./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.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_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/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_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/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_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/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 fa528625528e1eb8428ab738bffd6c9e4b89662e .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:30:35,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:35,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:35,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:35,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:35,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:35,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:35,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:35,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:35,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:35,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:35,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:35,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:35,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:35,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:35,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:35,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:35,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:35,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:35,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:35,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:35,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:35,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:35,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:35,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:35,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:35,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:35,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:35,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:35,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:35,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:35,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:35,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:35,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:35,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:35,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:35,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:35,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:35,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:35,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:35,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:35,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:30:35,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:35,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:35,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:35,704 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:35,704 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:35,705 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:35,705 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:30:35,705 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:35,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:35,706 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:30:35,706 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:30:35,707 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:35,707 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:30:35,707 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:30:35,708 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:30:35,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:35,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:30:35,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:30:35,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:30:35,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:35,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:30:35,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:35,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:30:35,711 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:30:35,712 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:30:35,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:30:35,712 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:35,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:30:35,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:35,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:35,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:35,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:35,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:35,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:30:35,715 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:30:35,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:30:35,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:30:35,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:35,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:35,717 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_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa528625528e1eb8428ab738bffd6c9e4b89662e [2021-10-11 02:30:35,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:36,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:36,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:36,006 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:36,007 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:36,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-regression/test24-2.c [2021-10-11 02:30:36,082 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/data/9e75819a9/1fcc59d6b662449182e3c85cc289e60e/FLAG2da23ff30 [2021-10-11 02:30:36,617 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:36,618 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/sv-benchmarks/c/ldv-regression/test24-2.c [2021-10-11 02:30:36,626 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/data/9e75819a9/1fcc59d6b662449182e3c85cc289e60e/FLAG2da23ff30 [2021-10-11 02:30:36,983 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/data/9e75819a9/1fcc59d6b662449182e3c85cc289e60e [2021-10-11 02:30:36,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:36,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:36,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:36,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:36,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:36,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748986e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36, skipping insertion in model container [2021-10-11 02:30:36,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:37,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:30:37,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:30:37,268 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_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-10-11 02:30:37,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:37,286 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:30:37,305 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_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-10-11 02:30:37,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:37,323 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:30:37,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37 WrapperNode [2021-10-11 02:30:37,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:37,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:37,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:30:37,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:30:37,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:37,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:30:37,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:30:37,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:30:37,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:30:37,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:30:37,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:30:37,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:30:37,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/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 02:30:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:30:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:30:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:30:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:30:37,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:30:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:30:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:30:38,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:30:38,015 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:30:38,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38 BoogieIcfgContainer [2021-10-11 02:30:38,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:30:38,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:30:38,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:30:38,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:30:38,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:36" (1/3) ... [2021-10-11 02:30:38,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5b5a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:38, skipping insertion in model container [2021-10-11 02:30:38,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (2/3) ... [2021-10-11 02:30:38,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5b5a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:38, skipping insertion in model container [2021-10-11 02:30:38,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38" (3/3) ... [2021-10-11 02:30:38,027 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2021-10-11 02:30:38,047 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:30:38,065 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:30:38,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:30:38,102 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:30:38,102 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:30:38,102 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:30:38,103 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:30:38,103 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:30:38,103 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:30:38,103 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:30:38,103 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:30:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 02:30:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:30:38,122 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:38,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:38,123 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:38,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1382612843, now seen corresponding path program 1 times [2021-10-11 02:30:38,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:38,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596805523] [2021-10-11 02:30:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:38,316 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 02:30:38,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596805523] [2021-10-11 02:30:38,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:38,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:30:38,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054569361] [2021-10-11 02:30:38,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:38,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:38,342 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2021-10-11 02:30:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:38,367 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2021-10-11 02:30:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:38,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-10-11 02:30:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:38,378 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:30:38,379 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:30:38,382 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 02:30:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:30:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:30:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:30:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 02:30:38,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-10-11 02:30:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:38,419 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 02:30:38,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 02:30:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:30:38,420 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:38,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:38,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:30:38,421 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:38,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1271987069, now seen corresponding path program 1 times [2021-10-11 02:30:38,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:38,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356497946] [2021-10-11 02:30:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:38,526 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 02:30:38,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356497946] [2021-10-11 02:30:38,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109019289] [2021-10-11 02:30:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/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 02:30:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:30:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:38,708 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 02:30:38,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:38,751 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 02:30:38,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458079480] [2021-10-11 02:30:38,775 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:30:38,775 