./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test27-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2292364e3df3925555991c57490c078c89b959e0 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2021-10-11 02:30:01,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:01,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:01,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:01,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:01,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:01,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:01,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:01,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:01,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:01,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:01,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:01,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:01,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:01,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:01,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:01,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:01,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:01,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:01,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:01,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:01,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:01,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:01,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:01,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:01,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:01,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:01,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:01,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:01,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:01,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:01,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:01,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:01,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:01,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:01,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:01,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:01,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:01,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:01,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:01,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:01,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:30:01,667 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:01,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:01,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:01,670 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:01,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:01,670 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:01,670 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:30:01,671 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:01,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:01,671 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:30:01,673 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:30:01,673 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:01,673 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:30:01,674 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:30:01,674 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:30:01,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:01,675 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:30:01,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:30:01,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:30:01,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:01,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:30:01,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:01,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:30:01,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:30:01,677 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:30:01,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:30:01,677 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:01,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:30:01,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:01,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:01,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:01,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:01,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:01,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:30:01,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:30:01,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:30:01,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:30:01,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:01,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:01,683 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2292364e3df3925555991c57490c078c89b959e0 [2021-10-11 02:30:01,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:01,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:02,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:02,002 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:02,003 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:02,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-regression/test27-2.c [2021-10-11 02:30:02,096 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/data/b466b781c/ad932b1e9b2941a487387654617a1696/FLAGac0f9391f [2021-10-11 02:30:02,626 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:02,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/sv-benchmarks/c/ldv-regression/test27-2.c [2021-10-11 02:30:02,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/data/b466b781c/ad932b1e9b2941a487387654617a1696/FLAGac0f9391f [2021-10-11 02:30:02,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/data/b466b781c/ad932b1e9b2941a487387654617a1696 [2021-10-11 02:30:02,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:02,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:02,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:02,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:02,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:02,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:02" (1/1) ... [2021-10-11 02:30:02,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674f6d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:02, skipping insertion in model container [2021-10-11 02:30:02,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:02" (1/1) ... [2021-10-11 02:30:02,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:30:03,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:30:03,218 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-10-11 02:30:03,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:03,241 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:30:03,283 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-10-11 02:30:03,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:03,303 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:30:03,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03 WrapperNode [2021-10-11 02:30:03,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:03,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:03,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:30:03,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:30:03,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:03,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:30:03,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:30:03,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:30:03,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... [2021-10-11 02:30:03,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:30:03,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:30:03,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:30:03,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:30:03,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:30:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:30:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:30:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:30:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:30:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:30:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:30:03,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:30:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:30:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:30:03,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:30:03,977 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:30:03,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:03 BoogieIcfgContainer [2021-10-11 02:30:03,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:30:03,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:30:03,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:30:03,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:30:03,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:02" (1/3) ... [2021-10-11 02:30:03,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596fdff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:03, skipping insertion in model container [2021-10-11 02:30:03,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:03" (2/3) ... [2021-10-11 02:30:03,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596fdff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:03, skipping insertion in model container [2021-10-11 02:30:03,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:03" (3/3) ... [2021-10-11 02:30:03,989 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2021-10-11 02:30:04,005 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:30:04,009 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:30:04,049 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:30:04,115 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:30:04,115 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:30:04,115 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:30:04,116 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:30:04,116 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:30:04,116 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:30:04,116 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:30:04,117 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:30:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 02:30:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:30:04,141 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:04,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:04,142 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:04,149 INFO L82 PathProgramCache]: Analyzing trace with hash -747951412, now seen corresponding path program 1 times [2021-10-11 02:30:04,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:04,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802383813] [2021-10-11 02:30:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:04,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802383813] [2021-10-11 02:30:04,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:04,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:30:04,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124225617] [2021-10-11 02:30:04,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:04,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:04,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:04,395 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2021-10-11 02:30:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:04,447 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2021-10-11 02:30:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:04,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-10-11 02:30:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:04,467 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:30:04,468 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:30:04,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:30:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:30:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:30:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:30:04,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-10-11 02:30:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:04,506 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:30:04,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:30:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:30:04,507 