./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/xor2.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-crafted/xor2.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 134cd77c565ec0964d690e2c701df7f2f34c79dd30f80feda5f549f6f11dd00c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:36:36,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:36:36,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:36:36,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:36:36,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:36:36,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:36:36,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:36:36,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:36:36,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:36:36,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:36:36,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:36:36,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:36:36,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:36:36,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:36:36,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:36:36,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:36:36,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:36:36,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:36:36,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:36:36,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:36:36,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:36:36,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:36:36,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:36:36,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:36:36,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:36:36,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:36:36,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:36:36,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:36:36,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:36:36,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:36:36,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:36:36,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:36:36,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:36:36,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:36:36,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:36:36,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:36:36,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:36:36,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:36:36,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:36:36,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:36:36,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:36:36,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:36:36,521 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:36:36,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:36:36,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:36:36,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:36:36,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:36:36,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:36:36,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:36:36,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:36:36,524 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:36:36,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:36:36,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:36:36,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:36:36,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:36:36,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:36:36,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:36:36,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:36:36,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:36:36,526 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:36:36,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:36:36,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:36:36,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:36:36,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:36:36,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:36:36,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:36:36,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:36:36,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:36:36,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:36:36,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:36:36,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:36:36,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:36:36,528 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:36:36,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:36:36,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:36:36,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134cd77c565ec0964d690e2c701df7f2f34c79dd30f80feda5f549f6f11dd00c [2021-12-27 21:36:36,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:36:36,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:36:36,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:36:36,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:36:36,825 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:36:36,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor2.i [2021-12-27 21:36:36,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baffd80c9/b1a62356cbdb4e3abd096058f1ea9ac5/FLAGbdbdb165d [2021-12-27 21:36:37,267 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:36:37,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor2.i [2021-12-27 21:36:37,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baffd80c9/b1a62356cbdb4e3abd096058f1ea9ac5/FLAGbdbdb165d [2021-12-27 21:36:37,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baffd80c9/b1a62356cbdb4e3abd096058f1ea9ac5 [2021-12-27 21:36:37,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:36:37,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:36:37,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:36:37,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:36:37,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:36:37,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8663b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37, skipping insertion in model container [2021-12-27 21:36:37,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:36:37,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:36:37,796 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-crafted/xor2.i[1291,1304] [2021-12-27 21:36:37,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:36:37,802 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:36:37,844 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-crafted/xor2.i[1291,1304] [2021-12-27 21:36:37,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:36:37,853 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:36:37,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37 WrapperNode [2021-12-27 21:36:37,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:36:37,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:36:37,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:36:37,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:36:37,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,873 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2021-12-27 21:36:37,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:36:37,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:36:37,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:36:37,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:36:37,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:36:37,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:36:37,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:36:37,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:36:37,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (1/1) ... [2021-12-27 21:36:37,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:36:37,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:37,909 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 21:36:37,913 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 21:36:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:36:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:36:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:36:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:36:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:36:37,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:36:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:36:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2021-12-27 21:36:37,934 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2021-12-27 21:36:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:36:37,998 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:36:37,999 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:36:38,137 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:36:38,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:36:38,140 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-27 21:36:38,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:36:38 BoogieIcfgContainer [2021-12-27 21:36:38,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:36:38,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:36:38,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:36:38,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:36:38,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:36:37" (1/3) ... [2021-12-27 21:36:38,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45312e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:36:38, skipping insertion in model container [2021-12-27 21:36:38,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:36:37" (2/3) ... [2021-12-27 21:36:38,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45312e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:36:38, skipping insertion in model container [2021-12-27 21:36:38,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:36:38" (3/3) ... [2021-12-27 21:36:38,146 INFO L111 eAbstractionObserver]: Analyzing ICFG xor2.i [2021-12-27 21:36:38,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:36:38,149 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:36:38,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:36:38,208 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 