./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer --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 0.2.0-a4ecdab [2020-11-28 02:59:44,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:59:44,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:59:44,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:59:44,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:59:44,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:59:44,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:59:44,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:59:44,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:59:44,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:59:44,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:59:44,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:59:44,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:59:44,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:59:44,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:59:44,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:59:44,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:59:44,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:59:44,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:59:44,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:59:44,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:59:44,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:59:44,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:59:44,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:59:44,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:59:44,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:59:44,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:59:44,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:59:44,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:59:44,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:59:44,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:59:44,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:59:44,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:59:44,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:59:44,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:59:44,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:59:44,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:59:44,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:59:44,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:59:44,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:59:44,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:59:44,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:59:44,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:59:44,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:59:44,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:59:44,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:59:44,921 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:59:44,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:59:44,922 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:59:44,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:59:44,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:59:44,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:59:44,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:59:44,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:59:44,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:59:44,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:59:44,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:59:44,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:59:44,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:59:44,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:59:44,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:59:44,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:59:44,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:59:44,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:59:44,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:59:44,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:59:44,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:59:44,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:59:44,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:59:44,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:59:44,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:59:44,928 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:/tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7862960b0aa057ac19174563f251d134d1269c2b [2020-11-28 02:59:45,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:59:45,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:59:45,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:59:45,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:59:45,278 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:59:45,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-11-28 02:59:45,367 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/data/92e030d2d/a47141b9a4fd4cdd83fedd1404ef6d99/FLAG79513b419 [2020-11-28 02:59:45,866 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:59:45,867 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-11-28 02:59:45,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/data/92e030d2d/a47141b9a4fd4cdd83fedd1404ef6d99/FLAG79513b419 [2020-11-28 02:59:46,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/data/92e030d2d/a47141b9a4fd4cdd83fedd1404ef6d99 [2020-11-28 02:59:46,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:59:46,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:59:46,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:59:46,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:59:46,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:59:46,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1494f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46, skipping insertion in model container [2020-11-28 02:59:46,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:59:46,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:59:46,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:59:46,454 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:59:46,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:59:46,523 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:59:46,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46 WrapperNode [2020-11-28 02:59:46,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:59:46,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:59:46,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:59:46,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:59:46,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:59:46,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:59:46,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:59:46,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:59:46,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... [2020-11-28 02:59:46,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:59:46,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:59:46,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:59:46,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:59:46,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:59:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:59:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-28 02:59:46,656 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-11-28 02:59:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:59:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 02:59:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:59:46,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:59:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:59:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:59:47,070 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:59:47,071 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-28 02:59:47,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:47 BoogieIcfgContainer [2020-11-28 02:59:47,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:59:47,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:59:47,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:59:47,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:59:47,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:59:46" (1/3) ... [2020-11-28 02:59:47,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c60452b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:47, skipping insertion in model container [2020-11-28 02:59:47,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:46" (2/3) ... [2020-11-28 02:59:47,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c60452b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:47, skipping insertion in model container [2020-11-28 02:59:47,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:47" (3/3) ... [2020-11-28 02:59:47,089 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-11-28 02:59:47,099 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:59:47,104 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 02:59:47,119 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 02:59:47,150 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:59:47,150 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:59:47,150 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:59:47,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:59:47,151 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:59:47,151 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:59:47,151 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:59:47,151 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:59:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-28 02:59:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 02:59:47,176 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:47,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:47,178 INFO L429 AbstractCegarLoop]: === Iteration 1 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1224318051, now seen corresponding path program 1 times [2020-11-28 02:59:47,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:47,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904485667] [2020-11-28 02:59:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:47,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904485667] [2020-11-28 02:59:47,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:47,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:59:47,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028786498] [2020-11-28 02:59:47,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:59:47,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:47,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:59:47,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:59:47,387 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-11-28 02:59:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:47,413 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-11-28 02:59:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:59:47,415 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-28 02:59:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:47,424 INFO L225 Difference]: With dead ends: 53 [2020-11-28 02:59:47,425 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 02:59:47,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:59:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 02:59:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-28 02:59:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 02:59:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-28 02:59:47,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2020-11-28 02:59:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:47,471 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-28 02:59:47,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:59:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-28 02:59:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 02:59:47,472 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:47,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:47,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:59:47,473 INFO L429 AbstractCegarLoop]: === Iteration 2 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:47,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2033664677, now seen corresponding path program 1 times [2020-11-28 02:59:47,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:47,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696594786] [2020-11-28 02:59:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:47,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696594786] [2020-11-28 02:59:47,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:47,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:59:47,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417542993] [2020-11-28 02:59:47,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:59:47,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:47,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:59:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:47,672 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-11-28 02:59:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:47,972 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-11-28 02:59:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:59:47,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 02:59:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:47,979 INFO L225 Difference]: With dead ends: 54 [2020-11-28 02:59:47,980 INFO L226 Difference]: Without dead ends: 52 [2020-11-28 02:59:47,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:59:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-28 02:59:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-11-28 02:59:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 02:59:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-11-28 02:59:48,006 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 10 [2020-11-28 02:59:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:48,007 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-11-28 02:59:48,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:59:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-11-28 02:59:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 02:59:48,009 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:48,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:48,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:59:48,012 INFO L429 AbstractCegarLoop]: === Iteration 3 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash 958141500, now seen corresponding path program 1 times [2020-11-28 02:59:48,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:48,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548024889] [2020-11-28 02:59:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548024889] [2020-11-28 02:59:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439564064] [2020-11-28 02:59:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 02:59:48,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:48,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:59:48,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:59:48,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:59:48,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:59:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:48,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:48,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-28 02:59:48,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096239722] [2020-11-28 02:59:48,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 02:59:48,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:48,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:59:48,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:59:48,497 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2020-11-28 02:59:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:48,849 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-11-28 02:59:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 02:59:48,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-11-28 02:59:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:48,852 INFO L225 Difference]: With dead ends: 52 [2020-11-28 02:59:48,852 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 02:59:48,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-11-28 02:59:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 02:59:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 21. [2020-11-28 02:59:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 02:59:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-28 02:59:48,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-11-28 02:59:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:48,864 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-28 02:59:48,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 02:59:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-28 02:59:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 02:59:48,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:48,867 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:49,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 02:59:49,095 INFO L429 AbstractCegarLoop]: === Iteration 4 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:49,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1234363027, now seen corresponding path program 1 times [2020-11-28 02:59:49,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:49,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193109413] [2020-11-28 02:59:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:49,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-28 02:59:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:49,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193109413] [2020-11-28 02:59:49,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47260958] [2020-11-28 02:59:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:49,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 02:59:49,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:49,365 INFO L384 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 [2020-11-28 02:59:49,366 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:59:49,378 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:59:49,379 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 02:59:49,379 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-11-28 02:59:51,405 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1) ((as const (Array Int Int)) 