./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.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-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan --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 ee6f4ba937d52a63ff8049638c977b1c01237212 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-12-09 19:43:00,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:43:00,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:43:00,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:43:00,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:43:00,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:43:00,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:43:00,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:43:00,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:43:00,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:43:00,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:43:00,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:43:00,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:43:00,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:43:00,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:43:00,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:43:00,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:43:00,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:43:00,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:43:00,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:43:00,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:43:00,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:43:00,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:43:00,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:43:00,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:43:00,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:43:00,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:43:00,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:43:00,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:43:00,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:43:00,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:43:00,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:43:00,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:43:00,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:43:00,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:43:00,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:43:00,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:43:00,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:43:00,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:43:00,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:43:00,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:43:00,934 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:43:00,956 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:43:00,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:43:00,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:43:00,957 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:43:00,957 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:43:00,957 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:43:00,957 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:43:00,957 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:43:00,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:43:00,958 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:43:00,958 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:43:00,958 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:43:00,958 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:43:00,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:43:00,959 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:43:00,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:43:00,960 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:43:00,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:43:00,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:43:00,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:43:00,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:43:00,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:43:00,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:43:00,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:43:00,961 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:43:00,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:43:00,961 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:43:00,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:43:00,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:43:00,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:43:00,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:43:00,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:43:00,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:43:00,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:43:00,963 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:43:00,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:43:00,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:43:00,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:43:00,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:43:00,964 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-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee6f4ba937d52a63ff8049638c977b1c01237212 [2020-12-09 19:43:01,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:43:01,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:43:01,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:43:01,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:43:01,165 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:43:01,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2020-12-09 19:43:01,215 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/data/d4dd2b25a/c1961284ef964ff5a64ce07886d7dd0a/FLAGc86af4893 [2020-12-09 19:43:01,571 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:43:01,571 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2020-12-09 19:43:01,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/data/d4dd2b25a/c1961284ef964ff5a64ce07886d7dd0a/FLAGc86af4893 [2020-12-09 19:43:01,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/data/d4dd2b25a/c1961284ef964ff5a64ce07886d7dd0a [2020-12-09 19:43:01,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:43:01,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:43:01,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:43:01,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:43:01,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:43:01,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@411c69f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01, skipping insertion in model container [2020-12-09 19:43:01,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:43:01,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:43:01,718 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] [2020-12-09 19:43:01,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:43:01,747 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:43:01,756 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] [2020-12-09 19:43:01,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:43:01,779 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:43:01,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01 WrapperNode [2020-12-09 19:43:01,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:43:01,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:43:01,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:43:01,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:43:01,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:43:01,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:43:01,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:43:01,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:43:01,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... [2020-12-09 19:43:01,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:43:01,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:43:01,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:43:01,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:43:01,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:43:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:43:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:43:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:43:01,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:43:02,177 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:43:02,177 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-09 19:43:02,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:02 BoogieIcfgContainer [2020-12-09 19:43:02,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:43:02,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:43:02,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:43:02,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:43:02,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:43:01" (1/3) ... [2020-12-09 19:43:02,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14086655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:43:02, skipping insertion in model container [2020-12-09 19:43:02,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:01" (2/3) ... [2020-12-09 19:43:02,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14086655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:43:02, skipping insertion in model container [2020-12-09 19:43:02,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:02" (3/3) ... [2020-12-09 19:43:02,185 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound2.c [2020-12-09 19:43:02,195 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:43:02,197 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 19:43:02,204 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 19:43:02,221 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:43:02,221 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:43:02,221 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:43:02,221 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:43:02,221 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:43:02,221 