21:36:38,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:36:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-27 21:36:38,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:38,235 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:38,235 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:38,239 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2021-12-27 21:36:38,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:38,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011468082] [2021-12-27 21:36:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:38,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:38,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-27 21:36:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:38,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-27 21:36:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:38,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:36:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-27 21:36:38,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:38,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011468082] [2021-12-27 21:36:38,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011468082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:38,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839390476] [2021-12-27 21:36:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:38,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:38,428 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 21:36:38,470 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 21:36:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 21:36:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-27 21:36:38,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:36:38,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839390476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:36:38,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:36:38,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-27 21:36:38,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492428303] [2021-12-27 21:36:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:36:38,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:36:38,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:36:38,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:36:38,667 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-27 21:36:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:38,708 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-27 21:36:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:36:38,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-27 21:36:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:38,715 INFO L225 Difference]: With dead ends: 50 [2021-12-27 21:36:38,727 INFO L226 Difference]: Without dead ends: 24 [2021-12-27 21:36:38,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:36:38,732 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:38,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:36:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-27 21:36:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-27 21:36:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-27 21:36:38,755 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-12-27 21:36:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:38,755 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-27 21:36:38,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-27 21:36:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-27 21:36:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-27 21:36:38,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:38,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:38,774 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 21:36:38,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-27 21:36:38,982 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:38,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2021-12-27 21:36:38,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387047949] [2021-12-27 21:36:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:38,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-27 21:36:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-27 21:36:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-27 21:36:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-27 21:36:39,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387047949] [2021-12-27 21:36:39,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387047949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348571600] [2021-12-27 21:36:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:39,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:39,086 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 21:36:39,087 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 21:36:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 21:36:39,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-27 21:36:39,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:36:39,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348571600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:36:39,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:36:39,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-27 21:36:39,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227717806] [2021-12-27 21:36:39,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:36:39,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:36:39,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:36:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:36:39,188 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-27 21:36:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:39,199 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-27 21:36:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:36:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-27 21:36:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:39,201 INFO L225 Difference]: With dead ends: 42 [2021-12-27 21:36:39,201 INFO L226 Difference]: Without dead ends: 25 [2021-12-27 21:36:39,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:36:39,204 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:39,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:36:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-27 21:36:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-27 21:36:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-27 21:36:39,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2021-12-27 21:36:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:39,213 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-27 21:36:39,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-27 21:36:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-27 21:36:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-27 21:36:39,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:39,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:39,236 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 21:36:39,431 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,SelfDestructingSolverStorable1 [2021-12-27 21:36:39,431 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2021-12-27 21:36:39,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:39,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620917479] [2021-12-27 21:36:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:39,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-27 21:36:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-27 21:36:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:36:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-27 21:36:39,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:39,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620917479] [2021-12-27 21:36:39,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620917479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:39,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519260384] [2021-12-27 21:36:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:39,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:39,512 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 21:36:39,520 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 21:36:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 21:36:39,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-27 21:36:39,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:36:39,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519260384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:36:39,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:36:39,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-27 21:36:39,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593312873] [2021-12-27 21:36:39,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:36:39,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:36:39,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:36:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:36:39,643 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-27 21:36:39,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:39,651 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-27 21:36:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:36:39,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-27 21:36:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:39,652 INFO L225 Difference]: With dead ends: 39 [2021-12-27 21:36:39,652 INFO L226 Difference]: Without dead ends: 26 [2021-12-27 21:36:39,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:36:39,653 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:39,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:36:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-27 21:36:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-27 21:36:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-27 21:36:39,658 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2021-12-27 21:36:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:39,659 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-27 21:36:39,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-27 21:36:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-27 21:36:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-27 