0))) is different from true [2020-11-28 02:59:51,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:59:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-11-28 02:59:51,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:51,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-11-28 02:59:51,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567818195] [2020-11-28 02:59:51,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:59:51,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:59:51,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2020-11-28 02:59:51,655 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2020-11-28 02:59:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:51,817 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-11-28 02:59:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:59:51,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-11-28 02:59:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:51,819 INFO L225 Difference]: With dead ends: 23 [2020-11-28 02:59:51,819 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 02:59:51,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=38, Invalid=97, Unknown=1, NotChecked=20, Total=156 [2020-11-28 02:59:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 02:59:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 02:59:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 02:59:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 02:59:51,821 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-11-28 02:59:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:51,821 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:59:51,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:59:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 02:59:51,822 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 02:59:52,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:52,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 02:59:52,244 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-28 02:59:52,282 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 02:59:52,282 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 02:59:52,282 INFO L274 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-11-28 02:59:52,282 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 02:59:52,282 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 02:59:52,282 INFO L277 CegarLoopResult]: At program point L49(lines 41 50) the Hoare annotation is: true [2020-11-28 02:59:52,283 INFO L270 CegarLoopResult]: 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_#t~malloc17.base|)) (= (select |#memory_int| ULTIMATE.start_main_~a~0.base) .cse0))) [2020-11-28 02:59:52,283 INFO L274 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-11-28 02:59:52,283 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-11-28 02:59:52,283 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-11-28 02:59:52,283 INFO L277 CegarLoopResult]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2020-11-28 02:59:52,283 INFO L274 CegarLoopResult]: For program point L25(lines 25 26) no Hoare annotation was computed. [2020-11-28 02:59:52,283 INFO L274 CegarLoopResult]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-28 02:59:52,284 INFO L270 CegarLoopResult]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse2 (= |check_#in~x| 0)) (.cse3 ((as const (Array Int Int)) 0))) (or (and (let ((.cse0 (<= 1 check___VERIFIER_assert_~cond)) (.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse0 .cse1 (<= 1 check_~x)) (and .cse0 .cse2 .cse1 (= check_~x 0)))) (= (select |#memory_int| check_~a.base) .cse3)) (let ((.cse4 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse4 (not .cse2)) (or .cse4 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse3)))) [2020-11-28 02:59:52,284 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-28 02:59:52,284 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-28 02:59:52,284 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-11-28 02:59:52,284 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-11-28 02:59:52,284 INFO L274 CegarLoopResult]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2020-11-28 02:59:52,285 INFO L274 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-11-28 02:59:52,285 INFO L274 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-11-28 02:59:52,285 INFO L274 CegarLoopResult]: For program point L5-2(line 5) no Hoare annotation was computed. [2020-11-28 02:59:52,285 INFO L274 CegarLoopResult]: For program point L5-3(line 5) no Hoare annotation was computed. [2020-11-28 02:59:52,285 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-11-28 02:59:52,285 INFO L274 CegarLoopResult]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-28 02:59:52,285 INFO L274 CegarLoopResult]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2020-11-28 02:59:52,285 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-28 02:59:52,286 INFO L274 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-11-28 02:59:52,286 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-11-28 02:59:52,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:59:52 BoogieIcfgContainer [2020-11-28 02:59:52,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:59:52,297 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:59:52,297 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:59:52,301 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:59:52,302 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:47" (3/4) ... [2020-11-28 02:59:52,310 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 02:59:52,317 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-11-28 02:59:52,324 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-28 02:59:52,325 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 02:59:52,325 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 02:59:52,325 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 02:59:52,384 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_805e40c0-1c40-4d16-a236-5057ed59affa/bin/uautomizer/witness.graphml [2020-11-28 02:59:52,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:59:52,385 INFO L168 Benchmark]: Toolchain (without parser) took 6173.71 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 95.0 MB in the beginning and 87.9 MB in the end (delta: 7.1 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:52,386 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory is still 47.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:59:52,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.03 ms. Allocated memory is still 123.7 MB. Free memory was 95.0 MB in the beginning and 100.2 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:52,387 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.99 ms. Allocated memory is still 123.7 MB. Free memory was 100.2 MB in the beginning and 98.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:52,388 INFO L168 Benchmark]: Boogie Preprocessor took 23.16 ms. Allocated memory is still 123.7 MB. Free memory was 98.7 MB in the beginning and 97.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:52,388 INFO L168 Benchmark]: RCFGBuilder took 485.48 ms. Allocated memory is still 123.7 MB. Free memory was 97.1 MB in the beginning and 80.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:52,389 INFO L168 Benchmark]: TraceAbstraction took 5219.64 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 80.3 MB in the beginning and 91.1 MB in the end (delta: -10.7 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:52,390 INFO L168 Benchmark]: Witness Printer took 87.74 ms. Allocated memory is still 148.9 MB. Free memory was 91.1 MB in the beginning and 87.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:52,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory is still 47.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 311.03 ms. Allocated memory is still 123.7 MB. Free memory was 95.0 MB in the beginning and 100.2 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.99 ms. Allocated memory is still 123.7 MB. Free memory was 100.2 MB in the beginning and 98.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.16 ms. Allocated memory is still 123.7 MB. Free memory was 98.7 MB in the beginning and 97.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 485.48 ms. Allocated memory is still 123.7 MB. Free memory was 97.1 MB in the beginning and 80.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5219.64 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 80.3 MB in the beginning and 91.1 MB in the end (delta: -10.7 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * Witness Printer took 87.74 ms. Allocated memory is still 148.9 MB. Free memory was 91.1 MB in the beginning and 87.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 111 SDtfs, 204 SDslu, 178 SDs, 0 SdLazy, 160 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=2, 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, 4 MinimizatonAttempts, 44 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 81 HoareAnnotationTreeSize, 10 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 107 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 4 QuantifiedInterpolants, 6358 SizeOfPredicates, 23 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...