./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sqm-iff.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_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm-iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/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 1a5bf013e0e121d7379402f0bf74321ad24fd8fa .......................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:57:12,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:57:12,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:57:12,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:57:12,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:57:12,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:57:12,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:57:12,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:57:12,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:57:12,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:57:12,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:57:12,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:57:12,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:57:12,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:57:12,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:57:12,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:57:12,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:57:12,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:57:12,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:57:12,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:57:12,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:57:12,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:57:12,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:57:12,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:57:12,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:57:12,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:57:12,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:57:12,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:57:12,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:57:12,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:57:12,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:57:12,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:57:12,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:57:12,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:57:12,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:57:12,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:57:12,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:57:12,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:57:12,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:57:12,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:57:12,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:57:12,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:57:12,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:57:12,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:57:12,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:57:12,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:57:12,922 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:57:12,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:57:12,922 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:57:12,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:57:12,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:57:12,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:57:12,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:57:12,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:57:12,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:57:12,925 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:57:12,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:57:12,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:57:12,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:57:12,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:57:12,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:57:12,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:57:12,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:57:12,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:57:12,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:57:12,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:57:12,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:57:12,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:57:12,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:57:12,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:57:12,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:57:12,928 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_97e8cacf-c14a-4a58-843c-3d19f1b51307/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a5bf013e0e121d7379402f0bf74321ad24fd8fa [2020-11-28 02:57:13,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:57:13,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:57:13,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:57:13,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:57:13,301 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:57:13,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/../../sv-benchmarks/c/array-fpi/sqm-iff.c [2020-11-28 02:57:13,382 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/data/c9affeace/c5b170bd634a4fffabe0c4943850fc1f/FLAG40b31e3e6 [2020-11-28 02:57:13,939 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:57:13,941 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/sv-benchmarks/c/array-fpi/sqm-iff.c [2020-11-28 02:57:13,954 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/data/c9affeace/c5b170bd634a4fffabe0c4943850fc1f/FLAG40b31e3e6 [2020-11-28 02:57:14,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/data/c9affeace/c5b170bd634a4fffabe0c4943850fc1f [2020-11-28 02:57:14,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:57:14,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:57:14,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:14,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:57:14,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:57:14,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b626d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14, skipping insertion in model container [2020-11-28 02:57:14,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:57:14,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:57:14,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:14,596 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:57:14,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:14,651 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:57:14,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14 WrapperNode [2020-11-28 02:57:14,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:14,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:57:14,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:57:14,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:57:14,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:57:14,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:57:14,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:57:14,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:57:14,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... [2020-11-28 02:57:14,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:57:14,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:57:14,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:57:14,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:57:14,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/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 02:57:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:57:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:57:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 02:57:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 02:57:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:57:14,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:57:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:57:15,210 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:57:15,210 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 02:57:15,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:15 BoogieIcfgContainer [2020-11-28 02:57:15,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:57:15,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:57:15,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:57:15,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:57:15,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:57:14" (1/3) ... [2020-11-28 02:57:15,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6dec8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:15, skipping insertion in model container [2020-11-28 02:57:15,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:14" (2/3) ... [2020-11-28 02:57:15,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6dec8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:15, skipping insertion in model container [2020-11-28 02:57:15,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:15" (3/3) ... [2020-11-28 02:57:15,220 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm-iff.c [2020-11-28 02:57:15,230 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:57:15,234 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:57:15,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:57:15,287 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:57:15,287 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:57:15,287 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:57:15,287 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:57:15,287 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:57:15,287 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:57:15,287 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:57:15,288 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:57:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-28 02:57:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:57:15,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:15,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:15,303 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:15,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:15,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-11-28 02:57:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:15,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080662056] [2020-11-28 02:57:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:15,499 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 02:57:15,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080662056] [2020-11-28 02:57:15,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:15,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:57:15,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450350206] [2020-11-28 02:57:15,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:57:15,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:15,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:57:15,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:57:15,525 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-28 02:57:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:15,541 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-11-28 02:57:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:57:15,542 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-28 02:57:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:15,553 INFO L225 Difference]: With dead ends: 43 [2020-11-28 02:57:15,553 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 02:57:15,557 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 02:57:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 02:57:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 02:57:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 02:57:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-11-28 02:57:15,598 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-11-28 02:57:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:15,599 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-11-28 02:57:15,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:57:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-11-28 02:57:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:57:15,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:15,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:15,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:57:15,601 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-11-28 02:57:15,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:15,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517462323] [2020-11-28 02:57:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:15,722 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 02:57:15,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517462323] [2020-11-28 02:57:15,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:15,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:57:15,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288758475] [2020-11-28 02:57:15,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:15,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:15,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:15,726 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-11-28 02:57:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:15,827 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-11-28 02:57:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:57:15,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 02:57:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:15,830 INFO L225 Difference]: With dead ends: 45 [2020-11-28 02:57:15,830 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 02:57:15,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 02:57:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-28 02:57:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 02:57:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-28 02:57:15,836 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-11-28 02:57:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:15,837 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-28 02:57:15,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-28 02:57:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:57:15,837 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:15,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:15,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:57:15,838 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:15,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-11-28 02:57:15,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:15,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066962339] [2020-11-28 02:57:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:15,875 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:57:15,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194028166] [2020-11-28 02:57:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/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 02:57:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:57:15,955 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:57:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:57:15,982 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:57:16,013 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:57:16,013 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:57:16,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 02:57:16,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:57:16 BoogieIcfgContainer [2020-11-28 02:57:16,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:57:16,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:57:16,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:57:16,250 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:57:16,250 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:15" (3/4) ... [2020-11-28 02:57:16,252 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:57:16,326 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_97e8cacf-c14a-4a58-843c-3d19f1b51307/bin/uautomizer/witness.graphml [2020-11-28 02:57:16,326 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:57:16,328 INFO L168 Benchmark]: Toolchain (without parser) took 2028.32 ms. Allocated memory is still 104.9 MB. Free memory was 71.2 MB in the beginning and 60.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:16,328 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 104.9 MB. Free memory was 76.6 MB in the beginning and 76.6 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:57:16,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.06 ms. Allocated memory is still 104.9 MB. Free memory was 71.0 MB in the beginning and 81.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:16,330 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.36 ms. Allocated memory is still 104.9 MB. Free memory was 81.5 MB in the beginning and 79.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:16,330 INFO L168 Benchmark]: Boogie Preprocessor took 45.08 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:57:16,331 INFO L168 Benchmark]: RCFGBuilder took 456.92 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 63.6 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:16,331 INFO L168 Benchmark]: TraceAbstraction took 1035.39 ms. Allocated memory is still 104.9 MB. Free memory was 63.1 MB in the beginning and 63.6 MB in the end (delta: -430.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:57:16,332 INFO L168 Benchmark]: Witness Printer took 76.73 ms. Allocated memory is still 104.9 MB. Free memory was 63.6 MB in the beginning and 60.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:16,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 104.9 MB. Free memory was 76.6 MB in the beginning and 76.6 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.06 ms. Allocated memory is still 104.9 MB. Free memory was 71.0 MB in the beginning and 81.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.36 ms. Allocated memory is still 104.9 MB. Free memory was 81.5 MB in the beginning and 79.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.08 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 456.92 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 63.6 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1035.39 ms. Allocated memory is still 104.9 MB. Free memory was 63.1 MB in the beginning and 63.6 MB in the end (delta: -430.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 76.73 ms. Allocated memory is still 104.9 MB. Free memory was 63.6 MB in the beginning and 60.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i