./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/verifythis/elimination_max_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7862960b0aa057ac19174563f251d134d1269c2b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 09:02:27,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 09:02:27,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 09:02:27,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 09:02:27,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 09:02:27,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 09:02:27,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 09:02:27,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 09:02:27,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 09:02:27,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 09:02:27,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 09:02:27,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 09:02:27,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 09:02:27,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 09:02:27,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 09:02:27,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 09:02:27,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 09:02:27,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 09:02:27,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 09:02:27,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 09:02:27,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 09:02:27,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 09:02:27,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 09:02:27,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 09:02:27,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 09:02:27,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 09:02:27,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 09:02:27,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 09:02:27,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 09:02:27,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 09:02:27,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 09:02:27,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 09:02:27,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 09:02:27,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 09:02:27,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 09:02:27,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 09:02:27,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 09:02:27,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 09:02:27,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 09:02:27,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 09:02:27,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 09:02:27,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 09:02:27,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 09:02:27,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 09:02:27,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 09:02:27,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 09:02:27,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 09:02:27,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 09:02:27,883 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 09:02:27,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 09:02:27,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 09:02:27,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 09:02:27,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 09:02:27,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 09:02:27,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 09:02:27,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 09:02:27,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 09:02:27,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 09:02:27,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 09:02:27,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 09:02:27,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 09:02:27,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 09:02:27,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 09:02:27,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 09:02:27,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:02:27,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 09:02:27,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 09:02:27,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 09:02:27,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 09:02:27,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 09:02:27,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 09:02:27,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 09:02:27,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7862960b0aa057ac19174563f251d134d1269c2b [2021-08-26 09:02:28,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 09:02:28,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 09:02:28,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 09:02:28,218 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 09:02:28,218 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 09:02:28,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-08-26 09:02:28,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555b4801a/0c172a285230482c8e42225521417f8e/FLAG35bb6c49d [2021-08-26 09:02:28,834 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 09:02:28,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-08-26 09:02:28,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555b4801a/0c172a285230482c8e42225521417f8e/FLAG35bb6c49d [2021-08-26 09:02:29,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555b4801a/0c172a285230482c8e42225521417f8e [2021-08-26 09:02:29,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 09:02:29,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 09:02:29,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 09:02:29,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 09:02:29,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 09:02:29,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b006973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29, skipping insertion in model container [2021-08-26 09:02:29,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 09:02:29,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 09:02:29,441 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-08-26 09:02:29,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:02:29,465 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 09:02:29,476 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-08-26 09:02:29,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:02:29,545 INFO L208 MainTranslator]: Completed translation [2021-08-26 09:02:29,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29 WrapperNode [2021-08-26 09:02:29,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 09:02:29,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 09:02:29,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 09:02:29,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 09:02:29,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 09:02:29,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 09:02:29,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 09:02:29,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 09:02:29,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 09:02:29,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 09:02:29,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 09:02:29,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 09:02:29,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (1/1) ... [2021-08-26 09:02:29,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:02:29,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:29,674 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) [2021-08-26 09:02:29,704 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 [2021-08-26 09:02:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 09:02:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-08-26 09:02:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-08-26 09:02:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 09:02:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 09:02:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 09:02:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 09:02:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 09:02:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 09:02:30,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 09:02:30,105 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-08-26 09:02:30,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:30 BoogieIcfgContainer [2021-08-26 09:02:30,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 09:02:30,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 09:02:30,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 09:02:30,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 09:02:30,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:02:29" (1/3) ... [2021-08-26 09:02:30,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2185be5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:02:30, skipping insertion in model container [2021-08-26 09:02:30,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:29" (2/3) ... [2021-08-26 09:02:30,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2185be5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:02:30, skipping insertion in model container [2021-08-26 09:02:30,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:30" (3/3) ... [2021-08-26 09:02:30,117 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-08-26 09:02:30,122 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 09:02:30,122 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 09:02:30,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 09:02:30,188 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 09:02:30,189 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 09:02:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-26 09:02:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 09:02:30,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:30,213 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:30,214 