21:36:39,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:39,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:39,681 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 21:36:39,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:39,875 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2021-12-27 21:36:39,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:39,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078214815] [2021-12-27 21:36:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:39,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-27 21:36:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-27 21:36:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:36:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-27 21:36:39,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078214815] [2021-12-27 21:36:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078214815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936081990] [2021-12-27 21:36:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:39,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:39,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:39,971 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 21:36:39,972 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 21:36:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:36:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 21:36:40,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 21:36:40,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936081990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:40,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:40,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-27 21:36:40,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641279925] [2021-12-27 21:36:40,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:40,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 21:36:40,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:40,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 21:36:40,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:36:40,170 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-27 21:36:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:40,196 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-27 21:36:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 21:36:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2021-12-27 21:36:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:40,197 INFO L225 Difference]: With dead ends: 54 [2021-12-27 21:36:40,197 INFO L226 Difference]: Without dead ends: 34 [2021-12-27 21:36:40,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:36:40,198 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:40,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:36:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-27 21:36:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-27 21:36:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-27 21:36:40,202 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2021-12-27 21:36:40,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:40,203 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-27 21:36:40,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-27 21:36:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-27 21:36:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-27 21:36:40,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:40,204 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:40,226 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 21:36:40,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:40,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2021-12-27 21:36:40,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:40,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65246985] [2021-12-27 21:36:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:40,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:40,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-27 21:36:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:40,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-27 21:36:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:40,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-27 21:36:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-27 21:36:40,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:40,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65246985] [2021-12-27 21:36:40,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65246985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:40,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472628473] [2021-12-27 21:36:40,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:36:40,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:40,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:40,511 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 21:36:40,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:36:40,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:36:40,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:36:40,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:36:40,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-27 21:36:40,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-27 21:36:40,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472628473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:40,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:40,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-27 21:36:40,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070263405] [2021-12-27 21:36:40,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:40,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-27 21:36:40,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:40,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-27 21:36:40,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:36:40,799 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-27 21:36:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:40,851 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-12-27 21:36:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-27 21:36:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2021-12-27 21:36:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:40,853 INFO L225 Difference]: With dead ends: 70 [2021-12-27 21:36:40,853 INFO L226 Difference]: Without dead ends: 48 [2021-12-27 21:36:40,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:36:40,855 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:40,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:36:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-27 21:36:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-27 21:36:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-27 21:36:40,863 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2021-12-27 21:36:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:40,863 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-27 21:36:40,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-27 21:36:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-27 21:36:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-27 21:36:40,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:40,864 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:40,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:36:41,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:41,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2021-12-27 21:36:41,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:41,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302730639] [2021-12-27 21:36:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:41,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:41,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 21:36:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-27 21:36:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:41,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-27 21:36:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-27 21:36:41,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302730639] [2021-12-27 21:36:41,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302730639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660180720] [2021-12-27 21:36:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:36:41,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:41,143 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) [2021-12-27 21:36:41,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:36:41,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-27 21:36:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:36:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:36:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-27 21:36:41,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-27 21:36:41,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660180720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:41,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:41,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-27 21:36:41,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727750456] [2021-12-27 21:36:41,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:41,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:36:41,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:36:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:36:41,381 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:36:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:41,409 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-12-27 21:36:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 21:36:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2021-12-27 21:36:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:41,412 INFO L225 Difference]: With dead ends: 78 [2021-12-27 21:36:41,412 INFO L226 Difference]: Without dead ends: 55 [2021-12-27 21:36:41,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:36:41,413 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:41,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:36:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-27 21:36:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-27 21:36:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-12-27 21:36:41,418 