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:38,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:38,787 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:38,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:40,016 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:40,410 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2021-10-11 02:30:40,554 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-10-11 02:30:41,228 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-10-11 02:30:41,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:41,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:41,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-11 02:30:41,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681352915] [2021-10-11 02:30:41,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:30:41,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:41,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:30:41,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:30:41,251 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 7 states. [2021-10-11 02:30:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:41,289 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-10-11 02:30:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:30:41,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-10-11 02:30:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:41,291 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:30:41,291 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:30:41,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:30:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:30:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-11 02:30:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:30:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-11 02:30:41,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-10-11 02:30:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:41,304 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-11 02:30:41,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:30:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-11 02:30:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:30:41,311 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:41,311 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:41,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:30:41,539 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:41,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:41,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1074936653, now seen corresponding path program 2 times [2021-10-11 02:30:41,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:41,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019386636] [2021-10-11 02:30:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:41,686 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 02:30:41,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019386636] [2021-10-11 02:30:41,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573860744] [2021-10-11 02:30:41,687 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_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/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 02:30:41,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:30:41,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:30:41,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:30:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:41,840 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 02:30:41,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:41,946 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 02:30:41,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607918386] [2021-10-11 02:30:41,951 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:30:41,951 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:41,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:41,952 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:41,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:42,576 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:42,868 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2021-10-11 02:30:43,006 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-10-11 02:30:43,580 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-10-11 02:30:43,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:43,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:43,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-10-11 02:30:43,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702478900] [2021-10-11 02:30:43,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:30:43,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:30:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:30:43,583 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 13 states. [2021-10-11 02:30:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:43,621 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-10-11 02:30:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:30:43,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-10-11 02:30:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:43,622 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:30:43,623 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:30:43,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:30:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:30:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:30:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:30:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-10-11 02:30:43,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2021-10-11 02:30:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:43,628 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-11 02:30:43,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:30:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-10-11 02:30:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:30:43,630 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:43,630 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:43,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-11 02:30:43,839 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:43,839 INFO L82 PathProgramCache]: Analyzing trace with hash 408505677, now seen corresponding path program 3 times [2021-10-11 02:30:43,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:43,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259051142] [2021-10-11 02:30:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:44,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259051142] [2021-10-11 02:30:44,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778654179] [2021-10-11 02:30:44,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:30:44,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:30:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:30:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:30:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:44,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:44,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109401412] [2021-10-11 02:30:44,494 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:30:44,494 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:44,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:44,495 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:44,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:45,065 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:45,370 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-10-11 02:30:45,495 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-10-11 02:30:46,206 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-10-11 02:30:46,208 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:46,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:46,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-10-11 02:30:46,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445165760] [2021-10-11 02:30:46,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-10-11 02:30:46,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:46,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-11 02:30:46,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:30:46,211 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 23 states. [2021-10-11 02:30:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:46,278 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-10-11 02:30:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-11 02:30:46,278 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2021-10-11 02:30:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:46,281 INFO L225 Difference]: With dead ends: 36 [2021-10-11 02:30:46,286 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:30:46,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:30:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:30:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 02:30:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:30:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-11 02:30:46,298 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2021-10-11 02:30:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:46,299 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-11 02:30:46,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-10-11 02:30:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-11 02:30:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 02:30:46,301 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:46,301 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:46,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-11 02:30:46,527 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash 146565965, now seen corresponding path program 4 times [2021-10-11 02:30:46,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:46,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567070110] [2021-10-11 02:30:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:46,743 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:46,966 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:47,001 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:30:47,002 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:30:47,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-10-11 02:30:47,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:30:47 BoogieIcfgContainer [2021-10-11 02:30:47,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:30:47,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:30:47,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:30:47,055 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:30:47,055 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38" (3/4) ... [2021-10-11 02:30:47,058 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:30:47,139 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2facab7a-5fa8-49fc-b432-0e4dd7ed5d5e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:30:47,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:30:47,140 INFO L168 Benchmark]: Toolchain (without parser) took 10152.28 ms. Allocated memory was 113.2 MB in the beginning and 213.9 MB in the end (delta: 100.7 MB). Free memory was 85.6 MB in the beginning and 78.1 MB in the end (delta: 7.5 MB). Peak memory consumption was 108.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:47,140 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:47,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.70 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 85.3 MB in the beginning and 121.4 MB in the end (delta: -36.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:47,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.19 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 119.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:47,142 INFO L168 Benchmark]: Boogie Preprocessor took 35.06 ms. Allocated memory is still 146.8 MB. Free memory was 119.8 MB in the beginning and 118.9 MB in the end (delta: 888.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:47,142 INFO L168 Benchmark]: RCFGBuilder took 616.85 ms. Allocated memory is still 146.8 MB. Free memory was 118.9 MB in the beginning and 100.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:47,143 INFO L168 Benchmark]: TraceAbstraction took 9034.69 ms. Allocated memory was 146.8 MB in the beginning and 213.9 MB in the end (delta: 67.1 MB). Free memory was 100.4 MB in the beginning and 82.3 MB in the end (delta: 18.2 MB). Peak memory consumption was 86.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:47,143 INFO L168 Benchmark]: Witness Printer took 84.67 ms. Allocated memory is still 213.9 MB. Free memory was 82.3 MB in the beginning and 78.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:47,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 334.70 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 85.3 MB in the beginning and 121.4 MB in the end (delta: -36.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.19 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 119.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.06 ms. Allocated memory is still 146.8 MB. Free memory was 119.8 MB in the beginning and 118.9 MB in the end (delta: 888.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 616.85 ms. Allocated memory is still 146.8 MB. Free memory was 118.9 MB in the beginning and 100.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9034.69 ms. Allocated memory was 146.8 MB in the beginning and 213.9 MB in the end (delta: 67.1 MB). Free memory was 100.4 MB in the beginning and 82.3 MB in the end (delta: 18.2 MB). Peak memory consumption was 86.7 MB. Max. memory is 16.1 GB. * Witness Printer took 84.67 ms. Allocated memory is still 213.9 MB. Free memory was 82.3 MB in the beginning and 78.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] COND TRUE !check(ad1, i) [L39] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.9s, OverallIterations: 5, TraceHistogramMax: 20, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 0 SDslu, 60 SDs, 0 SdLazy, 49 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 3018 SizeOfPredicates, 0 NumberOfNonLiveVariables, 363 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 0/198 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...