./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/loops/verisec_OpenSER_cases1_stripFullBoth_arr.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 8770e865452d763f6a1ae70a92c5caf41552c1e5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:56:06,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:56:06,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:56:06,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:56:06,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:56:06,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:56:06,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:56:06,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:56:06,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:56:06,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:56:06,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:56:06,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:56:06,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:56:06,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:56:06,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:56:06,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:56:06,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:56:06,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:56:06,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:56:06,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:56:06,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:56:06,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:56:06,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:56:06,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:56:06,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:56:06,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:56:06,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:56:06,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:56:06,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:56:06,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:56:06,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:56:06,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:56:06,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:56:06,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:56:06,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:56:06,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:56:06,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:56:06,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:56:06,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:56:06,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:56:06,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:56:06,606 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:56:06,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:56:06,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:56:06,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:56:06,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:56:06,645 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:56:06,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:56:06,646 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:56:06,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:56:06,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:56:06,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:56:06,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:56:06,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:56:06,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:56:06,648 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:56:06,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:56:06,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:56:06,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:56:06,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:56:06,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:56:06,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:56:06,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:56:06,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:56:06,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:56:06,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:56:06,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:56:06,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:56:06,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:56:06,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:56:06,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:56:06,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 8770e865452d763f6a1ae70a92c5caf41552c1e5 [2020-10-20 00:56:06,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:56:06,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:56:06,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:56:06,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:56:06,887 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:56:06,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-20 00:56:06,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bf5fb905/926be79837d2439694229ff52bf7ac33/FLAG5aa4b8d83 [2020-10-20 00:56:07,394 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:56:07,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-20 00:56:07,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bf5fb905/926be79837d2439694229ff52bf7ac33/FLAG5aa4b8d83 [2020-10-20 00:56:07,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bf5fb905/926be79837d2439694229ff52bf7ac33 [2020-10-20 00:56:07,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:56:07,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:56:07,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:56:07,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:56:07,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:56:07,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:56:07" (1/1) ... [2020-10-20 00:56:07,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a444a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:07, skipping insertion in model container [2020-10-20 00:56:07,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:56:07" (1/1) ... [2020-10-20 00:56:07,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:56:07,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:56:08,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:56:08,136 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:56:08,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:56:08,197 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:56:08,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08 WrapperNode [2020-10-20 00:56:08,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:56:08,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:56:08,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:56:08,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:56:08,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:56:08,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:56:08,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:56:08,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:56:08,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... [2020-10-20 00:56:08,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:56:08,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:56:08,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:56:08,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:56:08,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:56:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:56:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:56:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:56:08,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:56:08,419 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-10-20 00:56:08,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:56:08,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:56:08,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:56:08,759 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:56:08,759 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-10-20 00:56:08,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:56:08 BoogieIcfgContainer [2020-10-20 00:56:08,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:56:08,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:56:08,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:56:08,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:56:08,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:56:07" (1/3) ... [2020-10-20 00:56:08,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3310bb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:56:08, skipping insertion in model container [2020-10-20 00:56:08,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:08" (2/3) ... [2020-10-20 00:56:08,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3310bb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:56:08, skipping insertion in model container [2020-10-20 00:56:08,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:56:08" (3/3) ... [2020-10-20 00:56:08,770 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-20 00:56:08,783 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:56:08,798 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:56:08,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:56:08,862 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:56:08,862 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:56:08,863 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:56:08,863 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:56:08,863 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:56:08,863 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:56:08,864 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:56:08,864 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:56:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-20 00:56:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:56:08,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:08,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:08,887 