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:43:02,221 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:43:02,222 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:43:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 19:43:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 19:43:02,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:43:02,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 19:43:02,238 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:43:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:43:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash 160510030, now seen corresponding path program 1 times [2020-12-09 19:43:02,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:43:02,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859642797] [2020-12-09 19:43:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:43:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:43:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:02,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859642797] [2020-12-09 19:43:02,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:43:02,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:43:02,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021534866] [2020-12-09 19:43:02,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 19:43:02,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:43:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 19:43:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:43:02,360 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-09 19:43:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:43:02,373 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-12-09 19:43:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 19:43:02,374 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 19:43:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:43:02,380 INFO L225 Difference]: With dead ends: 65 [2020-12-09 19:43:02,380 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 19:43:02,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:43:02,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 19:43:02,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 19:43:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 19:43:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-09 19:43:02,405 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2020-12-09 19:43:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:43:02,406 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-09 19:43:02,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 19:43:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-09 19:43:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 19:43:02,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:43:02,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 19:43:02,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:43:02,407 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:43:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:43:02,407 INFO L82 PathProgramCache]: Analyzing trace with hash 592212585, now seen corresponding path program 1 times [2020-12-09 19:43:02,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:43:02,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121854836] [2020-12-09 19:43:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:43:02,422 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:43:02,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556443688] [2020-12-09 19:43:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:43:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:43:02,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 19:43:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:43:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:02,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:43:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:02,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121854836] [2020-12-09 19:43:02,546 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:43:02,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556443688] [2020-12-09 19:43:02,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:43:02,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 19:43:02,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633579583] [2020-12-09 19:43:02,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:43:02,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:43:02,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:43:02,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:43:02,550 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-12-09 19:43:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:43:02,580 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-12-09 19:43:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:43:02,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-12-09 19:43:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:43:02,581 INFO L225 Difference]: With dead ends: 43 [2020-12-09 19:43:02,581 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 19:43:02,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:43:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 19:43:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-12-09 19:43:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 19:43:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-09 19:43:02,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2020-12-09 19:43:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:43:02,586 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-09 19:43:02,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:43:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-09 19:43:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 19:43:02,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:43:02,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:43:02,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 19:43:02,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:43:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:43:02,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1177973352, now seen corresponding path program 1 times [2020-12-09 19:43:02,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:43:02,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133135763] [2020-12-09 19:43:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:43:02,837 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:43:02,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259164461] [2020-12-09 19:43:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:43:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:43:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 19:43:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:43:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:02,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:43:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:03,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133135763] [2020-12-09 19:43:03,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:43:03,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259164461] [2020-12-09 19:43:03,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:43:03,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-09 19:43:03,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897010165] [2020-12-09 19:43:03,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:43:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:43:03,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:43:03,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:43:03,003 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-12-09 19:43:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:43:03,026 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-09 19:43:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:43:03,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 19:43:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:43:03,027 INFO L225 Difference]: With dead ends: 61 [2020-12-09 19:43:03,027 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 19:43:03,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:43:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 19:43:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-12-09 19:43:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 19:43:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-09 19:43:03,031 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2020-12-09 19:43:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:43:03,031 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-09 19:43:03,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:43:03,031 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-09 19:43:03,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 19:43:03,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:43:03,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:43:03,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:43:03,234 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:43:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:43:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1175714080, now seen corresponding path program 1 times [2020-12-09 19:43:03,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:43:03,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999569434] [2020-12-09 19:43:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:43:03,289 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:43:03,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844726102] [2020-12-09 19:43:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/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 [2020-12-09 19:43:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:43:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 19:43:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:43:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:03,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:43:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:03,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999569434] [2020-12-09 19:43:03,417 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:43:03,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844726102] [2020-12-09 19:43:03,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:43:03,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-12-09 19:43:03,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622108369] [2020-12-09 19:43:03,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:43:03,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:43:03,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:43:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:43:03,419 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-12-09 19:43:03,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:43:03,439 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-12-09 19:43:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:43:03,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 19:43:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:43:03,439 INFO L225 Difference]: With dead ends: 49 [2020-12-09 19:43:03,439 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 19:43:03,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:43:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 19:43:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-09 19:43:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 19:43:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-09 19:43:03,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2020-12-09 19:43:03,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:43:03,442 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-09 19:43:03,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:43:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-09 19:43:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 19:43:03,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:43:03,443 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:43:03,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:43:03,645 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:43:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:43:03,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2121654826, now seen corresponding path program 1 times [2020-12-09 19:43:03,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:43:03,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941202045] [2020-12-09 19:43:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:43:03,691 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:43:03,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102637019] [2020-12-09 19:43:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:43:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:43:03,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 19:43:03,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:43:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:03,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:43:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:43:03,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941202045] [2020-12-09 19:43:03,854 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:43:03,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102637019] [2020-12-09 19:43:03,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:43:03,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-12-09 19:43:03,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195921467] [2020-12-09 19:43:03,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:43:03,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:43:03,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:43:03,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:43:03,856 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2020-12-09 19:43:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:43:03,869 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-09 19:43:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:43:03,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 19:43:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:43:03,870 INFO L225 Difference]: With dead ends: 34 [2020-12-09 19:43:03,870 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 19:43:03,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:43:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 19:43:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 19:43:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 19:43:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 19:43:03,873 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2020-12-09 19:43:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:43:03,873 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 19:43:03,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:43:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 19:43:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 19:43:03,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:43:03,873 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:43:04,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:43:04,075 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:43:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:43:04,076 INFO L82 PathProgramCache]: Analyzing trace with hash 222893626, now seen corresponding path program 1 times [2020-12-09 19:43:04,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:43:04,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062992645] [2020-12-09 19:43:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:43:04,121 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:43:04,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603378583] [2020-12-09 19:43:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:43:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:43:04,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:43:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:43:04,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:43:04,190 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 19:43:04,190 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:43:04,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 19:43:04,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:43:04 BoogieIcfgContainer [2020-12-09 19:43:04,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:43:04,415 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:43:04,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:43:04,415 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:43:04,415 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:02" (3/4) ... [2020-12-09 19:43:04,416 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 19:43:04,448 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a9ada277-1268-4bb2-a3e6-8196836d86e4/bin/utaipan/witness.graphml [2020-12-09 19:43:04,448 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:43:04,449 INFO L168 Benchmark]: Toolchain (without parser) took 2857.86 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 55.8 MB in the beginning and 71.6 MB in the end (delta: -15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2020-12-09 19:43:04,450 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 86.0 MB. Free memory was 45.3 MB in the beginning and 45.3 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:43:04,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.72 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 55.8 MB in the beginning and 94.1 MB in the end (delta: -38.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:43:04,450 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.68 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 92.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:43:04,451 INFO L168 Benchmark]: Boogie Preprocessor took 17.16 ms. Allocated memory is still 117.4 MB. Free memory was 92.0 MB in the beginning and 91.3 MB in the end (delta: 717.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:43:04,451 INFO L168 Benchmark]: RCFGBuilder took 354.14 ms. Allocated memory is still 117.4 MB. Free memory was 91.3 MB in the beginning and 66.8 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:43:04,452 INFO L168 Benchmark]: TraceAbstraction took 2234.19 ms. Allocated memory is still 117.4 MB. Free memory was 66.1 MB in the beginning and 74.6 MB in the end (delta: -8.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:43:04,452 INFO L168 Benchmark]: Witness Printer took 33.43 ms. Allocated memory is still 117.4 MB. Free memory was 74.6 MB in the beginning and 71.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:43:04,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 86.0 MB. Free memory was 45.3 MB in the beginning and 45.3 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 187.72 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 55.8 MB in the beginning and 94.1 MB in the end (delta: -38.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.68 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 92.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.16 ms. Allocated memory is still 117.4 MB. Free memory was 92.0 MB in the beginning and 91.3 MB in the end (delta: 717.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 354.14 ms. Allocated memory is still 117.4 MB. Free memory was 91.3 MB in the beginning and 66.8 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2234.19 ms. Allocated memory is still 117.4 MB. Free memory was 66.1 MB in the beginning and 74.6 MB in the end (delta: -8.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 33.43 ms. Allocated memory is still 117.4 MB. Free memory was 74.6 MB in the beginning and 71.6 MB in the end (delta: 3.0 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<2 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND FALSE !(counter++<2) [L11] COND TRUE !(cond) VAL [counter=3] [L13] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131 SDtfs, 67 SDslu, 182 SDs, 0 SdLazy, 63 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 1232 SizeOfPredicates, 6 NumberOfNonLiveVariables, 319 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 4/4 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...