./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/diamond_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/diamond_1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 278330930f6296a6ef523f9a21bb3281878247b5e50b78eb9077d2b7690716c4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:46:17,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:46:17,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:46:17,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:46:17,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:46:17,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:46:17,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:46:17,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:46:17,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:46:17,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:46:17,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:46:17,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:46:17,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:46:17,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:46:17,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:46:17,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:46:17,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:46:17,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:46:17,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:46:17,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:46:17,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:46:17,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:46:17,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:46:17,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:46:17,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:46:17,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:46:17,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:46:17,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:46:17,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:46:17,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:46:17,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:46:17,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:46:17,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:46:17,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:46:17,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:46:17,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:46:17,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:46:17,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:46:17,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:46:17,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:46:17,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:46:17,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:46:17,761 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:46:17,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:46:17,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:46:17,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:46:17,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:46:17,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:46:17,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:46:17,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:46:17,764 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:46:17,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:46:17,765 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:46:17,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:46:17,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:46:17,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:46:17,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:46:17,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:46:17,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:46:17,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:46:17,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:46:17,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:46:17,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:46:17,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:46:17,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:46:17,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:46:17,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:46:17,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:46:17,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:46:17,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:46:17,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:46:17,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:46:17,767 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:46:17,767 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:46:17,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:46:17,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:46:17,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 278330930f6296a6ef523f9a21bb3281878247b5e50b78eb9077d2b7690716c4 [2021-12-17 09:46:17,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:46:18,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:46:18,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:46:18,015 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:46:18,015 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:46:18,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-12-17 09:46:18,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cd13610/59c69218fbc04481971fbb1c1385c0e3/FLAGae4e90450 [2021-12-17 09:46:18,418 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:46:18,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-12-17 09:46:18,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cd13610/59c69218fbc04481971fbb1c1385c0e3/FLAGae4e90450 [2021-12-17 09:46:18,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cd13610/59c69218fbc04481971fbb1c1385c0e3 [2021-12-17 09:46:18,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:46:18,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:46:18,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:46:18,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:46:18,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:46:18,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60976443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18, skipping insertion in model container [2021-12-17 09:46:18,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:46:18,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:46:18,599 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/loop-acceleration/diamond_1-2.c[373,386] [2021-12-17 09:46:18,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:46:18,616 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:46:18,625 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/loop-acceleration/diamond_1-2.c[373,386] [2021-12-17 09:46:18,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:46:18,642 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:46:18,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18 WrapperNode [2021-12-17 09:46:18,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:46:18,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:46:18,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:46:18,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:46:18,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,668 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29 [2021-12-17 09:46:18,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:46:18,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:46:18,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:46:18,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:46:18,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:46:18,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:46:18,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:46:18,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:46:18,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (1/1) ... [2021-12-17 09:46:18,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:46:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:46:18,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 09:46:18,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 09:46:18,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:46:18,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:46:18,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:46:18,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:46:18,825 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:46:18,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:46:18,949 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:46:18,953 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:46:18,963 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 09:46:18,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:46:18 BoogieIcfgContainer [2021-12-17 09:46:18,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:46:18,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:46:18,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:46:18,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:46:18,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:46:18" (1/3) ... [2021-12-17 