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash -949620774, now seen corresponding path program 1 times [2020-10-20 00:56:08,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:08,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640279663] [2020-10-20 00:56:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:09,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640279663] [2020-10-20 00:56:09,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:56:09,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:56:09,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766421663] [2020-10-20 00:56:09,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:56:09,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:56:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:56:09,082 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-10-20 00:56:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:09,102 INFO L93 Difference]: Finished difference Result 70 states and 101 transitions. [2020-10-20 00:56:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:56:09,104 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-10-20 00:56:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:09,112 INFO L225 Difference]: With dead ends: 70 [2020-10-20 00:56:09,112 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 00:56:09,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:56:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 00:56:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-20 00:56:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:56:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2020-10-20 00:56:09,145 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 19 [2020-10-20 00:56:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:09,145 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2020-10-20 00:56:09,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:56:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2020-10-20 00:56:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:56:09,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:09,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:09,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:56:09,147 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2114946543, now seen corresponding path program 1 times [2020-10-20 00:56:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:09,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923865154] [2020-10-20 00:56:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:09,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923865154] [2020-10-20 00:56:09,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:56:09,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:56:09,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408014804] [2020-10-20 00:56:09,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:56:09,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:56:09,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:56:09,234 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand 3 states. [2020-10-20 00:56:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:09,269 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2020-10-20 00:56:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:56:09,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-20 00:56:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:09,271 INFO L225 Difference]: With dead ends: 60 [2020-10-20 00:56:09,271 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 00:56:09,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:56:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 00:56:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-20 00:56:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:56:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-20 00:56:09,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2020-10-20 00:56:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:09,279 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-20 00:56:09,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:56:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-20 00:56:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:56:09,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:09,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:09,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:56:09,281 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:09,282 INFO L82 PathProgramCache]: Analyzing trace with hash 591672851, now seen corresponding path program 1 times [2020-10-20 00:56:09,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:09,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253879428] [2020-10-20 00:56:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253879428] [2020-10-20 00:56:09,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:56:09,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 00:56:09,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524614542] [2020-10-20 00:56:09,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:56:09,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:09,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:56:09,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:56:09,376 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2020-10-20 00:56:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:09,468 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2020-10-20 00:56:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:56:09,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-20 00:56:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:09,470 INFO L225 Difference]: With dead ends: 91 [2020-10-20 00:56:09,471 INFO L226 Difference]: Without dead ends: 62 [2020-10-20 00:56:09,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:56:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-20 00:56:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2020-10-20 00:56:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-20 00:56:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-10-20 00:56:09,479 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 23 [2020-10-20 00:56:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:09,479 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-10-20 00:56:09,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:56:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-10-20 00:56:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:56:09,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:09,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:09,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:56:09,488 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1557333587, now seen corresponding path program 1 times [2020-10-20 00:56:09,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:09,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904480874] [2020-10-20 00:56:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:09,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904480874] [2020-10-20 00:56:09,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:56:09,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 00:56:09,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996211472] [2020-10-20 00:56:09,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:56:09,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:56:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:56:09,674 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 7 states. [2020-10-20 00:56:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:09,959 INFO L93 Difference]: Finished difference Result 148 states and 195 transitions. [2020-10-20 00:56:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:56:09,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-20 00:56:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:09,962 INFO L225 Difference]: With dead ends: 148 [2020-10-20 00:56:09,963 INFO L226 Difference]: Without dead ends: 102 [2020-10-20 00:56:09,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-20 00:56:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-20 00:56:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-10-20 00:56:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-20 00:56:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2020-10-20 00:56:09,975 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 23 [2020-10-20 00:56:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:09,976 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2020-10-20 00:56:09,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:56:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2020-10-20 00:56:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:56:09,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:09,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:09,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:56:09,978 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:09,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash 546216337, now seen corresponding path program 1 times [2020-10-20 00:56:09,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:09,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615502771] [2020-10-20 00:56:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:10,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615502771] [2020-10-20 00:56:10,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:56:10,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 00:56:10,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476416806] [2020-10-20 00:56:10,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:56:10,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:10,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:56:10,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:56:10,096 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand 6 states. [2020-10-20 00:56:10,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:10,322 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2020-10-20 00:56:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:56:10,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-20 00:56:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:10,325 INFO L225 Difference]: With dead ends: 105 [2020-10-20 00:56:10,325 INFO L226 Difference]: Without dead ends: 101 [2020-10-20 00:56:10,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:56:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-20 00:56:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-20 00:56:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-20 00:56:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-10-20 00:56:10,353 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 23 [2020-10-20 00:56:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:10,353 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-10-20 00:56:10,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:56:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-10-20 00:56:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:56:10,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:10,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:10,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:56:10,368 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:10,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1564224654, now seen corresponding path program 1 times [2020-10-20 00:56:10,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:10,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724738383] [2020-10-20 00:56:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:10,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724738383] [2020-10-20 00:56:10,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:56:10,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:56:10,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298958371] [2020-10-20 00:56:10,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:56:10,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:10,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:56:10,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:56:10,429 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 4 states. [2020-10-20 00:56:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:10,461 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2020-10-20 00:56:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:56:10,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 00:56:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:10,462 INFO L225 Difference]: With dead ends: 132 [2020-10-20 00:56:10,463 INFO L226 Difference]: Without dead ends: 89 [2020-10-20 00:56:10,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:56:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-20 00:56:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-20 00:56:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-20 00:56:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2020-10-20 00:56:10,473 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 25 [2020-10-20 00:56:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:10,474 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2020-10-20 00:56:10,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:56:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2020-10-20 00:56:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:56:10,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:10,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:10,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:56:10,476 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1822390092, now seen corresponding path program 1 times [2020-10-20 00:56:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:10,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314351084] [2020-10-20 00:56:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:10,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314351084] [2020-10-20 00:56:10,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:56:10,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 00:56:10,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863347633] [2020-10-20 00:56:10,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:56:10,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:10,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:56:10,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:56:10,534 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand 6 states. [2020-10-20 00:56:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:10,638 INFO L93 Difference]: Finished difference Result 193 states and 249 transitions. [2020-10-20 00:56:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:56:10,639 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-20 00:56:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:10,640 INFO L225 Difference]: With dead ends: 193 [2020-10-20 00:56:10,640 INFO L226 Difference]: Without dead ends: 116 [2020-10-20 00:56:10,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:56:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-20 00:56:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2020-10-20 00:56:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-20 00:56:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2020-10-20 00:56:10,651 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 25 [2020-10-20 00:56:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:10,651 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2020-10-20 00:56:10,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:56:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2020-10-20 00:56:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 00:56:10,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:10,653 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:10,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 00:56:10,654 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:10,654 INFO L82 PathProgramCache]: Analyzing trace with hash 895915798, now seen corresponding path program 1 times [2020-10-20 00:56:10,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:10,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758970066] [2020-10-20 00:56:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758970066] [2020-10-20 00:56:10,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609487675] [2020-10-20 00:56:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:56:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:10,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:56:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:56:10,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:56:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:10,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:56:10,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-20 00:56:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667848173] [2020-10-20 00:56:10,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:56:10,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:56:10,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:56:10,872 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand 7 states. [2020-10-20 00:56:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:11,017 INFO L93 Difference]: Finished difference Result 228 states and 281 transitions. [2020-10-20 00:56:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:56:11,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-20 00:56:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:11,020 INFO L225 Difference]: With dead ends: 228 [2020-10-20 00:56:11,020 INFO L226 Difference]: Without dead ends: 163 [2020-10-20 00:56:11,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:56:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-20 00:56:11,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 123. [2020-10-20 00:56:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-20 00:56:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2020-10-20 00:56:11,032 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 30 [2020-10-20 00:56:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:11,033 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2020-10-20 00:56:11,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:56:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2020-10-20 00:56:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 00:56:11,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:11,035 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:11,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-10-20 00:56:11,249 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:11,250 INFO L82 PathProgramCache]: Analyzing trace with hash 267240844, now seen corresponding path program 2 times [2020-10-20 00:56:11,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:11,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794366750] [2020-10-20 00:56:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794366750] [2020-10-20 00:56:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216252281] [2020-10-20 00:56:11,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:56:11,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:56:11,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:56:11,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:56:11,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:56:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:11,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:56:11,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-10-20 00:56:11,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366155018] [2020-10-20 00:56:11,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 00:56:11,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 00:56:11,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-20 00:56:11,628 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand 17 states. [2020-10-20 00:56:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:12,181 INFO L93 Difference]: Finished difference Result 255 states and 314 transitions. [2020-10-20 00:56:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 00:56:12,182 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-20 00:56:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:12,184 INFO L225 Difference]: With dead ends: 255 [2020-10-20 00:56:12,184 INFO L226 Difference]: Without dead ends: 175 [2020-10-20 00:56:12,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-10-20 00:56:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-20 00:56:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 116. [2020-10-20 00:56:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-20 00:56:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-10-20 00:56:12,193 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 35 [2020-10-20 00:56:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:12,194 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-10-20 00:56:12,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 00:56:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2020-10-20 00:56:12,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 00:56:12,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:12,196 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:12,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:56:12,409 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:12,409 INFO L82 PathProgramCache]: Analyzing trace with hash -753827510, now seen corresponding path program 1 times [2020-10-20 00:56:12,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:12,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717237118] [2020-10-20 00:56:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:12,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717237118] [2020-10-20 00:56:12,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407731011] [2020-10-20 00:56:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:56:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:12,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 00:56:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:56:12,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:56:12,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:56:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:12,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:56:12,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-10-20 00:56:12,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185902554] [2020-10-20 00:56:12,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:56:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:12,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:56:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:56:12,796 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand 16 states. [2020-10-20 00:56:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:13,287 INFO L93 Difference]: Finished difference Result 226 states and 277 transitions. [2020-10-20 00:56:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 00:56:13,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-20 00:56:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:13,291 INFO L225 Difference]: With dead ends: 226 [2020-10-20 00:56:13,291 INFO L226 Difference]: Without dead ends: 222 [2020-10-20 00:56:13,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2020-10-20 00:56:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-20 00:56:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 135. [2020-10-20 00:56:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-20 00:56:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2020-10-20 00:56:13,309 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 35 [2020-10-20 00:56:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:13,310 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2020-10-20 00:56:13,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:56:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2020-10-20 00:56:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 00:56:13,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:13,315 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:56:13,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 00:56:13,531 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:13,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:13,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1021179852, now seen corresponding path program 1 times [2020-10-20 00:56:13,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:13,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428310427] [2020-10-20 00:56:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:56:13,549 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:56:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:56:13,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:56:13,591 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:56:13,591 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:56:13,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 00:56:13,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:56:13 BoogieIcfgContainer [2020-10-20 00:56:13,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:56:13,641 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:56:13,641 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:56:13,641 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:56:13,642 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:56:08" (3/4) ... [2020-10-20 00:56:13,644 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:56:13,700 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:56:13,701 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:56:13,703 INFO L168 Benchmark]: Toolchain (without parser) took 5913.87 ms. Allocated memory was 34.1 MB in the beginning and 71.3 MB in the end (delta: 37.2 MB). Free memory was 14.6 MB in the beginning and 21.2 MB in the end (delta: -6.6 MB). Peak memory consumption was 30.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:13,704 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 32.5 MB. Free memory was 10.0 MB in the beginning and 10.0 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. [2020-10-20 00:56:13,707 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.33 ms. Allocated memory was 34.1 MB in the beginning and 42.5 MB in the end (delta: 8.4 MB). Free memory was 13.7 MB in the beginning and 21.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:13,707 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.54 ms. Allocated memory is still 42.5 MB. Free memory was 20.9 MB in the beginning and 18.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:13,708 INFO L168 Benchmark]: Boogie Preprocessor took 59.74 ms. Allocated memory is still 42.5 MB. Free memory was 18.8 MB in the beginning and 17.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:13,708 INFO L168 Benchmark]: RCFGBuilder took 423.94 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 17.0 MB in the beginning and 22.6 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:13,712 INFO L168 Benchmark]: TraceAbstraction took 4877.94 ms. Allocated memory was 44.0 MB in the beginning and 71.3 MB in the end (delta: 27.3 MB). Free memory was 22.1 MB in the beginning and 25.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 23.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:13,712 INFO L168 Benchmark]: Witness Printer took 59.89 ms. Allocated memory is still 71.3 MB. Free memory was 25.5 MB in the beginning and 21.2 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:13,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 32.5 MB. Free memory was 10.0 MB in the beginning and 10.0 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 404.33 ms. Allocated memory was 34.1 MB in the beginning and 42.5 MB in the end (delta: 8.4 MB). Free memory was 13.7 MB in the beginning and 21.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 77.54 ms. Allocated memory is still 42.5 MB. Free memory was 20.9 MB in the beginning and 18.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 59.74 ms. Allocated memory is still 42.5 MB. Free memory was 18.8 MB in the beginning and 17.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 423.94 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 17.0 MB in the beginning and 22.6 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4877.94 ms. Allocated memory was 44.0 MB in the beginning and 71.3 MB in the end (delta: 27.3 MB). Free memory was 22.1 MB in the beginning and 25.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 23.8 MB. Max. memory is 14.3 GB. * Witness Printer took 59.89 ms. Allocated memory is still 71.3 MB. Free memory was 25.5 MB in the beginning and 21.2 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L85] char A [2 + 2 + 4 +1]; [L86] A[2 + 2 + 4] = 0 [L59] int start=0, i=-1, j=-1; [L60] char str2[2]; [L61] COND FALSE !(!str) [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L67] EXPR str[start] [L67] COND FALSE !(str[start] == '"') [L68] j = i-1 [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L70] (0 < j) && (str[j] == '"') [L70] EXPR str[j] [L70] (0 < j) && (str[j] == '"') [L70] COND FALSE !((0 < j) && (str[j] == '"')) [L71] COND TRUE start<=j [L41] return strncpy(dest,src,n); [L14] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "verisec_OpenSER_cases1_stripFullBoth_arr.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 489 SDtfs, 1264 SDslu, 1417 SDs, 0 SdLazy, 1181 SolverSat, 192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 299 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 396 NumberOfCodeBlocks, 396 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 348 ConstructedInterpolants, 0 QuantifiedInterpolants, 37910 SizeOfPredicates, 10 NumberOfNonLiveVariables, 425 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 0/40 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...