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 64 [2021-12-27 21:36:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:41,419 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-12-27 21:36:41,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:36:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-12-27 21:36:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-27 21:36:41,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:41,421 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:41,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:36:41,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:41,629 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 756543039, now seen corresponding path program 4 times [2021-12-27 21:36:41,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:41,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869402462] [2021-12-27 21:36:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:41,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:41,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 21:36:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-27 21:36:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:41,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-27 21:36:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-27 21:36:41,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869402462] [2021-12-27 21:36:41,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869402462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:41,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690569157] [2021-12-27 21:36:41,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:36:41,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:41,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:41,764 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) [2021-12-27 21:36:41,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:36:41,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:36:41,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:36:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 21:36:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-27 21:36:41,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-27 21:36:42,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690569157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:42,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:42,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-27 21:36:42,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142871601] [2021-12-27 21:36:42,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:42,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-27 21:36:42,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:42,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-27 21:36:42,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-27 21:36:42,171 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-27 21:36:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:42,232 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-12-27 21:36:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-27 21:36:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 88 [2021-12-27 21:36:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:42,236 INFO L225 Difference]: With dead ends: 111 [2021-12-27 21:36:42,236 INFO L226 Difference]: Without dead ends: 79 [2021-12-27 21:36:42,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 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 21:36:42,239 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:42,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 112 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:36:42,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-27 21:36:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-12-27 21:36:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-12-27 21:36:42,258 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 88 [2021-12-27 21:36:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:42,258 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-12-27 21:36:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-27 21:36:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-12-27 21:36:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-27 21:36:42,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:42,260 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:42,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:36:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:42,475 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1325683031, now seen corresponding path program 5 times [2021-12-27 21:36:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:42,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355675882] [2021-12-27 21:36:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:42,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-27 21:36:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:42,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-27 21:36:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:42,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-27 21:36:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-27 21:36:42,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:42,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355675882] [2021-12-27 21:36:42,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355675882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607023028] [2021-12-27 21:36:42,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:36:42,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:42,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:42,748 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:36:42,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:36:43,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-27 21:36:43,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:36:43,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:36:43,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-12-27 21:36:43,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-12-27 21:36:43,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607023028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:43,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:43,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2021-12-27 21:36:43,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338676041] [2021-12-27 21:36:43,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:43,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-27 21:36:43,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-27 21:36:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-12-27 21:36:43,903 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:36:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:43,986 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2021-12-27 21:36:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-27 21:36:43,986 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2021-12-27 21:36:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:43,988 INFO L225 Difference]: With dead ends: 130 [2021-12-27 21:36:43,988 INFO L226 Difference]: Without dead ends: 98 [2021-12-27 21:36:43,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-12-27 21:36:43,989 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:43,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:36:43,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-27 21:36:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-12-27 21:36:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-12-27 21:36:44,002 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 112 [2021-12-27 21:36:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:44,002 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-12-27 21:36:44,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:36:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-12-27 21:36:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-27 21:36:44,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:44,007 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:44,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-27 21:36:44,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-27 21:36:44,224 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2024695735, now seen corresponding path program 6 times [2021-12-27 21:36:44,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636674351] [2021-12-27 21:36:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:44,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:44,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-27 21:36:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:44,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-27 21:36:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:44,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-27 21:36:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2021-12-27 21:36:44,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:44,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636674351] [2021-12-27 21:36:44,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636674351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:44,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119882016] [2021-12-27 21:36:44,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-27 21:36:44,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:44,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:44,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:36:44,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:36:44,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-27 21:36:44,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:36:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:36:44,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 850 proven. 