-27 21:33:05,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869900193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:33:05,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:33:05,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-27 21:33:05,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662723684] [2021-12-27 21:33:05,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:33:05,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-27 21:33:05,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-27 21:33:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-27 21:33:05,069 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 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) [2021-12-27 21:33:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:05,435 INFO L93 Difference]: Finished difference Result 319 states and 440 transitions. [2021-12-27 21:33:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-27 21:33:05,436 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 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 120 [2021-12-27 21:33:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:05,439 INFO L225 Difference]: With dead ends: 319 [2021-12-27 21:33:05,439 INFO L226 Difference]: Without dead ends: 243 [2021-12-27 21:33:05,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-27 21:33:05,441 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 564 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:05,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 54 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:33:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-27 21:33:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2021-12-27 21:33:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.2066115702479339) internal successors, (292), 242 states have internal predecessors, (292), 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) [2021-12-27 21:33:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 292 transitions. [2021-12-27 21:33:05,470 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 292 transitions. Word has length 120 [2021-12-27 21:33:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:05,471 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 292 transitions. [2021-12-27 21:33:05,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 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) [2021-12-27 21:33:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 292 transitions. [2021-12-27 21:33:05,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-27 21:33:05,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:05,479 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:05,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:33:05,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:05,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:05,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1469530759, now seen corresponding path program 5 times [2021-12-27 21:33:05,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:05,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142901830] [2021-12-27 21:33:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:05,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:33:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-12-27 21:33:06,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:06,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142901830] [2021-12-27 21:33:06,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142901830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:33:06,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409063646] [2021-12-27 21:33:06,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:33:06,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:06,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:06,686 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) [2021-12-27 21:33:06,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process