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:04,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:04,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:30:04,508 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:04,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1048251717, now seen corresponding path program 1 times [2021-10-11 02:30:04,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:04,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528605634] [2021-10-11 02:30:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:04,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528605634] [2021-10-11 02:30:04,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166635299] [2021-10-11 02:30:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:30:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:04,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:30:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:04,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:04,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [113427713] [2021-10-11 02:30:04,957 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:30:04,957 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:04,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:04,969 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:04,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:06,265 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2021-10-11 02:30:07,624 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:07,853 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-10-11 02:30:08,069 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-10-11 02:30:08,196 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-10-11 02:30:08,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:08,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:08,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-11 02:30:08,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905657665] [2021-10-11 02:30:08,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:30:08,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:08,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:30:08,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:30:08,507 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2021-10-11 02:30:08,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:08,547 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-11 02:30:08,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:30:08,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2021-10-11 02:30:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:08,549 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:30:08,549 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:30:08,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:30:08,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:30:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-11 02:30:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:30:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-11 02:30:08,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-10-11 02:30:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:08,568 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-11 02:30:08,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:30:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-11 02:30:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:30:08,570 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:08,570 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:08,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:30:08,783 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:08,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1981767526, now seen corresponding path program 2 times [2021-10-11 02:30:08,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:08,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010284400] [2021-10-11 02:30:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:08,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010284400] [2021-10-11 02:30:08,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678388783] [2021-10-11 02:30:08,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:30:09,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:30:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:30:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:30:09,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:09,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:09,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567637907] [2021-10-11 02:30:09,287 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:30:09,287 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:09,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:09,287 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:09,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:11,385 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:11,648 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-10-11 02:30:11,856 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-10-11 02:30:12,300 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:12,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:12,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-10-11 02:30:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480751736] [2021-10-11 02:30:12,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:30:12,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:30:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:30:12,302 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 13 states. [2021-10-11 02:30:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:12,361 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2021-10-11 02:30:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:30:12,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2021-10-11 02:30:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:12,364 INFO L225 Difference]: With dead ends: 28 [2021-10-11 02:30:12,365 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:30:12,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:30:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:30:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:30:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:30:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-11 02:30:12,370 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2021-10-11 02:30:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:12,370 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-11 02:30:12,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:30:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-11 02:30:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:30:12,373 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:12,374 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:12,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:30:12,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1150168902, now seen corresponding path program 3 times [2021-10-11 02:30:12,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:12,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904532778] [2021-10-11 02:30:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:12,896 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:13,224 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:13,255 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:30:13,255 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:30:13,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-10-11 02:30:13,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:30:13 BoogieIcfgContainer [2021-10-11 02:30:13,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:30:13,303 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:30:13,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:30:13,303 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:30:13,304 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:03" (3/4) ... [2021-10-11 02:30:13,305 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:30:13,386 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f574ef-46c5-4bb7-bd44-ab2b85275da8/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:30:13,386 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:30:13,387 INFO L168 Benchmark]: Toolchain (without parser) took 10412.18 ms. Allocated memory was 109.1 MB in the beginning and 192.9 MB in the end (delta: 83.9 MB). Free memory was 79.7 MB in the beginning and 78.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 84.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:13,387 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 109.1 MB. Free memory is still 64.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:13,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.30 ms. Allocated memory is still 109.1 MB. Free memory was 79.4 MB in the beginning and 83.5 MB in the end (delta: -4.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:13,388 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.19 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 81.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:13,388 INFO L168 Benchmark]: Boogie Preprocessor took 30.00 ms. Allocated memory is still 109.1 MB. Free memory was 81.9 MB in the beginning and 80.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:13,389 INFO L168 Benchmark]: RCFGBuilder took 567.94 ms. Allocated memory is still 109.1 MB. Free memory was 80.4 MB in the beginning and 56.9 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:13,389 INFO L168 Benchmark]: TraceAbstraction took 9320.93 ms. Allocated memory was 109.1 MB in the beginning and 192.9 MB in the end (delta: 83.9 MB). Free memory was 56.4 MB in the beginning and 81.2 MB in the end (delta: -24.9 MB). Peak memory consumption was 60.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:13,390 INFO L168 Benchmark]: Witness Printer took 83.44 ms. Allocated memory is still 192.9 MB. Free memory was 81.2 MB in the beginning and 78.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:13,394 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 109.1 MB. Free memory is still 64.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.30 ms. Allocated memory is still 109.1 MB. Free memory was 79.4 MB in the beginning and 83.5 MB in the end (delta: -4.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.19 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 81.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.00 ms. Allocated memory is still 109.1 MB. Free memory was 81.9 MB in the beginning and 80.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 567.94 ms. Allocated memory is still 109.1 MB. Free memory was 80.4 MB in the beginning and 56.9 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9320.93 ms. Allocated memory was 109.1 MB in the beginning and 192.9 MB in the end (delta: 83.9 MB). Free memory was 56.4 MB in the beginning and 81.2 MB in the end (delta: -24.9 MB). Peak memory consumption was 60.5 MB. Max. memory is 16.1 GB. * Witness Printer took 83.44 ms. Allocated memory is still 192.9 MB. Free memory was 81.2 MB in the beginning and 78.1 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: - CounterExampleResult [Line: 55]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND FALSE !(j < 10) [L36] COND TRUE i >= 0 && i < 9 [L37] a[i] = i [L38] dummy.array = &a[i] [L39] dummies[i + 1] = &dummy [L40] cont.array = &dummies[0] [L41] EXPR cont.array [L41] EXPR cont.array[i] [L41] EXPR cont.array[i]->array [L41] pa = &cont.array[i]->array[i] [L42] EXPR a[i] [L42] COND TRUE a[i] > 0 [L43] EXPR dummies[i + 1] [L43] EXPR dummies[i + 1]->array [L43] EXPR dummies[i + 1]->array[i] [L43] i = dummies[i + 1]->array[i] - 10 [L44] EXPR \read(*pa) [L44] COND FALSE !(i < *pa) [L18] EXPR pc->array [L18] EXPR pc->array[i] [L18] EXPR pc->array[i]->array [L18] EXPR pc->array[i]->array[i] [L18] return pc->array[i]->array[i] == i; [L47] COND TRUE !check(&cont, i) [L55] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 4, TraceHistogramMax: 10, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 0 SDslu, 45 SDs, 0 SdLazy, 25 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 73 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 1206 SizeOfPredicates, 0 NumberOfNonLiveVariables, 254 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 incorrect! Received shutdown request...