./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 ff03de63 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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:21:11,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:21:11,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:21:11,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:21:11,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:21:11,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:21:11,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:21:11,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:21:11,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:21:11,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:21:11,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:21:11,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:21:11,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:21:11,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:21:11,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:21:11,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:21:11,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:21:11,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:21:11,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:21:11,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:21:11,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:21:11,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:21:11,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:21:11,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:21:11,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:21:11,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:21:11,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:21:11,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:21:11,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:21:11,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:21:11,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:21:11,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:21:11,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:21:11,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:21:11,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:21:11,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:21:11,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:21:11,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:21:11,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:21:11,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:21:11,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:21:11,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:21:11,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:21:11,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:21:11,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:21:11,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:21:11,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:21:11,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:21:11,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:21:11,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:21:11,924 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:21:11,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:21:11,924 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:21:11,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:21:11,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:21:11,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:21:11,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:21:11,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:21:11,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:21:11,926 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:21:11,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:21:11,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:21:11,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:21:11,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:21:11,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:21:11,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:21:11,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:21:11,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:21:11,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:21:11,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:21:11,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:21:11,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:21:11,929 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:21:11,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:21:11,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:21:11,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:21:11,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2021-12-21 13:21:12,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:21:12,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:21:12,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:21:12,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:21:12,214 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:21:12,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-12-21 13:21:12,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24abb747/1e4d1a6ac75a41c48c548e4182c9959a/FLAG2b1e1e33e [2021-12-21 13:21:12,640 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:21:12,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-12-21 13:21:12,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24abb747/1e4d1a6ac75a41c48c548e4182c9959a/FLAG2b1e1e33e [2021-12-21 13:21:13,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24abb747/1e4d1a6ac75a41c48c548e4182c9959a [2021-12-21 13:21:13,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:21:13,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:21:13,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:21:13,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:21:13,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:21:13,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bdc3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13, skipping insertion in model container [2021-12-21 13:21:13,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:21:13,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:21:13,210 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-12-21 13:21:13,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:21:13,240 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:21:13,253 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-12-21 13:21:13,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:21:13,285 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:21:13,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13 WrapperNode [2021-12-21 13:21:13,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:21:13,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:21:13,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:21:13,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:21:13,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,328 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2021-12-21 13:21:13,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:21:13,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:21:13,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:21:13,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:21:13,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:21:13,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:21:13,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:21:13,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:21:13,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (1/1) ... [2021-12-21 13:21:13,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:21:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:13,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 13:21:13,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 13:21:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:21:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 13:21:13,451 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 13:21:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:21:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-12-21 13:21:13,451 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-12-21 13:21:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 13:21:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:21:13,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:21:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 13:21:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 13:21:13,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 13:21:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 13:21:13,534 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:21:13,536 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:21:13,709 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:21:13,716 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:21:13,716 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:21:13,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:13 BoogieIcfgContainer [2021-12-21 13:21:13,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:21:13,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:21:13,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:21:13,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:21:13,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:21:13" (1/3) ... [2021-12-21 13:21:13,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e212123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:21:13, skipping insertion in model container [2021-12-21 13:21:13,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:13" (2/3) ... [2021-12-21 13:21:13,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e212123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:21:13, skipping insertion in model container [2021-12-21 13:21:13,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:13" (3/3) ... [2021-12-21 13:21:13,748 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-12-21 