09:46:18,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561f01ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:46:18, skipping insertion in model container [2021-12-17 09:46:18,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:46:18" (2/3) ... [2021-12-17 09:46:18,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561f01ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:46:18, skipping insertion in model container [2021-12-17 09:46:18,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:46:18" (3/3) ... [2021-12-17 09:46:18,971 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2021-12-17 09:46:18,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:46:18,974 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:46:19,005 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:46:19,009 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 09:46:19,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:46:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:46:19,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:19,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:46:19,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-12-17 09:46:19,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:19,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248224325] [2021-12-17 09:46:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:19,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:19,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248224325] [2021-12-17 09:46:19,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248224325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:46:19,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:46:19,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 09:46:19,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676670582] [2021-12-17 09:46:19,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:46:19,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 09:46:19,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 09:46:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:46:19,170 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:19,179 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-17 09:46:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 09:46:19,182 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 09:46:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:19,187 INFO L225 Difference]: With dead ends: 20 [2021-12-17 09:46:19,187 INFO L226 Difference]: Without dead ends: 8 [2021-12-17 09:46:19,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:46:19,193 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:46:19,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:46:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-17 09:46:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-17 09:46:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-12-17 09:46:19,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-12-17 09:46:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:19,214 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-12-17 09:46:19,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-12-17 09:46:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:46:19,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:19,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:46:19,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:46:19,216 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-12-17 09:46:19,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:19,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441760739] [2021-12-17 09:46:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:19,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:19,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:19,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441760739] [2021-12-17 09:46:19,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441760739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:46:19,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:46:19,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:46:19,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207576437] [2021-12-17 09:46:19,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:46:19,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:46:19,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:46:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:46:19,334 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:19,362 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-12-17 09:46:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:46:19,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 09:46:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:19,363 INFO L225 Difference]: With dead ends: 14 [2021-12-17 09:46:19,363 INFO L226 Difference]: Without dead ends: 10 [2021-12-17 09:46:19,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:46:19,365 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:46:19,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:46:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-17 09:46:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-12-17 09:46:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-17 09:46:19,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-17 09:46:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:19,367 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-17 09:46:19,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-17 09:46:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 09:46:19,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:19,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:19,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:46:19,368 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2021-12-17 09:46:19,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:19,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989528137] [2021-12-17 09:46:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:19,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:19,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989528137] [2021-12-17 09:46:19,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989528137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:46:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246124419] [2021-12-17 09:46:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:19,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:46:19,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:46:19,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 09:46:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 09:46:19,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:46:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:19,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:46:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:19,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246124419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:46:19,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:46:19,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 09:46:19,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715014764] [2021-12-17 09:46:19,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:46:19,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 09:46:19,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 09:46:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:46:19,548 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:19,598 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2021-12-17 09:46:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 09:46:19,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 09:46:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:19,599 INFO L225 Difference]: With dead ends: 21 [2021-12-17 09:46:19,599 INFO L226 Difference]: Without dead ends: 17 [2021-12-17 09:46:19,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-12-17 09:46:19,600 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:46:19,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:46:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-17 09:46:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-12-17 09:46:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-12-17 09:46:19,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2021-12-17 09:46:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:19,604 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-12-17 09:46:19,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-12-17 09:46:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 09:46:19,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:19,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:19,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:46:19,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:19,823 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1979276421, now seen corresponding path program 2 times [2021-12-17 