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:02:30,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:30,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1228012135, now seen corresponding path program 1 times [2021-08-26 09:02:30,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:30,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195913098] [2021-08-26 09:02:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:30,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:02:30,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:30,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195913098] [2021-08-26 09:02:30,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195913098] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:30,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:02:30,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 09:02:30,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923044451] [2021-08-26 09:02:30,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 09:02:30,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:30,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 09:02:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 09:02:30,415 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-08-26 09:02:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:30,433 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-08-26 09:02:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 09:02:30,435 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), 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 10 [2021-08-26 09:02:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:30,442 INFO L225 Difference]: With dead ends: 51 [2021-08-26 09:02:30,443 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 09:02:30,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 09:02:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 09:02:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-26 09:02:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 09:02:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-26 09:02:30,483 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2021-08-26 09:02:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:30,484 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-26 09:02:30,485 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), 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) [2021-08-26 09:02:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-26 09:02:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 09:02:30,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:30,487 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:30,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 09:02:30,488 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:02:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2037358761, now seen corresponding path program 1 times [2021-08-26 09:02:30,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:30,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351083919] [2021-08-26 09:02:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:30,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:02:30,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:30,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351083919] [2021-08-26 09:02:30,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351083919] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:30,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:02:30,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 09:02:30,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477464257] [2021-08-26 09:02:30,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 09:02:30,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:30,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 09:02:30,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:02:30,628 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-08-26 09:02:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:30,857 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-08-26 09:02:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 09:02:30,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2021-08-26 09:02:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:30,863 INFO L225 Difference]: With dead ends: 54 [2021-08-26 09:02:30,864 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 09:02:30,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 09:02:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 09:02:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-08-26 09:02:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 09:02:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-08-26 09:02:30,899 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 10 [2021-08-26 09:02:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:30,900 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-08-26 09:02:30,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-08-26 09:02:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-08-26 09:02:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 09:02:30,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:30,903 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:30,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 09:02:30,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:02:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1470600778, now seen corresponding path program 1 times [2021-08-26 09:02:30,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:30,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098763271] [2021-08-26 09:02:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:30,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:02:31,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:31,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098763271] [2021-08-26 09:02:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098763271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:31,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472599821] [2021-08-26 09:02:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:31,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:31,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:31,145 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) [2021-08-26 09:02:31,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 09:02:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:31,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 09:02:31,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:02:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:02:31,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472599821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:31,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:02:31,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-26 09:02:31,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920516562] [2021-08-26 09:02:31,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 09:02:31,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:31,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 09:02:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-26 09:02:31,646 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 09:02:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:32,067 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-08-26 09:02:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 09:02:32,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 09:02:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:32,070 INFO L225 Difference]: With dead ends: 52 [2021-08-26 09:02:32,071 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 09:02:32,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-26 09:02:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 09:02:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 21. [2021-08-26 09:02:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 09:02:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-08-26 09:02:32,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-08-26 09:02:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:32,083 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-08-26 09:02:32,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 09:02:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-08-26 09:02:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 09:02:32,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:32,085 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:32,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 09:02:32,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:32,301 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr1ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:02:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1849931057, now seen corresponding path program 1 times [2021-08-26 09:02:32,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:32,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372238170] [2021-08-26 09:02:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:32,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:32,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-26 09:02:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:02:32,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:32,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372238170] [2021-08-26 09:02:32,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372238170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:32,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226601970] [2021-08-26 09:02:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:32,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:32,453 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) [2021-08-26 09:02:32,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 09:02:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:32,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 09:02:32,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:02:32,648 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 7 treesize of output 6 [2021-08-26 09:02:34,725 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1))) is different from true [2021-08-26 09:02:34,815 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 41 [2021-08-26 09:02:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-08-26 09:02:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226601970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:34,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:02:34,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-26 09:02:34,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056154305] [2021-08-26 09:02:34,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 09:02:34,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 09:02:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=56, Unknown=1, NotChecked=14, Total=90 [2021-08-26 09:02:34,908 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-26 09:02:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:35,013 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-08-26 09:02:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:02:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-08-26 09:02:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:35,015 INFO L225 Difference]: With dead ends: 23 [2021-08-26 09:02:35,015 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 09:02:35,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2116.7ms TimeCoverageRelationStatistics Valid=44, Invalid=115, Unknown=1, NotChecked=22, Total=182 [2021-08-26 09:02:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 09:02:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 09:02:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-08-26 09:02:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 09:02:35,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-08-26 09:02:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:35,018 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 09:02:35,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-26 09:02:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 09:02:35,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 09:02:35,020 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:35,021 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:35,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 09:02:35,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-26 09:02:35,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 09:02:35,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:02:35,388 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 09:02:35,388 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 09:02:35,388 INFO L857 garLoopResultBuilder]: For program point L-1-1(line -1) no Hoare annotation was computed. [2021-08-26 09:02:35,388 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 09:02:35,388 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 09:02:35,389 INFO L860 garLoopResultBuilder]: At program point L49(lines 41 50) the Hoare annotation is: true [2021-08-26 09:02:35,389 INFO L853 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| |ULTIMATE.start_main_#t~malloc17.base|) .cse0) (= .cse0 (select |#memory_int| ULTIMATE.start_main_~a~0.base)))) [2021-08-26 09:02:35,389 INFO L857 garLoopResultBuilder]: For program point L46-1(line 46) no Hoare annotation was computed. [2021-08-26 09:02:35,389 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-08-26 09:02:35,389 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-08-26 09:02:35,389 INFO L860 garLoopResultBuilder]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2021-08-26 09:02:35,390 INFO L857 garLoopResultBuilder]: For program point L25(lines 25 26) no Hoare annotation was computed. [2021-08-26 09:02:35,390 INFO L857 garLoopResultBuilder]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-08-26 09:02:35,390 INFO L853 garLoopResultBuilder]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0))) (or (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (and (let ((.cse2 (<= 1 check___VERIFIER_assert_~cond)) (.cse3 (<= (+ check_~y 1) check_~n))) (or (and (= check_~x 0) .cse1 .cse2 .cse3) (and .cse2 .cse3 (<= 1 check_~x)))) (= .cse0 (select |#memory_int| check_~a.base))) (let ((.cse4 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or (not .cse1) .cse4) (or (not (<= 1 |check_#in~x|)) .cse4))))) [2021-08-26 09:02:35,390 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-08-26 09:02:35,390 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-08-26 09:02:35,391 INFO L857 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-08-26 09:02:35,391 INFO L857 garLoopResultBuilder]: For program point L11-3(line 11) no Hoare annotation was computed. [2021-08-26 09:02:35,391 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-08-26 09:02:35,391 INFO L857 garLoopResultBuilder]: For program point L11-4(line 11) no Hoare annotation was computed. [2021-08-26 09:02:35,391 INFO L857 garLoopResultBuilder]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2021-08-26 09:02:35,391 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-08-26 09:02:35,392 INFO L857 garLoopResultBuilder]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-08-26 09:02:35,392 INFO L857 garLoopResultBuilder]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2021-08-26 09:02:35,392 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-08-26 09:02:35,392 INFO L857 garLoopResultBuilder]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2021-08-26 09:02:35,392 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-08-26 09:02:35,403 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 09:02:35,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 09:02:35 BoogieIcfgContainer [2021-08-26 09:02:35,411 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 09:02:35,412 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 09:02:35,412 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 09:02:35,412 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 09:02:35,413 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:30" (3/4) ... [2021-08-26 09:02:35,415 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 09:02:35,422 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-08-26 09:02:35,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-26 09:02:35,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-26 09:02:35,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-26 09:02:35,437 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 09:02:35,477 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 09:02:35,478 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 09:02:35,479 INFO L168 Benchmark]: Toolchain (without parser) took 6168.64 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 36.5 MB in the beginning and 66.7 MB in the end (delta: -30.2 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:35,480 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 40.0 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:02:35,480 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.47 ms. Allocated memory is still 58.7 MB. Free memory was 36.2 MB in the beginning and 41.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:35,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.31 ms. Allocated memory is still 58.7 MB. Free memory was 41.6 MB in the beginning and 39.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:02:35,481 INFO L168 Benchmark]: Boogie Preprocessor took 40.21 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 38.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:02:35,481 INFO L168 Benchmark]: RCFGBuilder took 464.58 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 38.7 MB in the beginning and 52.1 MB in the end (delta: -13.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:35,482 INFO L168 Benchmark]: TraceAbstraction took 5302.07 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 51.8 MB in the beginning and 29.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:35,482 INFO L168 Benchmark]: Witness Printer took 65.82 ms. Allocated memory is still 88.1 MB. Free memory was 29.4 MB in the beginning and 66.7 MB in the end (delta: -37.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:35,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 40.0 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 235.47 ms. Allocated memory is still 58.7 MB. Free memory was 36.2 MB in the beginning and 41.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.31 ms. Allocated memory is still 58.7 MB. Free memory was 41.6 MB in the beginning and 39.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.21 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 38.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 464.58 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 38.7 MB in the beginning and 52.1 MB in the end (delta: -13.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5302.07 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 51.8 MB in the beginning and 29.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. * Witness Printer took 65.82 ms. Allocated memory is still 88.1 MB. Free memory was 29.4 MB in the beginning and 66.7 MB in the end (delta: -37.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 27 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 5225.0ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 13.9ms, AutomataDifference: 820.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 165.3ms, InitialAbstractionConstructionTime: 14.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 111 SDtfs, 182 SDslu, 194 SDs, 0 SdLazy, 173 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 294.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2542.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=2, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 44 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 81 HoareAnnotationTreeSize, 10 FomulaSimplifications, 24 FormulaSimplificationTreeSizeReduction, 66.1ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 99 FormulaSimplificationTreeSizeReductionInter, 92.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 74.5ms SsaConstructionTime, 171.8ms SatisfiabilityAnalysisTime, 3160.5ms InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 4 QuantifiedInterpolants, 413 SizeOfPredicates, 21 NumberOfNonLiveVariables, 286 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 2/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 09:02:35,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...