4 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2021-12-27 21:36:44,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2021-12-27 21:36:45,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119882016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:45,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:45,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2021-12-27 21:36:45,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3375491] [2021-12-27 21:36:45,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:45,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-27 21:36:45,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:45,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-27 21:36:45,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-12-27 21:36:45,039 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:36:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:45,110 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-12-27 21:36:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-27 21:36:45,110 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 162 [2021-12-27 21:36:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:45,111 INFO L225 Difference]: With dead ends: 156 [2021-12-27 21:36:45,111 INFO L226 Difference]: Without dead ends: 108 [2021-12-27 21:36:45,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-12-27 21:36:45,112 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:45,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:36:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-27 21:36:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-12-27 21:36:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-12-27 21:36:45,131 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 162 [2021-12-27 21:36:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:45,131 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-12-27 21:36:45,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:36:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-12-27 21:36:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-27 21:36:45,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:45,133 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:45,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:36:45,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:45,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash -615578557, now seen corresponding path program 7 times [2021-12-27 21:36:45,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:45,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819623827] [2021-12-27 21:36:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:45,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:45,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-27 21:36:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:45,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-27 21:36:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:45,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-27 21:36:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-27 21:36:45,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819623827] [2021-12-27 21:36:45,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819623827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:45,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485839069] [2021-12-27 21:36:45,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-27 21:36:45,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:45,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:45,676 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:36:45,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:36:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-27 21:36:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-27 21:36:46,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-27 21:36:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485839069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:46,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:46,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-12-27 21:36:46,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746776303] [2021-12-27 21:36:46,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:46,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-27 21:36:46,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-27 21:36:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-27 21:36:46,782 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-27 21:36:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:46,881 INFO L93 Difference]: Finished difference Result 215 states and 248 transitions. [2021-12-27 21:36:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-27 21:36:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 172 [2021-12-27 21:36:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:46,882 INFO L225 Difference]: With dead ends: 215 [2021-12-27 21:36:46,882 INFO L226 Difference]: Without dead ends: 159 [2021-12-27 21:36:46,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-27 21:36:46,884 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:46,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 112 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:36:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-27 21:36:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-12-27 21:36:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2021-12-27 21:36:46,890 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 172 [2021-12-27 21:36:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:46,890 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2021-12-27 21:36:46,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-27 21:36:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2021-12-27 21:36:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-27 21:36:46,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:46,892 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:46,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-27 21:36:47,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-27 21:36:47,106 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash -503255561, now seen corresponding path program 8 times [2021-12-27 21:36:47,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:47,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991819610] [2021-12-27 21:36:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:47,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:48,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-27 21:36:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:48,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-27 21:36:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-27 21:36:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-27 21:36:48,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991819610] [2021-12-27 21:36:48,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991819610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725561735] [2021-12-27 21:36:48,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:36:48,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:48,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:48,100 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:36:48,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-27 21:36:48,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:36:48,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:36:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-27 21:36:48,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-27 21:36:48,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-27 21:36:50,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725561735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:50,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:50,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-12-27 21:36:50,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986106071] [2021-12-27 21:36:50,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:50,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-27 21:36:50,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-27 21:36:50,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-27 21:36:50,548 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-27 21:36:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:50,788 INFO L93 Difference]: Finished difference Result 319 states and 378 transitions. [2021-12-27 21:36:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-27 21:36:50,788 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 224 [2021-12-27 21:36:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:50,790 INFO L225 Difference]: With dead ends: 319 [2021-12-27 21:36:50,790 INFO L226 Difference]: Without dead ends: 263 [2021-12-27 21:36:50,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-27 21:36:50,793 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 153 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:50,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 178 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:36:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-27 21:36:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-27 21:36:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 267 transitions. [2021-12-27 21:36:50,801 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 267 transitions. Word has length 224 [2021-12-27 21:36:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:50,802 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 267 transitions. [2021-12-27 21:36:50,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-27 21:36:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 267 transitions. [2021-12-27 21:36:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-27 21:36:50,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:50,805 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:50,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-27 21:36:51,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-27 21:36:51,020 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 57715551, now seen corresponding path program 9 times [2021-12-27 21:36:51,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:51,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646164267] [2021-12-27 21:36:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:51,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:53,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-27 21:36:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:53,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-12-27 21:36:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:53,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2021-12-27 21:36:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-27 21:36:53,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646164267] [2021-12-27 21:36:53,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646164267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486325132] [2021-12-27 21:36:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:36:53,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:53,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:53,431 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:36:53,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-27 21:36:53,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-27 21:36:53,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:36:53,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:36:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 11417 trivial. 0 not checked. [2021-12-27 21:36:54,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12267 trivial. 0 not checked. [2021-12-27 21:36:54,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486325132] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:54,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:54,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 9, 9] total 119 [2021-12-27 21:36:54,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105836944] [2021-12-27 21:36:54,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:54,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-27 21:36:54,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-27 21:36:54,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2021-12-27 21:36:54,404 INFO L87 Difference]: Start difference. First operand 263 states and 267 transitions. Second operand has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:36:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:36:54,626 INFO L93 Difference]: Finished difference Result 338 states and 354 transitions. [2021-12-27 21:36:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-27 21:36:54,626 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 328 [2021-12-27 21:36:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:36:54,629 INFO L225 Difference]: With dead ends: 338 [2021-12-27 21:36:54,629 INFO L226 Difference]: Without dead ends: 282 [2021-12-27 21:36:54,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2021-12-27 21:36:54,633 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:36:54,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 279 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:36:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-27 21:36:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-12-27 21:36:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0108695652173914) internal successors, (279), 276 states have internal predecessors, (279), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:36:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2021-12-27 21:36:54,641 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 328 [2021-12-27 21:36:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:36:54,642 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2021-12-27 21:36:54,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:36:54,642 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2021-12-27 21:36:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-27 21:36:54,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:36:54,645 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:36:54,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-27 21:36:54,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-27 21:36:54,865 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:36:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:36:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1915853137, now seen corresponding path program 10 times [2021-12-27 21:36:54,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:36:54,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10039154] [2021-12-27 21:36:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:36:54,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:36:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:57,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-12-27 21:36:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-27 21:36:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2021-12-27 21:36:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:36:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-27 21:36:58,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:36:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10039154] [2021-12-27 21:36:58,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10039154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:36:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323174650] [2021-12-27 21:36:58,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:36:58,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:36:58,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:36:58,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:36:58,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-27 21:36:58,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:36:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:36:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-27 21:36:58,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:36:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 1271 proven. 196 refuted. 0 times theorem prover too weak. 11201 trivial. 0 not checked. [2021-12-27 21:36:59,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:36:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 424 proven. 620 refuted. 0 times theorem prover too weak. 11624 trivial. 0 not checked. [2021-12-27 21:36:59,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323174650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:36:59,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:36:59,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 17, 17] total 136 [2021-12-27 21:36:59,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945039313] [2021-12-27 21:36:59,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:36:59,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-12-27 21:36:59,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:36:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-12-27 21:36:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6060, Invalid=12300, Unknown=0, NotChecked=0, Total=18360 [2021-12-27 21:36:59,955 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:37:00,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:37:00,203 INFO L93 Difference]: Finished difference Result 388 states and 415 transitions. [2021-12-27 21:37:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-27 21:37:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 346 [2021-12-27 21:37:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:37:00,213 INFO L225 Difference]: With dead ends: 388 [2021-12-27 21:37:00,214 INFO L226 Difference]: Without dead ends: 316 [2021-12-27 21:37:00,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6060, Invalid=12300, Unknown=0, NotChecked=0, Total=18360 [2021-12-27 21:37:00,216 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:37:00,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 242 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:37:00,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-27 21:37:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2021-12-27 21:37:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0096774193548388) internal successors, (313), 310 states have internal predecessors, (313), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:37:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 319 transitions. [2021-12-27 21:37:00,225 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 319 transitions. Word has length 346 [2021-12-27 21:37:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:37:00,225 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 319 transitions. [2021-12-27 21:37:00,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:37:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 319 transitions. [2021-12-27 21:37:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-12-27 21:37:00,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:37:00,232 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 90, 90, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:37:00,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-27 21:37:00,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-27 21:37:00,447 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:37:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:37:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2050589619, now seen corresponding path program 11 times [2021-12-27 21:37:00,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:37:00,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799478342] [2021-12-27 21:37:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:37:00,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:37:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:37:03,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-12-27 21:37:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:37:03,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2021-12-27 21:37:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:37:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 375 [2021-12-27 21:37:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:37:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19307 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2021-12-27 21:37:03,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:37:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799478342] [2021-12-27 21:37:03,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799478342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:37:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544604662] [2021-12-27 21:37:03,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:37:03,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:37:03,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:37:03,951 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:37:04,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process