09:46:19,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:19,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303315412] [2021-12-17 09:46:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:19,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:19,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303315412] [2021-12-17 09:46:19,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303315412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:46:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682893056] [2021-12-17 09:46:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:46:19,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:46:19,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:46:19,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 09:46:19,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:46:19,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:46:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 09:46:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:46:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:20,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:46:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:20,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682893056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:46:20,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:46:20,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-17 09:46:20,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220000628] [2021-12-17 09:46:20,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:46:20,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:46:20,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:46:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:46:20,141 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:20,450 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2021-12-17 09:46:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 09:46:20,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-17 09:46:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:20,451 INFO L225 Difference]: With dead ends: 42 [2021-12-17 09:46:20,451 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 09:46:20,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-12-17 09:46:20,453 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:46:20,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:46:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 09:46:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-12-17 09:46:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-12-17 09:46:20,457 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2021-12-17 09:46:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:20,457 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-12-17 09:46:20,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-12-17 09:46:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 09:46:20,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:20,458 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:20,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 09:46:20,658 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,SelfDestructingSolverStorable3 [2021-12-17 09:46:20,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:20,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1371031502, now seen corresponding path program 1 times [2021-12-17 09:46:20,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:20,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735306634] [2021-12-17 09:46:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:20,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 09:46:20,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735306634] [2021-12-17 09:46:20,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735306634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:46:20,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:46:20,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:46:20,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125643724] [2021-12-17 09:46:20,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:46:20,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:46:20,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:20,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:46:20,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:46:20,685 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:20,695 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2021-12-17 09:46:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:46:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-17 09:46:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:20,696 INFO L225 Difference]: With dead ends: 59 [2021-12-17 09:46:20,697 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 09:46:20,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:46:20,698 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 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 [2021-12-17 09:46:20,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:46:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 09:46:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-12-17 09:46:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-17 09:46:20,703 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 20 [2021-12-17 09:46:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:20,703 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-17 09:46:20,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-17 09:46:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 09:46:20,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:20,704 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:20,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 09:46:20,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1632628134, now seen corresponding path program 1 times [2021-12-17 09:46:20,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:20,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243959052] [2021-12-17 09:46:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:20,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:20,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243959052] [2021-12-17 09:46:20,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243959052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:46:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410355655] [2021-12-17 09:46:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:20,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:46:20,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:46:20,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 09:46:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 09:46:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:46:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:20,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:46:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:21,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410355655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:46:21,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:46:21,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-17 09:46:21,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177164793] [2021-12-17 09:46:21,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:46:21,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 09:46:21,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 09:46:21,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-12-17 09:46:21,089 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:22,141 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2021-12-17 09:46:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 09:46:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-17 09:46:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:22,143 INFO L225 Difference]: With dead ends: 119 [2021-12-17 09:46:22,143 INFO L226 Difference]: Without dead ends: 115 [2021-12-17 09:46:22,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-12-17 09:46:22,144 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:46:22,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 09:46:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-17 09:46:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 58. [2021-12-17 09:46:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-17 09:46:22,152 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 20 [2021-12-17 09:46:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:22,152 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-17 09:46:22,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-17 09:46:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 09:46:22,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:22,153 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:22,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 09:46:22,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:22,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1066218333, now seen corresponding path program 3 times [2021-12-17 09:46:22,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:22,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040047278] [2021-12-17 09:46:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:22,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:22,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040047278] [2021-12-17 09:46:22,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040047278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:46:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723963655] [2021-12-17 09:46:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:46:22,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:22,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:46:22,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:46:22,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 09:46:22,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-17 09:46:22,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:46:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 09:46:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:46:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:22,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:46:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:22,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723963655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:46:22,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:46:22,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-17 09:46:22,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894026474] [2021-12-17 09:46:22,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:46:22,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 09:46:22,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 09:46:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-12-17 09:46:22,972 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:26,203 INFO L93 Difference]: Finished difference Result 201 states and 247 transitions. [2021-12-17 09:46:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 09:46:26,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-17 09:46:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:26,205 INFO L225 Difference]: With dead ends: 201 [2021-12-17 09:46:26,205 INFO L226 Difference]: Without dead ends: 197 [2021-12-17 09:46:26,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 09:46:26,206 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 09:46:26,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 45 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 09:46:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-17 09:46:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 82. [2021-12-17 09:46:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 81 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-12-17 09:46:26,225 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 26 [2021-12-17 09:46:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:26,225 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-12-17 09:46:26,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-12-17 09:46:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 09:46:26,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:26,227 INFO L514 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:26,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 09:46:26,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:26,432 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash -477339582, now seen corresponding path program 2 times [2021-12-17 09:46:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875008733] [2021-12-17 09:46:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:26,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-17 09:46:26,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875008733] [2021-12-17 09:46:26,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875008733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:46:26,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:46:26,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:46:26,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101354987] [2021-12-17 09:46:26,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:46:26,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:46:26,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:46:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:46:26,470 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:26,483 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2021-12-17 09:46:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:46:26,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-17 09:46:26,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:26,486 INFO L225 Difference]: With dead ends: 117 [2021-12-17 09:46:26,486 INFO L226 Difference]: Without dead ends: 86 [2021-12-17 09:46:26,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:46:26,487 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 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 [2021-12-17 09:46:26,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:46:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-17 09:46:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-12-17 09:46:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-12-17 09:46:26,506 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 36 [2021-12-17 09:46:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:26,506 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-12-17 09:46:26,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-12-17 09:46:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 09:46:26,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:26,511 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:26,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 09:46:26,512 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1804897185, now seen corresponding path program 2 times [2021-12-17 09:46:26,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:26,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572529969] [2021-12-17 09:46:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:26,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:26,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572529969] [2021-12-17 09:46:26,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572529969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:46:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558555114] [2021-12-17 09:46:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:46:26,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:26,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:46:26,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:46:26,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 09:46:26,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:46:26,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:46:26,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 09:46:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:46:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:26,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:46:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:27,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558555114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:46:27,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:46:27,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-12-17 09:46:27,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376154300] [2021-12-17 09:46:27,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:46:27,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 09:46:27,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 09:46:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=938, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 09:46:27,459 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:41,851 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2021-12-17 09:46:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 09:46:41,851 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-17 09:46:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:41,852 INFO L225 Difference]: With dead ends: 122 [2021-12-17 09:46:41,852 INFO L226 Difference]: Without dead ends: 118 [2021-12-17 09:46:41,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=986, Invalid=1770, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 09:46:41,853 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 09:46:41,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 66 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 09:46:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-17 09:46:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-17 09:46:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2021-12-17 09:46:41,861 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 38 [2021-12-17 09:46:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:41,862 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2021-12-17 09:46:41,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2021-12-17 09:46:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 09:46:41,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:41,862 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:41,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 09:46:42,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:42,080 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1301187105, now seen corresponding path program 4 times [2021-12-17 09:46:42,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:42,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106128868] [2021-12-17 09:46:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:42,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:42,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106128868] [2021-12-17 09:46:42,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106128868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:46:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885646167] [2021-12-17 09:46:42,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:46:42,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:42,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:46:42,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:46:42,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 09:46:42,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:46:42,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:46:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 09:46:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:46:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:42,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:46:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:46:43,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885646167] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:46:43,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:46:43,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-17 09:46:43,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732675991] [2021-12-17 09:46:43,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:46:43,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 09:46:43,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 09:46:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 09:46:43,525 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:13,447 INFO L93 Difference]: Finished difference Result 170 states and 195 transitions. [2021-12-17 09:48:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 09:48:13,448 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-17 09:48:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:13,449 INFO L225 Difference]: With dead ends: 170 [2021-12-17 09:48:13,449 INFO L226 Difference]: Without dead ends: 166 [2021-12-17 09:48:13,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 89.7s TimeCoverageRelationStatistics Valid=1747, Invalid=3222, Unknown=1, NotChecked=0, Total=4970 [2021-12-17 09:48:13,451 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:13,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 75 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 09:48:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-17 09:48:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-12-17 09:48:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2021-12-17 09:48:13,459 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 50 [2021-12-17 09:48:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:13,460 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2021-12-17 09:48:13,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2021-12-17 09:48:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 09:48:13,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:13,461 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:13,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 09:48:13,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:13,676 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2069904727, now seen corresponding path program 3 times [2021-12-17 09:48:13,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:13,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539133400] [2021-12-17 09:48:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:13,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:14,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539133400] [2021-12-17 09:48:14,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539133400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:48:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263275093] [2021-12-17 09:48:14,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:48:14,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:14,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:48:14,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:48:14,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 09:48:15,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-12-17 09:48:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:48:15,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-17 09:48:15,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:48:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:15,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:48:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-17 09:48:15,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263275093] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:48:15,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:48:15,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 6] total 42 [2021-12-17 09:48:15,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342253092] [2021-12-17 09:48:15,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:48:15,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 09:48:15,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 09:48:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 09:48:15,865 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:17,291 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2021-12-17 09:48:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 09:48:17,292 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-17 09:48:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:17,292 INFO L225 Difference]: With dead ends: 181 [2021-12-17 09:48:17,292 INFO L226 Difference]: Without dead ends: 175 [2021-12-17 09:48:17,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=3347, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 09:48:17,294 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 3083 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:17,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3083 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 09:48:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-17 09:48:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2021-12-17 09:48:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-12-17 09:48:17,302 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 74 [2021-12-17 09:48:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:17,303 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-12-17 09:48:17,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-12-17 09:48:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 09:48:17,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:17,304 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:17,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 09:48:17,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:17,509 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:17,509 INFO L85 PathProgramCache]: Analyzing trace with hash 658927354, now seen corresponding path program 4 times [2021-12-17 09:48:17,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:17,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296762110] [2021-12-17 09:48:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:17,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:18,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:18,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296762110] [2021-12-17 09:48:18,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296762110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:48:18,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083182466] [2021-12-17 09:48:18,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:48:18,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:18,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:48:18,146 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) [2021-12-17 09:48:18,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 09:48:18,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:48:18,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:48:18,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-17 09:48:18,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:48:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:18,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:48:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:20,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083182466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:48:20,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:48:20,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2021-12-17 