13:21:13,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:21:13,754 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:21:13,788 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:21:13,793 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 13:21:13,793 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:21:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 13:21:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 13:21:13,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:13,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:13,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash 753288437, now seen corresponding path program 1 times [2021-12-21 13:21:13,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:13,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074097975] [2021-12-21 13:21:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:13,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:14,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074097975] [2021-12-21 13:21:14,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074097975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:14,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:14,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:21:14,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407165840] [2021-12-21 13:21:14,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:14,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:21:14,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:21:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:14,118 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:21:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:14,241 INFO L93 Difference]: Finished difference Result 88 states and 121 transitions. [2021-12-21 13:21:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:21:14,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-21 13:21:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:14,250 INFO L225 Difference]: With dead ends: 88 [2021-12-21 13:21:14,250 INFO L226 Difference]: Without dead ends: 54 [2021-12-21 13:21:14,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:21:14,257 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:14,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 175 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-21 13:21:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2021-12-21 13:21:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 13:21:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-21 13:21:14,304 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 16 [2021-12-21 13:21:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:14,305 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-21 13:21:14,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:21:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-21 13:21:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 13:21:14,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:14,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:14,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:21:14,307 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash 270815563, now seen corresponding path program 1 times [2021-12-21 13:21:14,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:14,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666281074] [2021-12-21 13:21:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:14,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:14,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:14,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 13:21:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:14,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:14,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666281074] [2021-12-21 13:21:14,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666281074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876831197] [2021-12-21 13:21:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:14,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:14,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:14,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:14,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:21:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:14,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 13:21:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:14,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:14,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876831197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:14,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:14,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-12-21 13:21:14,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997677209] [2021-12-21 13:21:14,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:14,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:21:14,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:21:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-21 13:21:14,741 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:14,900 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-12-21 13:21:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:21:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-21 13:21:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:14,910 INFO L225 Difference]: With dead ends: 60 [2021-12-21 13:21:14,911 INFO L226 Difference]: Without dead ends: 58 [2021-12-21 13:21:14,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:14,914 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 36 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:14,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 180 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-21 13:21:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-12-21 13:21:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 13:21:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-21 13:21:14,928 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2021-12-21 13:21:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:14,928 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-21 13:21:14,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-21 13:21:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 13:21:14,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:14,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:14,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 13:21:15,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:15,140 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1695917213, now seen corresponding path program 1 times [2021-12-21 13:21:15,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:15,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493926145] [2021-12-21 13:21:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:15,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 13:21:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 13:21:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 13:21:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:21:15,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:15,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493926145] [2021-12-21 13:21:15,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493926145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:15,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724359466] [2021-12-21 13:21:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:15,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:15,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:15,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 13:21:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 13:21:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:15,477 INFO L387 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 [2021-12-21 13:21:17,514 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 [2021-12-21 13:21:19,552 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_2 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_2))) is different from true [2021-12-21 13:21:21,615 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3))) is different from true [2021-12-21 13:21:21,652 INFO L387 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 29 treesize of output 23 [2021-12-21 13:21:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-21 13:21:21,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:23,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724359466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:23,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 13:21:23,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-12-21 13:21:23,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778753671] [2021-12-21 13:21:23,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:23,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 13:21:23,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 13:21:23,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=179, Unknown=3, NotChecked=84, Total=306 [2021-12-21 13:21:23,850 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 13:21:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:23,976 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-12-21 13:21:23,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 13:21:23,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 35 [2021-12-21 13:21:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:23,978 INFO L225 Difference]: With dead ends: 39 [2021-12-21 13:21:23,978 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 13:21:23,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=64, Invalid=287, Unknown=3, NotChecked=108, Total=462 [2021-12-21 13:21:23,981 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:23,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 167 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2021-12-21 13:21:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 13:21:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 13:21:23,983 