./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/tree-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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-manipulation/tree-3.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 3ab0e6b3adccdafccbf4f7749fddf566a909e7e6b26ed4ad49012db1c4c97a10 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:49:06,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:49:06,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:49:06,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:49:06,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:49:06,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:49:06,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:49:06,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:49:06,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:49:06,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:49:06,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:49:06,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:49:06,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:49:06,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:49:06,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:49:06,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:49:06,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:49:06,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:49:06,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:49:06,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:49:06,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:49:06,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:49:06,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:49:06,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:49:06,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:49:06,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:49:06,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:49:06,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:49:06,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:49:06,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:49:06,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:49:06,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:49:06,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:49:06,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:49:06,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:49:06,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:49:06,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:49:06,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:49:06,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:49:06,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:49:06,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:49:06,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:49:06,776 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:49:06,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:49:06,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:49:06,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:49:06,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:49:06,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:49:06,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:49:06,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:49:06,779 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:49:06,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:49:06,780 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:49:06,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:49:06,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:49:06,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:49:06,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:49:06,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:49:06,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:49:06,781 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:49:06,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:49:06,781 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:49:06,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:49:06,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:49:06,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:49:06,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:49:06,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:49:06,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:49:06,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:49:06,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:49:06,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:49:06,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:49:06,783 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:49:06,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:49:06,783 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:49:06,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:49:06,783 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:49:06,784 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ab0e6b3adccdafccbf4f7749fddf566a909e7e6b26ed4ad49012db1c4c97a10 [2023-02-16 00:49:06,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:49:06,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:49:06,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:49:06,964 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:49:06,969 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:49:06,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/tree-3.i [2023-02-16 00:49:07,946 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:49:08,161 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:49:08,161 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/tree-3.i [2023-02-16 00:49:08,169 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c8b360ea/02230b0a73a14642bbc74c8fb9f6bc62/FLAG8739902e3 [2023-02-16 00:49:08,185 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c8b360ea/02230b0a73a14642bbc74c8fb9f6bc62 [2023-02-16 00:49:08,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:49:08,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:49:08,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:49:08,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:49:08,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:49:08,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25eed2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08, skipping insertion in model container [2023-02-16 00:49:08,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:49:08,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:49:08,437 WARN L237 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-manipulation/tree-3.i[22626,22639] [2023-02-16 00:49:08,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:49:08,479 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:49:08,507 WARN L237 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-manipulation/tree-3.i[22626,22639] [2023-02-16 00:49:08,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:49:08,530 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:49:08,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08 WrapperNode [2023-02-16 00:49:08,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:49:08,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:49:08,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:49:08,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:49:08,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,565 INFO L138 Inliner]: procedures = 122, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 148 [2023-02-16 00:49:08,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:49:08,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:49:08,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:49:08,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:49:08,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,585 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:49:08,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:49:08,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:49:08,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:49:08,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (1/1) ... [2023-02-16 00:49:08,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:49:08,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:49:08,629 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) [2023-02-16 00:49:08,635 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 [2023-02-16 00:49:08,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:49:08,657 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-16 00:49:08,657 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-16 00:49:08,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:49:08,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:49:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:49:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 00:49:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 00:49:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 00:49:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:49:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:49:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:49:08,791 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:49:08,793 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:49:09,051 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:49:09,063 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:49:09,063 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-16 00:49:09,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:49:09 BoogieIcfgContainer [2023-02-16 00:49:09,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:49:09,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:49:09,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:49:09,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:49:09,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:49:08" (1/3) ... [2023-02-16 00:49:09,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f360c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:49:09, skipping insertion in model container [2023-02-16 00:49:09,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:49:08" (2/3) ... [2023-02-16 00:49:09,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f360c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:49:09, skipping insertion in model container [2023-02-16 00:49:09,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:49:09" (3/3) ... [2023-02-16 00:49:09,072 INFO L112 eAbstractionObserver]: Analyzing ICFG tree-3.i [2023-02-16 00:49:09,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:49:09,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:49:09,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:49:09,135 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f22b194, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:49:09,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:49:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 46 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 00:49:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 00:49:09,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:09,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:09,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1816113803, now seen corresponding path program 1 times [2023-02-16 00:49:09,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:09,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195074103] [2023-02-16 00:49:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:09,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:49:09,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:09,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195074103] [2023-02-16 00:49:09,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195074103] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:09,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:09,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:49:09,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993931568] [2023-02-16 00:49:09,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:09,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:49:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:49:09,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:49:09,306 INFO L87 Difference]: Start difference. First operand has 48 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 46 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:09,332 INFO L93 Difference]: Finished difference Result 92 states and 153 transitions. [2023-02-16 00:49:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:49:09,333 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 00:49:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:09,338 INFO L225 Difference]: With dead ends: 92 [2023-02-16 00:49:09,338 INFO L226 Difference]: Without dead ends: 33 [2023-02-16 00:49:09,340 INFO L412 NwaCegarLoop]: 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 [2023-02-16 00:49:09,344 INFO L413 NwaCegarLoop]: 59 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, 59 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 [2023-02-16 00:49:09,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:49:09,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-16 00:49:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-16 00:49:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-16 00:49:09,371 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 11 [2023-02-16 00:49:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:09,372 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-16 00:49:09,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-16 00:49:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 00:49:09,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:09,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:09,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 00:49:09,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:09,374 INFO L85 PathProgramCache]: Analyzing trace with hash 103834296, now seen corresponding path program 1 times [2023-02-16 00:49:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:09,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164504051] [2023-02-16 00:49:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:09,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:49:09,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:09,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164504051] [2023-02-16 00:49:09,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164504051] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:09,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:09,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:49:09,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596925341] [2023-02-16 00:49:09,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:09,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:49:09,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:09,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:49:09,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:49:09,453 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:09,496 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2023-02-16 00:49:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:49:09,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 00:49:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:09,498 INFO L225 Difference]: With dead ends: 59 [2023-02-16 00:49:09,498 INFO L226 Difference]: Without dead ends: 37 [2023-02-16 00:49:09,498 INFO L412 NwaCegarLoop]: 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 [2023-02-16 00:49:09,499 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:09,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 50 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:49:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-16 00:49:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-16 00:49:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2023-02-16 00:49:09,505 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 12 [2023-02-16 00:49:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:09,505 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2023-02-16 00:49:09,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2023-02-16 00:49:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 00:49:09,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:09,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:09,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 00:49:09,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash -705512330, now seen corresponding path program 1 times [2023-02-16 00:49:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:09,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358482775] [2023-02-16 00:49:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:09,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:49:09,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:09,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358482775] [2023-02-16 00:49:09,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358482775] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:09,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:09,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 00:49:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149212217] [2023-02-16 00:49:09,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:09,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 00:49:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 00:49:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:49:09,617 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:09,667 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2023-02-16 00:49:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 00:49:09,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 00:49:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:09,668 INFO L225 Difference]: With dead ends: 79 [2023-02-16 00:49:09,668 INFO L226 Difference]: Without dead ends: 42 [2023-02-16 00:49:09,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-16 00:49:09,669 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:09,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 143 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:49:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-16 00:49:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-02-16 00:49:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-02-16 00:49:09,674 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 12 [2023-02-16 00:49:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:09,674 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-02-16 00:49:09,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-02-16 00:49:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 00:49:09,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:09,675 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:09,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 00:49:09,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1567911269, now seen corresponding path program 1 times [2023-02-16 00:49:09,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:09,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444950227] [2023-02-16 00:49:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:09,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:49:09,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:09,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444950227] [2023-02-16 00:49:09,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444950227] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:09,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:09,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:49:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047358112] [2023-02-16 00:49:09,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:49:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:09,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:49:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:49:09,747 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:09,788 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2023-02-16 00:49:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:49:09,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-16 00:49:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:09,790 INFO L225 Difference]: With dead ends: 61 [2023-02-16 00:49:09,790 INFO L226 Difference]: Without dead ends: 41 [2023-02-16 00:49:09,791 INFO L412 NwaCegarLoop]: 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 [2023-02-16 00:49:09,795 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:09,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 58 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:49:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-16 00:49:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-02-16 00:49:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-02-16 00:49:09,799 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2023-02-16 00:49:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:09,800 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-02-16 00:49:09,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-02-16 00:49:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 00:49:09,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:09,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:09,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 00:49:09,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash 814480092, now seen corresponding path program 1 times [2023-02-16 00:49:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:09,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258543730] [2023-02-16 00:49:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:09,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 00:49:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:10,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258543730] [2023-02-16 00:49:10,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258543730] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:10,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:10,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 00:49:10,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801262796] [2023-02-16 00:49:10,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 00:49:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 00:49:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 00:49:10,122 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:10,247 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-02-16 00:49:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 00:49:10,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-16 00:49:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:10,248 INFO L225 Difference]: With dead ends: 54 [2023-02-16 00:49:10,249 INFO L226 Difference]: Without dead ends: 51 [2023-02-16 00:49:10,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-16 00:49:10,253 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 142 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:10,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 71 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:49:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-16 00:49:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2023-02-16 00:49:10,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-02-16 00:49:10,268 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2023-02-16 00:49:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:10,268 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-02-16 00:49:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-02-16 00:49:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 00:49:10,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:10,273 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:10,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 00:49:10,273 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:10,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:10,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1177025307, now seen corresponding path program 1 times [2023-02-16 00:49:10,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:10,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854389861] [2023-02-16 00:49:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:10,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:49:18,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:18,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854389861] [2023-02-16 00:49:18,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854389861] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:49:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665243462] [2023-02-16 00:49:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:18,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:49:18,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:49:18,962 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) [2023-02-16 00:49:18,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:49:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:19,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 178 conjunts are in the unsatisfiable core [2023-02-16 00:49:19,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:49:19,186 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 00:49:19,263 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 00:49:19,269 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 00:49:19,279 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-16 00:49:19,279 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 00:49:19,395 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:49:19,514 INFO L321 Elim1Store]: treesize reduction 152, result has 10.1 percent of original size [2023-02-16 00:49:19,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 27896 treesize of output 17126 [2023-02-16 00:49:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:49:24,593 INFO L321 Elim1Store]: treesize reduction 184, result has 35.4 percent of original size [2023-02-16 00:49:24,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 23748 treesize of output 17413 [2023-02-16 00:49:24,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:49:24,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27265 treesize of output 23275