09:48:20,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089517719] [2021-12-17 09:48:20,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:48:20,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 09:48:20,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 09:48:20,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1515, Invalid=4035, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 09:48:20,437 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 75 states, 75 states have (on average 2.0) internal successors, (150), 75 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:55:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:55:15,576 INFO L93 Difference]: Finished difference Result 248 states and 268 transitions. [2021-12-17 09:55:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-17 09:55:15,577 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 75 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-17 09:55:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:55:15,578 INFO L225 Difference]: With dead ends: 248 [2021-12-17 09:55:15,578 INFO L226 Difference]: Without dead ends: 244 [2021-12-17 09:55:15,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 415.3s TimeCoverageRelationStatistics Valid=4126, Invalid=7850, Unknown=14, NotChecked=0, Total=11990 [2021-12-17 09:55:15,581 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 4194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:55:15,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 114 Invalid, 4194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 3460 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 09:55:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-17 09:55:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-12-17 09:55:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:55:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2021-12-17 09:55:15,592 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 76 [2021-12-17 09:55:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:55:15,593 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2021-12-17 09:55:15,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 75 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:55:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2021-12-17 09:55:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 09:55:15,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:55:15,594 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-12-17 09:55:15,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 09:55:15,799 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,SelfDestructingSolverStorable11 [2021-12-17 09:55:15,800 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:55:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:55:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1635773527, now seen corresponding path program 5 times [2021-12-17 09:55:15,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:55:15,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092396707] [2021-12-17 09:55:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:55:15,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:55:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:55:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:55:16,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:55:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092396707] [2021-12-17 09:55:16,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092396707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:55:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182664320] [2021-12-17 09:55:16,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 09:55:16,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:55:16,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:55:16,759 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) [2021-12-17 09:55:16,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 09:56:15,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-17 09:56:15,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:56:15,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-17 09:56:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:56:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:56:16,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:56:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:56:18,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182664320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:56:18,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:56:18,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-17 09:56:18,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277438632] [2021-12-17 09:56:18,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:56:18,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-17 09:56:18,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:56:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-17 09:56:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1505, Invalid=7807, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 09:56:18,625 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:58:35,209 INFO L93 Difference]: Finished difference Result 256 states and 261 transitions. [2021-12-17 09:58:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-17 09:58:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-17 09:58:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:58:35,211 INFO L225 Difference]: With dead ends: 256 [2021-12-17 09:58:35,211 INFO L226 Difference]: Without dead ends: 252 [2021-12-17 09:58:35,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 137.1s TimeCoverageRelationStatistics Valid=4922, Invalid=15100, Unknown=0, NotChecked=0, Total=20022 [2021-12-17 09:58:35,214 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 96 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 4774 mSolverCounterSat, 1268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 6042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1268 IncrementalHoareTripleChecker+Valid, 4774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 09:58:35,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 159 Invalid, 6042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1268 Valid, 4774 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 09:58:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-17 09:58:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-12-17 09:58:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0119521912350598) internal successors, (254), 251 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2021-12-17 09:58:35,223 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 98 [2021-12-17 09:58:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:58:35,223 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2021-12-17 09:58:35,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2021-12-17 09:58:35,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 09:58:35,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:58:35,225 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-12-17 09:58:35,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 09:58:35,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 09:58:35,434 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:58:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:58:35,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1185534101, now seen corresponding path program 6 times [2021-12-17 09:58:35,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:58:35,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81824102] [2021-12-17 09:58:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:58:35,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:58:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 09:58:35,474 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 09:58:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 09:58:35,532 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 09:58:35,533 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 09:58:35,533 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 09:58:35,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 09:58:35,537 INFO L732 BasicCegarLoop]: Path program histogram: [6, 4, 2, 1, 1] [2021-12-17 09:58:35,539 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 09:58:35,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:58:35 BoogieIcfgContainer [2021-12-17 09:58:35,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 09:58:35,612 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 09:58:35,612 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 09:58:35,612 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 09:58:35,613 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:46:18" (3/4) ... [2021-12-17 09:58:35,614 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 09:58:35,674 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 09:58:35,674 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 09:58:35,675 INFO L158 Benchmark]: Toolchain (without parser) took 737233.15ms. Allocated memory was 83.9MB in the beginning and 121.6MB in the end (delta: 37.7MB). Free memory was 42.2MB in the beginning and 26.7MB in the end (delta: 15.6MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. [2021-12-17 09:58:35,675 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:58:35,675 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.20ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 42.0MB in the beginning and 76.3MB in the end (delta: -34.