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) [2021-12-21 13:21:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 13:21:23,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2021-12-21 13:21:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:23,984 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 13:21:23,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 13:21:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 13:21:23,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 13:21:23,986 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 13:21:24,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:24,211 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,SelfDestructingSolverStorable2 [2021-12-21 13:21:24,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-21 13:21:24,458 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-21 13:21:24,458 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-21 13:21:24,458 INFO L858 garLoopResultBuilder]: For program point L-1-1(line -1) no Hoare annotation was computed. [2021-12-21 13:21:24,458 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-21 13:21:24,458 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-21 13:21:24,459 INFO L861 garLoopResultBuilder]: At program point L49(lines 41 50) the Hoare annotation is: true [2021-12-21 13:21:24,459 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc14#1.base|)))) [2021-12-21 13:21:24,459 INFO L858 garLoopResultBuilder]: For program point L46-1(line 46) no Hoare annotation was computed. [2021-12-21 13:21:24,459 INFO L861 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: true [2021-12-21 13:21:24,459 INFO L858 garLoopResultBuilder]: For program point L44-1(line 44) no Hoare annotation was computed. [2021-12-21 13:21:24,459 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-21 13:21:24,459 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-21 13:21:24,459 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-21 13:21:24,459 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-21 13:21:24,460 INFO L854 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (and (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (<= 0 check_~x) (= |check_#in~x| 0) .cse1))) (= .cse0 (select |#memory_int| check_~a.base))) (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)))) [2021-12-21 13:21:24,460 INFO L858 garLoopResultBuilder]: For program point L33-1(line 33) no Hoare annotation was computed. [2021-12-21 13:21:24,460 INFO L861 garLoopResultBuilder]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2021-12-21 13:21:24,460 INFO L858 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-12-21 13:21:24,460 INFO L858 garLoopResultBuilder]: For program point L25(lines 25 26) no Hoare annotation was computed. [2021-12-21 13:21:24,460 INFO L854 garLoopResultBuilder]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (and (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (= check_~x 0) (= |check_#in~x| 0) .cse1))) (= .cse0 (select |#memory_int| check_~a.base))) (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)))) [2021-12-21 13:21:24,460 INFO L854 garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (and (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and (<= 1 |check_#in~x|) .cse1 (<= 1 check_~x)) (and (= check_~x 0) (= |check_#in~x| 0) .cse1))) (= .cse0 (select |#memory_int| check_~a.base))) (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)))) [2021-12-21 13:21:24,460 INFO L858 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2021-12-21 13:21:24,460 INFO L858 garLoopResultBuilder]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2021-12-21 13:21:24,464 INFO L858 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-12-21 13:21:24,464 INFO L858 garLoopResultBuilder]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2021-12-21 13:21:24,464 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (and (= check_~ai~0 0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (<= 0 check_~x) (= |check_#in~x| 0) .cse1))) (= .cse0 (select |#memory_int| check_~a.base)) (= check_~ax~0 0)) (not (<= 0 |check_#in~x|)))) [2021-12-21 13:21:24,464 INFO L858 garLoopResultBuilder]: For program point L36-1(line 36) no Hoare annotation was computed. [2021-12-21 13:21:24,464 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 12) the Hoare annotation is: true [2021-12-21 13:21:24,465 INFO L858 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-12-21 13:21:24,467 INFO L858 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-12-21 13:21:24,467 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 12) no Hoare annotation was computed. [2021-12-21 13:21:24,467 INFO L858 garLoopResultBuilder]: For program point L11-3(lines 10 12) no Hoare annotation was computed. [2021-12-21 13:21:24,468 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-12-21 13:21:24,470 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-21 13:21:24,471 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 13:21:24,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 01:21:24 BoogieIcfgContainer [2021-12-21 13:21:24,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 13:21:24,478 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 13:21:24,478 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 13:21:24,478 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 13:21:24,478 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:13" (3/4) ... [2021-12-21 13:21:24,480 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-21 13:21:24,485 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-21 13:21:24,485 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-12-21 13:21:24,485 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-21 13:21:24,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-12-21 13:21:24,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-12-21 13:21:24,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-12-21 13:21:24,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-21 13:21:24,523 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 13:21:24,524 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 13:21:24,524 INFO L158 Benchmark]: Toolchain (without parser) took 11461.61ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 44.2MB in the beginning and 64.4MB in the end (delta: -20.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 13:21:24,524 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 77.6MB. Free memory was 52.1MB in the beginning and 52.0MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 13:21:24,525 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.94ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 44.1MB in the beginning and 71.5MB in the end (delta: -27.5MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-12-21 13:21:24,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.79ms. Allocated memory is still 94.4MB. Free memory was 71.4MB in the beginning and 69.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 13:21:24,525 INFO L158 Benchmark]: Boogie Preprocessor took 43.10ms. Allocated memory is still 94.4MB. Free memory was 69.8MB in the beginning and 68.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 13:21:24,526 INFO L158 Benchmark]: RCFGBuilder took 348.90ms. Allocated memory is still 94.4MB. Free memory was 68.8MB in the beginning and 58.0MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 13:21:24,526 INFO L158 Benchmark]: TraceAbstraction took 10743.53ms. Allocated memory is still 94.4MB. Free memory was 57.5MB in the beginning and 67.2MB in the end (delta: -9.7MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2021-12-21 13:21:24,526 INFO L158 Benchmark]: Witness Printer took 46.25ms. Allocated memory is still 94.4MB. Free memory was 67.2MB in the beginning and 64.4MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 13:21:24,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 77.6MB. Free memory was 52.1MB in the beginning and 52.0MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.94ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 44.1MB in the beginning and 71.5MB in the end (delta: -27.5MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.79ms. Allocated memory is still 94.4MB. Free memory was 71.4MB in the beginning and 69.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.10ms. Allocated memory is still 94.4MB. Free memory was 69.8MB in the beginning and 68.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 348.90ms. Allocated memory is still 94.4MB. Free memory was 68.8MB in the beginning and 58.0MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10743.53ms. Allocated memory is still 94.4MB. Free memory was 57.5MB in the beginning and 67.2MB in the end (delta: -9.7MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * Witness Printer took 46.25ms. Allocated memory is still 94.4MB. Free memory was 67.2MB in the beginning and 64.4MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 4 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.7s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 86 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 83 mSDsluCounter, 522 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 152 IncrementalHoareTripleChecker+Unchecked, 419 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 250 IncrementalHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 103 mSDtfsCounter, 250 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=1, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 30 PreInvPairs, 38 NumberOfFragments, 215 HoareAnnotationTreeSize, 30 FomulaSimplifications, 45 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 389 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 133 ConstructedInterpolants, 13 QuantifiedInterpolants, 570 SizeOfPredicates, 16 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 17/26 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 1 specifications checked. All of them hold - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-21 13:21:24,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE