./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/cart.i --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/heap-data/cart.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85f7d1ed54d862786907cd1b4275170af31fb3969b21d7a2f2e5e352106544af --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:10:13,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:10:13,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:10:13,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:10:13,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:10:13,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:10:13,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:10:13,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:10:13,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:10:13,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:10:13,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:10:13,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:10:13,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:10:13,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:10:13,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:10:13,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:10:13,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:10:13,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:10:13,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:10:13,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:10:13,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:10:13,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:10:13,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:10:13,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:10:13,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:10:13,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:10:13,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:10:13,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:10:13,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:10:13,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:10:13,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:10:13,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:10:13,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:10:13,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:10:13,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:10:13,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:10:13,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:10:13,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:10:13,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:10:13,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:10:13,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:10:13,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:10:13,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:10:13,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:10:13,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:10:13,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:10:13,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:10:13,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:10:13,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:10:13,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:10:13,692 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:10:13,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:10:13,693 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:10:13,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:10:13,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:10:13,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:10:13,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:10:13,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:10:13,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:10:13,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:10:13,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:10:13,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:10:13,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:10:13,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:10:13,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:10:13,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:10:13,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:10:13,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:10:13,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:10:13,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:10:13,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:10:13,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:10:13,696 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:10:13,696 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:10:13,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:10:13,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:10:13,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f7d1ed54d862786907cd1b4275170af31fb3969b21d7a2f2e5e352106544af [2021-12-17 09:10:13,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:10:13,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:10:13,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:10:13,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:10:13,933 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:10:13,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/cart.i [2021-12-17 09:10:13,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2129e61/35894fa5866c411d998690e7304593d1/FLAGb85d41854 [2021-12-17 09:10:14,369 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:10:14,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/cart.i [2021-12-17 09:10:14,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2129e61/35894fa5866c411d998690e7304593d1/FLAGb85d41854 [2021-12-17 09:10:14,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2129e61/35894fa5866c411d998690e7304593d1 [2021-12-17 09:10:14,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:10:14,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:10:14,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:10:14,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:10:14,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:10:14,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779eba33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14, skipping insertion in model container [2021-12-17 09:10:14,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:10:14,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:10:14,636 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/heap-data/cart.i[23713,23726] [2021-12-17 09:10:14,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:10:14,644 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:10:14,686 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/heap-data/cart.i[23713,23726] [2021-12-17 09:10:14,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:10:14,709 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:10:14,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14 WrapperNode [2021-12-17 09:10:14,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:10:14,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:10:14,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:10:14,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:10:14,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,756 INFO L137 Inliner]: procedures = 121, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-17 09:10:14,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:10:14,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:10:14,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:10:14,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:10:14,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:10:14,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:10:14,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:10:14,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:10:14,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (1/1) ... [2021-12-17 09:10:14,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:10:14,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:10:14,822 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 09:10:14,836 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 09:10:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 09:10:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 09:10:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 09:10:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:10:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 09:10:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 09:10:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:10:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:10:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:10:14,922 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:10:14,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:10:15,096 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:10:15,100 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:10:15,100 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 09:10:15,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:10:15 BoogieIcfgContainer [2021-12-17 09:10:15,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:10:15,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:10:15,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:10:15,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:10:15,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:10:14" (1/3) ... [2021-12-17 09:10:15,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479a5344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:10:15, skipping insertion in model container [2021-12-17 09:10:15,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:10:14" (2/3) ... [2021-12-17 09:10:15,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479a5344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:10:15, skipping insertion in model container [2021-12-17 09:10:15,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:10:15" (3/3) ... [2021-12-17 09:10:15,107 INFO L111 eAbstractionObserver]: Analyzing ICFG cart.i [2021-12-17 09:10:15,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:10:15,110 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:10:15,151 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:10:15,156 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 09:10:15,157 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:10:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:10:15,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 09:10:15,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:15,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:15,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -680841488, now seen corresponding path program 1 times [2021-12-17 09:10:15,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:15,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675562272] [2021-12-17 09:10:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:15,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:15,302 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 09:10:15,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:15,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675562272] [2021-12-17 09:10:15,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675562272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:10:15,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:10:15,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 09:10:15,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702245198] [2021-12-17 09:10:15,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:10:15,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 09:10:15,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 09:10:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:10:15,332 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 09:10:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:15,343 INFO L93 Difference]: Finished difference Result 34 states and 49 transitions. [2021-12-17 09:10:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 09:10:15,345 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) Word has length 9 [2021-12-17 09:10:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:15,350 INFO L225 Difference]: With dead ends: 34 [2021-12-17 09:10:15,351 INFO L226 Difference]: Without dead ends: 17 [2021-12-17 09:10:15,353 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 09:10:15,355 INFO L933 BasicCegarLoop]: 25 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, 25 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 09:10:15,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:10:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-17 09:10:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-17 09:10:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:10:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-12-17 09:10:15,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2021-12-17 09:10:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:15,391 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-12-17 09:10:15,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 09:10:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-12-17 09:10:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 09:10:15,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:15,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:15,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:10:15,393 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1910225148, now seen corresponding path program 1 times [2021-12-17 09:10:15,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:15,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794817062] [2021-12-17 09:10:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:15,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:15,484 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 09:10:15,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:15,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794817062] [2021-12-17 09:10:15,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794817062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:10:15,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:10:15,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 09:10:15,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463252049] [2021-12-17 09:10:15,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:10:15,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 09:10:15,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 09:10:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 09:10:15,489 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 09:10:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:15,536 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-12-17 09:10:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 09:10:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2021-12-17 09:10:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:15,538 INFO L225 Difference]: With dead ends: 36 [2021-12-17 09:10:15,538 INFO L226 Difference]: Without dead ends: 21 [2021-12-17 09:10:15,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 09:10:15,542 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:10:15,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:10:15,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-17 09:10:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-17 09:10:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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 09:10:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-12-17 09:10:15,550 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2021-12-17 09:10:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:15,551 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-17 09:10:15,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 09:10:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-12-17 09:10:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 09:10:15,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:15,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:15,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:10:15,555 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1849394690, now seen corresponding path program 1 times [2021-12-17 09:10:15,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:15,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665294862] [2021-12-17 09:10:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:15,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:15,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665294862] [2021-12-17 09:10:15,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665294862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:10:15,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:10:15,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 09:10:15,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043239522] [2021-12-17 09:10:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:10:15,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 09:10:15,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 09:10:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 09:10:15,613 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 09:10:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:15,645 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-17 09:10:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 09:10:15,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-12-17 09:10:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:15,647 INFO L225 Difference]: With dead ends: 36 [2021-12-17 09:10:15,647 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 09:10:15,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 09:10:15,653 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:10:15,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:10:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 09:10:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-12-17 09:10:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:10:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-12-17 09:10:15,660 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 16 [2021-12-17 09:10:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:15,660 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-12-17 09:10:15,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 09:10:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-12-17 09:10:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 09:10:15,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:15,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:15,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 09:10:15,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:15,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1690179633, now seen corresponding path program 1 times [2021-12-17 09:10:15,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:15,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872279720] [2021-12-17 09:10:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:15,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:10:15,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:15,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872279720] [2021-12-17 09:10:15,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872279720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:10:15,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:10:15,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:10:15,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091506909] [2021-12-17 09:10:15,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:10:15,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:10:15,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:15,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:10:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:10:15,723 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 09:10:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:15,731 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-12-17 09:10:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:10:15,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 09:10:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:15,732 INFO L225 Difference]: With dead ends: 37 [2021-12-17 09:10:15,732 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 09:10:15,732 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 09:10:15,733 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:10:15,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:10:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 09:10:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 09:10:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 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 09:10:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-12-17 09:10:15,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 20 [2021-12-17 09:10:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:15,737 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-12-17 09:10:15,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 09:10:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-12-17 09:10:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 09:10:15,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:15,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:15,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 09:10:15,738 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:15,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1795441037, now seen corresponding path program 1 times [2021-12-17 09:10:15,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:15,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67787408] [2021-12-17 09:10:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:15,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:15,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:15,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67787408] [2021-12-17 09:10:15,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67787408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:10:15,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359645615] [2021-12-17 09:10:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:15,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:15,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:10:15,909 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 09:10:15,910 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 09:10:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:16,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 09:10:16,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:10:16,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-12-17 09:10:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:16,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-12-17 09:10:16,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:16,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-17 09:10:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:16,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:10:16,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:16,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 492 treesize of output 480 [2021-12-17 09:10:16,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:10:16,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-17 09:10:16,477 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-12-17 09:10:16,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 308 [2021-12-17 09:10:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:10:16,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359645615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:10:16,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:10:16,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-17 09:10:16,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22498105] [2021-12-17 09:10:16,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:10:16,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:10:16,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:10:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:10:16,838 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:10:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:16,990 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-12-17 09:10:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 09:10:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-17 09:10:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:16,991 INFO L225 Difference]: With dead ends: 48 [2021-12-17 09:10:16,991 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 09:10:16,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-17 09:10:16,992 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:10:16,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 125 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 78 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-12-17 09:10:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 09:10:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2021-12-17 09:10:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 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 09:10:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-12-17 09:10:16,996 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 20 [2021-12-17 09:10:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:16,996 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-12-17 09:10:16,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:10:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-12-17 09:10:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 09:10:16,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:16,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:17,021 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 09:10:17,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:17,204 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1534874359, now seen corresponding path program 1 times [2021-12-17 09:10:17,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:17,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296682617] [2021-12-17 09:10:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:17,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:10:17,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:17,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296682617] [2021-12-17 09:10:17,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296682617] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:10:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95198563] [2021-12-17 09:10:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:17,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:10:17,294 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 09:10:17,295 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 09:10:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 09:10:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:10:17,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 09:10:17,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 09:10:17,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-17 09:10:17,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-17 09:10:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:17,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:10:17,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-12-17 09:10:17,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:17,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2021-12-17 09:10:17,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-12-17 09:10:17,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:17,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2021-12-17 09:10:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:10:17,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95198563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:10:17,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:10:17,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2021-12-17 09:10:17,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300790309] [2021-12-17 09:10:17,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:10:17,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:10:17,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:10:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:10:17,664 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 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 09:10:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:17,828 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2021-12-17 09:10:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 09:10:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-17 09:10:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:17,829 INFO L225 Difference]: With dead ends: 59 [2021-12-17 09:10:17,829 INFO L226 Difference]: Without dead ends: 49 [2021-12-17 09:10:17,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-17 09:10:17,830 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:10:17,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 141 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:10:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-17 09:10:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2021-12-17 09:10:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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 09:10:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-12-17 09:10:17,833 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 23 [2021-12-17 09:10:17,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:17,833 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-12-17 09:10:17,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 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 09:10:17,834 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-12-17 09:10:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 09:10:17,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:17,834 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:17,853 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 09:10:18,035 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,SelfDestructingSolverStorable5 [2021-12-17 09:10:18,036 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash 379469720, now seen corresponding path program 2 times [2021-12-17 09:10:18,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747761626] [2021-12-17 09:10:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:18,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:18,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747761626] [2021-12-17 09:10:18,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747761626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:10:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059043707] [2021-12-17 09:10:18,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:10:18,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:18,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:10:18,177 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 09:10:18,187 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 09:10:18,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:10:18,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:10:18,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 09:10:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:10:18,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:18,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:18,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-17 09:10:18,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-17 09:10:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:18,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:10:18,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:18,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:10:18,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:10:18,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 09:10:18,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 09:10:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:18,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059043707] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:10:18,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:10:18,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-12-17 09:10:18,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848456392] [2021-12-17 09:10:18,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:10:18,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 09:10:18,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:18,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 09:10:18,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 09:10:18,569 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 09:10:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:18,629 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2021-12-17 09:10:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 09:10:18,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 24 [2021-12-17 09:10:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:18,630 INFO L225 Difference]: With dead ends: 67 [2021-12-17 09:10:18,630 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 09:10:18,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 09:10:18,631 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:10:18,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 102 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-12-17 09:10:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 09:10:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-17 09:10:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 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 09:10:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2021-12-17 09:10:18,634 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2021-12-17 09:10:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:18,634 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2021-12-17 09:10:18,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 09:10:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2021-12-17 09:10:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 09:10:18,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:18,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:18,658 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 09:10:18,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:18,835 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash -3886178, now seen corresponding path program 3 times [2021-12-17 09:10:18,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:18,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918355745] [2021-12-17 09:10:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:18,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:18,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918355745] [2021-12-17 09:10:18,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918355745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:10:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383173948] [2021-12-17 09:10:18,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:10:18,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:10:18,980 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 09:10:18,982 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 09:10:19,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 09:10:19,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:10:19,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 09:10:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:10:19,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 09:10:19,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:19,126 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-17 09:10:19,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 09:10:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-17 09:10:19,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-17 09:10:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2021-12-17 09:10:19,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-17 09:10:19,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-12-17 09:10:19,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:19,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-17 09:10:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:19,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:10:19,285 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_402 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_402) |c_ULTIMATE.start_main_~l~0#1.base|))) (<= (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4))))) is different from false [2021-12-17 09:10:19,357 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_401 Int) (v_ArrVal_402 (Array Int Int)) (v_ArrVal_398 Int) (v_ArrVal_396 Int) (v_ArrVal_395 Int) (v_ArrVal_394 Int)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 8)) (.cse3 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 4))) (or (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse1 .cse2 v_ArrVal_395) .cse3 v_ArrVal_401)) (select (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|) .cse2 v_ArrVal_396) .cse3 v_ArrVal_398) |c_ULTIMATE.start_main_~i~0#1.offset|) v_ArrVal_402) |c_ULTIMATE.start_main_~l~0#1.base|))) (<= (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)))) (< v_ArrVal_401 (select (store .cse1 .cse2 v_ArrVal_394) .cse3)) (< |c_ULTIMATE.start_main_~order~0#1| v_ArrVal_395)))) |c_ULTIMATE.start_main_#t~short8#1|) is different from false [2021-12-17 09:10:19,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:19,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 85 [2021-12-17 09:10:19,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:19,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 82 [2021-12-17 09:10:19,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:10:19,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-17 09:10:19,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:10:19,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:10:19,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:19,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-12-17 09:10:19,414 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 09:10:19,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2021-12-17 09:10:19,451 INFO L354 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2021-12-17 09:10:19,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 66 [2021-12-17 09:10:19,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-17 09:10:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-17 09:10:19,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383173948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:10:19,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:10:19,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-17 09:10:19,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911965329] [2021-12-17 09:10:19,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:10:19,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 09:10:19,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 09:10:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=171, Unknown=2, NotChecked=54, Total=272 [2021-12-17 09:10:19,661 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:10:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:19,866 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2021-12-17 09:10:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 09:10:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-17 09:10:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:19,878 INFO L225 Difference]: With dead ends: 61 [2021-12-17 09:10:19,878 INFO L226 Difference]: Without dead ends: 56 [2021-12-17 09:10:19,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=351, Unknown=2, NotChecked=82, Total=552 [2021-12-17 09:10:19,879 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:10:19,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 187 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 87 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2021-12-17 09:10:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-17 09:10:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-12-17 09:10:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 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 09:10:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-12-17 09:10:19,887 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 28 [2021-12-17 09:10:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:19,888 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-12-17 09:10:19,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:10:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-12-17 09:10:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 09:10:19,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:19,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:19,909 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 09:10:20,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:20,090 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:20,091 INFO L85 PathProgramCache]: Analyzing trace with hash 194884952, now seen corresponding path program 2 times [2021-12-17 09:10:20,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:20,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354822553] [2021-12-17 09:10:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:20,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:20,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:20,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354822553] [2021-12-17 09:10:20,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354822553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:10:20,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835423637] [2021-12-17 09:10:20,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:10:20,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:20,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:10:20,274 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 09:10:20,288 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 09:10:20,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:10:20,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:10:20,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-17 09:10:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:10:20,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 09:10:20,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:20,422 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-17 09:10:20,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 09:10:20,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:20,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:20,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:20,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:20,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2021-12-17 09:10:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:20,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:20,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-17 09:10:20,628 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-17 09:10:20,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 99 [2021-12-17 09:10:20,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 59 [2021-12-17 09:10:20,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 68 [2021-12-17 09:10:20,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:10:20,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-12-17 09:10:20,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-12-17 09:10:20,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-12-17 09:10:20,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:20,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-17 09:10:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:20,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:10:20,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:20,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1971 treesize of output 1838 [2021-12-17 09:10:20,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:10:20,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-17 09:10:58,822 INFO L354 Elim1Store]: treesize reduction 32, result has 50.8 percent of original size [2021-12-17 09:10:58,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 162 treesize of output 153 [2021-12-17 09:10:58,895 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_540 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_540) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) |c_ULTIMATE.start_main_~i~0#1.base|)) (forall ((v_ArrVal_538 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_538) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) |c_ULTIMATE.start_main_~i~0#1.offset|))) is different from false [2021-12-17 09:10:58,918 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_531 Int) (v_ArrVal_540 (Array Int Int)) (v_ArrVal_534 Int)) (let ((.cse0 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|) (+ |c_ULTIMATE.start_main_~i~0#1.offset| 8) v_ArrVal_534) (+ |c_ULTIMATE.start_main_~i~0#1.offset| 4) v_ArrVal_531))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~i~0#1.offset|))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base| .cse0) .cse1 v_ArrVal_540) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) .cse1)))) (forall ((v_ArrVal_533 Int) (v_ArrVal_532 Int) (v_ArrVal_531 Int) (v_ArrVal_538 (Array Int Int)) (v_ArrVal_534 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 8)) (.cse4 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 4))) (let ((.cse2 (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base|) .cse3 v_ArrVal_533) .cse4 v_ArrVal_532))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| .cse2) (select (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|) .cse3 v_ArrVal_534) .cse4 v_ArrVal_531) |c_ULTIMATE.start_main_~i~0#1.offset|) v_ArrVal_538) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~i~0#1.offset|)))))) is different from false [2021-12-17 09:10:58,946 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_531 Int) (v_ArrVal_540 (Array Int Int)) (v_ArrVal_534 Int)) (let ((.cse0 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8) v_ArrVal_534) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4) v_ArrVal_531))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~l~0#1.offset|))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~l~0#1.base| .cse0) .cse1 v_ArrVal_540) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) .cse1)))) (forall ((v_ArrVal_533 Int) (v_ArrVal_532 Int) (v_ArrVal_531 Int) (v_ArrVal_538 (Array Int Int)) (v_ArrVal_534 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (.cse4 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4))) (let ((.cse2 (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~l~0#1.base|) .cse3 v_ArrVal_533) .cse4 v_ArrVal_532))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~l~0#1.base| .cse2) (select (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~l~0#1.base|) .cse3 v_ArrVal_534) .cse4 v_ArrVal_531) |c_ULTIMATE.start_main_~l~0#1.offset|) v_ArrVal_538) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~l~0#1.offset|)))))) is different from false [2021-12-17 09:10:58,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 101 [2021-12-17 09:10:58,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:58,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 96 [2021-12-17 09:10:58,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:58,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 72 [2021-12-17 09:10:58,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 91 [2021-12-17 09:10:59,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:10:59,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 74 [2021-12-17 09:10:59,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2021-12-17 09:10:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2021-12-17 09:10:59,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-12-17 09:10:59,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-17 09:10:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-12-17 09:10:59,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835423637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:10:59,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:10:59,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-17 09:10:59,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938235314] [2021-12-17 09:10:59,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:10:59,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 09:10:59,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:10:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 09:10:59,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=396, Unknown=3, NotChecked=126, Total=600 [2021-12-17 09:10:59,050 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 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 09:10:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:10:59,432 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-12-17 09:10:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 09:10:59,433 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 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 31 [2021-12-17 09:10:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:10:59,433 INFO L225 Difference]: With dead ends: 63 [2021-12-17 09:10:59,433 INFO L226 Difference]: Without dead ends: 61 [2021-12-17 09:10:59,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=586, Unknown=3, NotChecked=156, Total=870 [2021-12-17 09:10:59,434 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:10:59,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 399 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 261 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2021-12-17 09:10:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-17 09:10:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2021-12-17 09:10:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 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 09:10:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-12-17 09:10:59,438 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 31 [2021-12-17 09:10:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:10:59,438 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-12-17 09:10:59,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 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 09:10:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-12-17 09:10:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 09:10:59,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:10:59,439 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:10:59,465 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 09:10:59,639 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 09:10:59,640 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:10:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:10:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1832566487, now seen corresponding path program 4 times [2021-12-17 09:10:59,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:10:59,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518523979] [2021-12-17 09:10:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:10:59,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:10:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:10:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:10:59,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:10:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518523979] [2021-12-17 09:10:59,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518523979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:10:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380971891] [2021-12-17 09:10:59,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:10:59,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:10:59,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:10:59,746 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 09:10:59,748 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 09:10:59,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:10:59,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:10:59,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-17 09:10:59,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:10:59,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:59,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:10:59,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 09:11:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-17 09:11:00,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-17 09:11:00,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:00,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-17 09:11:00,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:00,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 09:11:00,032 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-17 09:11:00,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 09:11:00,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2021-12-17 09:11:00,140 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 09:11:00,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-12-17 09:11:00,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 09:11:00,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-12-17 09:11:00,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 53 [2021-12-17 09:11:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:00,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:00,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-17 09:11:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:00,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-17 09:11:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:11:00,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:11:00,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:11:00,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 71 [2021-12-17 09:11:00,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:11:00,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 58 [2021-12-17 09:11:00,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,510 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_8 (Array Int Int)) (v_arrayElimArr_7 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_18| Int)) (or (and (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_18| v_arrayElimArr_8) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 0) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_18| v_arrayElimArr_7) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 0)) (not (= (select v_arrayElimArr_8 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select v_arrayElimArr_7 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_18|))))) is different from false [2021-12-17 09:11:00,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-17 09:11:00,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:11:00,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 56 [2021-12-17 09:11:00,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:11:00,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-12-17 09:11:00,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:11:00,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-12-17 09:11:00,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 09:11:00,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-12-17 09:11:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-12-17 09:11:00,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380971891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:11:00,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:11:00,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-17 09:11:00,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045983229] [2021-12-17 09:11:00,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:11:00,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 09:11:00,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:11:00,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 09:11:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=150, Unknown=1, NotChecked=24, Total=210 [2021-12-17 09:11:00,782 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 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 09:11:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:11:00,901 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2021-12-17 09:11:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 09:11:00,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-17 09:11:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:11:00,902 INFO L225 Difference]: With dead ends: 89 [2021-12-17 09:11:00,902 INFO L226 Difference]: Without dead ends: 70 [2021-12-17 09:11:00,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2021-12-17 09:11:00,903 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:11:00,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 221 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2021-12-17 09:11:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-17 09:11:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-12-17 09:11:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 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 09:11:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2021-12-17 09:11:00,910 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 32 [2021-12-17 09:11:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:11:00,913 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2021-12-17 09:11:00,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 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 09:11:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2021-12-17 09:11:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 09:11:00,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:11:00,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:11:00,933 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 09:11:01,114 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 09:11:01,114 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:11:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:11:01,115 INFO L85 PathProgramCache]: Analyzing trace with hash -974282402, now seen corresponding path program 3 times [2021-12-17 09:11:01,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:11:01,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829125653] [2021-12-17 09:11:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:11:01,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:11:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:11:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:11:01,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:11:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829125653] [2021-12-17 09:11:01,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829125653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:11:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781257051] [2021-12-17 09:11:01,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:11:01,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:11:01,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:11:01,256 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 09:11:01,257 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 09:11:01,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 09:11:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:11:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 09:11:01,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:11:01,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 09:11:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 09:11:01,402 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-17 09:11:01,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 09:11:01,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 09:11:01,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 09:11:01,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2021-12-17 09:11:01,520 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-17 09:11:01,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 56 [2021-12-17 09:11:01,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-12-17 09:11:01,658 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-17 09:11:01,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-17 09:11:01,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 09:11:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:11:01,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:11:02,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:11:02,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1963 treesize of output 1959 [2021-12-17 09:11:02,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:11:02,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1857 treesize of output 1911 [2021-12-17 09:11:02,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:11:02,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1891 treesize of output 1939 Killed by 15