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 09:58:35,676 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.13ms. Allocated memory is still 100.7MB. Free memory was 76.3MB in the beginning and 74.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:58:35,676 INFO L158 Benchmark]: Boogie Preprocessor took 36.16ms. Allocated memory is still 100.7MB. Free memory was 74.7MB in the beginning and 73.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 09:58:35,676 INFO L158 Benchmark]: RCFGBuilder took 258.29ms. Allocated memory is still 100.7MB. Free memory was 73.5MB in the beginning and 75.5MB in the end (delta: -2.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-17 09:58:35,677 INFO L158 Benchmark]: TraceAbstraction took 736645.36ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 75.0MB in the beginning and 33.0MB in the end (delta: 41.9MB). Peak memory consumption was 64.5MB. Max. memory is 16.1GB. [2021-12-17 09:58:35,677 INFO L158 Benchmark]: Witness Printer took 62.36ms. Allocated memory is still 121.6MB. Free memory was 33.0MB in the beginning and 26.7MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-17 09:58:35,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 198.20ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 42.0MB in the beginning and 76.3MB in the end (delta: -34.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.13ms. Allocated memory is still 100.7MB. Free memory was 76.3MB in the beginning and 74.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.16ms. Allocated memory is still 100.7MB. Free memory was 74.7MB in the beginning and 73.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 258.29ms. Allocated memory is still 100.7MB. Free memory was 73.5MB in the beginning and 75.5MB in the end (delta: -2.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 736645.36ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 75.0MB in the beginning and 33.0MB in the end (delta: 41.9MB). Peak memory consumption was 64.5MB. Max. memory is 16.1GB. * Witness Printer took 62.36ms. Allocated memory is still 121.6MB. Free memory was 33.0MB in the beginning and 26.7MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 VAL [x=0] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=2, y=1] [L17] COND TRUE x < 99 VAL [x=2, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=4, y=1] [L17] COND TRUE x < 99 VAL [x=4, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=6, y=1] [L17] COND TRUE x < 99 VAL [x=6, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=8, y=1] [L17] COND TRUE x < 99 VAL [x=8, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=10, y=1] [L17] COND TRUE x < 99 VAL [x=10, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=12, y=1] [L17] COND TRUE x < 99 VAL [x=12, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=14, y=1] [L17] COND TRUE x < 99 VAL [x=14, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=16, y=1] [L17] COND TRUE x < 99 VAL [x=16, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=18, y=1] [L17] COND TRUE x < 99 VAL [x=18, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=20, y=1] [L17] COND TRUE x < 99 VAL [x=20, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=22, y=1] [L17] COND TRUE x < 99 VAL [x=22, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=24, y=1] [L17] COND TRUE x < 99 VAL [x=24, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=26, y=1] [L17] COND TRUE x < 99 VAL [x=26, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=28, y=1] [L17] COND TRUE x < 99 VAL [x=28, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=30, y=1] [L17] COND TRUE x < 99 VAL [x=30, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=32, y=1] [L17] COND TRUE x < 99 VAL [x=32, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=34, y=1] [L17] COND TRUE x < 99 VAL [x=34, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=36, y=1] [L17] COND TRUE x < 99 VAL [x=36, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=38, y=1] [L17] COND TRUE x < 99 VAL [x=38, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=40, y=1] [L17] COND TRUE x < 99 VAL [x=40, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=42, y=1] [L17] COND TRUE x < 99 VAL [x=42, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=44, y=1] [L17] COND TRUE x < 99 VAL [x=44, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=46, y=1] [L17] COND TRUE x < 99 VAL [x=46, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=48, y=1] [L17] COND TRUE x < 99 VAL [x=48, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=50, y=1] [L17] COND TRUE x < 99 VAL [x=50, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=52, y=1] [L17] COND TRUE x < 99 VAL [x=52, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=54, y=1] [L17] COND TRUE x < 99 VAL [x=54, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=56, y=1] [L17] COND TRUE x < 99 VAL [x=56, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=58, y=1] [L17] COND TRUE x < 99 VAL [x=58, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=60, y=1] [L17] COND TRUE x < 99 VAL [x=60, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=62, y=1] [L17] COND TRUE x < 99 VAL [x=62, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=64, y=1] [L17] COND TRUE x < 99 VAL [x=64, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=66, y=1] [L17] COND TRUE x < 99 VAL [x=66, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=68, y=1] [L17] COND TRUE x < 99 VAL [x=68, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=70, y=1] [L17] COND TRUE x < 99 VAL [x=70, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=72, y=1] [L17] COND TRUE x < 99 VAL [x=72, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=74, y=1] [L17] COND TRUE x < 99 VAL [x=74, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=76, y=1] [L17] COND TRUE x < 99 VAL [x=76, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=78, y=1] [L17] COND TRUE x < 99 VAL [x=78, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=80, y=1] [L17] COND TRUE x < 99 VAL [x=80, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=82, y=1] [L17] COND TRUE x < 99 VAL [x=82, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=84, y=1] [L17] COND TRUE x < 99 VAL [x=84, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=86, y=1] [L17] COND TRUE x < 99 VAL [x=86, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=88, y=1] [L17] COND TRUE x < 99 VAL [x=88, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=90, y=1] [L17] COND TRUE x < 99 VAL [x=90, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=92, y=1] [L17] COND TRUE x < 99 VAL [x=92, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=94, y=1] [L17] COND TRUE x < 99 VAL [x=94, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=96, y=1] [L17] COND TRUE x < 99 VAL [x=96, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=98, y=1] [L17] COND TRUE x < 99 VAL [x=98, y=1] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=100, y=1] [L17] COND FALSE !(x < 99) VAL [x=100, y=1] [L25] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 736.5s, OverallIterations: 14, TraceHistogramMax: 50, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 662.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 377 SdHoareTripleChecker+Valid, 8.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 377 mSDsluCounter, 712 SdHoareTripleChecker+Invalid, 7.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 617 mSDsCounter, 2792 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14180 IncrementalHoareTripleChecker+Invalid, 16972 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2792 mSolverCounterUnsat, 95 mSDtfsCounter, 14180 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1172 GetRequests, 645 SyntacticMatches, 19 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4043 ImplicationChecksByTransitivity, 661.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=252occurred in iteration=13, InterpolantAutomatonStates: 387, 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, 13 MinimizatonAttempts, 201 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 60.3s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 982 NumberOfCodeBlocks, 982 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 1249 ConstructedInterpolants, 0 QuantifiedInterpolants, 7583 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1107 ConjunctsInSsa, 380 ConjunctsInUnsatCore, 31 InterpolantComputations, 4 PerfectInterpolantSequences, 818/16483 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! [2021-12-17 09:58:35,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE