./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.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_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/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 1f48197f615b5bb3f646b16cb6d7957d384b7e1b ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:04:27,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:04:27,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:04:27,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:04:27,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:04:27,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:04:27,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:04:27,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:04:27,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:04:27,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:04:27,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:04:27,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:04:27,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:04:27,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:04:27,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:04:27,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:04:27,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:04:27,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:04:27,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:04:27,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:04:27,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:04:27,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:04:27,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:04:27,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:04:27,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:04:27,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:04:27,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:04:27,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:04:27,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:04:27,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:04:27,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:04:27,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:04:27,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:04:27,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:04:27,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:04:27,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:04:27,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:04:27,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:04:27,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:04:27,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:04:27,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:04:27,876 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:04:27,903 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:04:27,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:04:27,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:04:27,904 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:04:27,905 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:04:27,905 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:04:27,905 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:04:27,905 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:04:27,905 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:04:27,905 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:04:27,906 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:04:27,906 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:04:27,906 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:04:27,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:04:27,911 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:04:27,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:04:27,912 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:04:27,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:04:27,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:04:27,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:04:27,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:04:27,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:04:27,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:04:27,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:04:27,913 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:04:27,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:04:27,914 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:04:27,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:04:27,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:04:27,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:04:27,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:04:27,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:04:27,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:04:27,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:04:27,915 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:04:27,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:04:27,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:04:27,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:04:27,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:04:27,916 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_89c985c4-f5c2-445f-ae68-820eeefdca8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f48197f615b5bb3f646b16cb6d7957d384b7e1b [2020-12-09 10:04:28,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:04:28,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:04:28,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:04:28,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:04:28,114 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:04:28,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2020-12-09 10:04:28,158 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/data/0b5a16440/3479a6869c9a4d7c90fb217f903d2712/FLAG8d8c57e09 [2020-12-09 10:04:28,505 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:04:28,505 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2020-12-09 10:04:28,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/data/0b5a16440/3479a6869c9a4d7c90fb217f903d2712/FLAG8d8c57e09 [2020-12-09 10:04:28,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/data/0b5a16440/3479a6869c9a4d7c90fb217f903d2712 [2020-12-09 10:04:28,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:04:28,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:04:28,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:04:28,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:04:28,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:04:28,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:04:28" (1/1) ... [2020-12-09 10:04:28,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ad509e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:28, skipping insertion in model container [2020-12-09 10:04:28,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:04:28" (1/1) ... [2020-12-09 10:04:28,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:04:28,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:04:29,051 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_89c985c4-f5c2-445f-ae68-820eeefdca8f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c[490,503] [2020-12-09 10:04:29,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:04:29,070 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:04:29,078 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_89c985c4-f5c2-445f-ae68-820eeefdca8f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c[490,503] [2020-12-09 10:04:29,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:04:29,094 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:04:29,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29 WrapperNode [2020-12-09 10:04:29,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:04:29,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:04:29,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:04:29,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:04:29,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:04:29,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:04:29,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:04:29,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:04:29,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... [2020-12-09 10:04:29,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:04:29,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:04:29,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:04:29,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:04:29,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/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 10:04:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:04:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:04:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:04:29,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:04:29,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:04:29,444 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-09 10:04:29,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:04:29 BoogieIcfgContainer [2020-12-09 10:04:29,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:04:29,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:04:29,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:04:29,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:04:29,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:04:28" (1/3) ... [2020-12-09 10:04:29,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77225025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:04:29, skipping insertion in model container [2020-12-09 10:04:29,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:04:29" (2/3) ... [2020-12-09 10:04:29,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77225025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:04:29, skipping insertion in model container [2020-12-09 10:04:29,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:04:29" (3/3) ... [2020-12-09 10:04:29,452 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound1.c [2020-12-09 10:04:29,461 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:04:29,463 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 10:04:29,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 10:04:29,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:04:29,487 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:04:29,487 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:04:29,487 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:04:29,487 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:04:29,487 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:04:29,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:04:29,488 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:04:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 10:04:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 10:04:29,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:04:29,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 10:04:29,503 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 10:04:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:04:29,506 INFO L82 PathProgramCache]: Analyzing trace with hash 160510030, now seen corresponding path program 1 times [2020-12-09 10:04:29,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:04:29,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460901634] [2020-12-09 10:04:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:04:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:04:29,608 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 10:04:29,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460901634] [2020-12-09 10:04:29,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:04:29,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:04:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314778000] [2020-12-09 10:04:29,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 10:04:29,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:04:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 10:04:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 10:04:29,623 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-09 10:04:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:04:29,636 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-12-09 10:04:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 10:04:29,637 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 10:04:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:04:29,643 INFO L225 Difference]: With dead ends: 65 [2020-12-09 10:04:29,643 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 10:04:29,645 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 10:04:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 10:04:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 10:04:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 10:04:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-09 10:04:29,668 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2020-12-09 10:04:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:04:29,668 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-09 10:04:29,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 10:04:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-09 10:04:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 10:04:29,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:04:29,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 10:04:29,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:04:29,669 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 10:04:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:04:29,669 INFO L82 PathProgramCache]: Analyzing trace with hash 592212585, now seen corresponding path program 1 times [2020-12-09 10:04:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:04:29,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018396038] [2020-12-09 10:04:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:04:29,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:04:29,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027419470] [2020-12-09 10:04:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/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 10:04:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:04:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:04:29,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:04:29,777 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 10:04:29,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:04:29,793 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 10:04:29,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018396038] [2020-12-09 10:04:29,794 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:04:29,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027419470] [2020-12-09 10:04:29,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:04:29,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-12-09 10:04:29,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169313747] [2020-12-09 10:04:29,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:04:29,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:04:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:04:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:04:29,798 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2020-12-09 10:04:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:04:29,819 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-12-09 10:04:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:04:29,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 10:04:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:04:29,820 INFO L225 Difference]: With dead ends: 37 [2020-12-09 10:04:29,820 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 10:04:29,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:04:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 10:04:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 10:04:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 10:04:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-09 10:04:29,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2020-12-09 10:04:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:04:29,827 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-09 10:04:29,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:04:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-09 10:04:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 10:04:29,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:04:29,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:04:30,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 10:04:30,031 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 10:04:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:04:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1177973352, now seen corresponding path program 1 times [2020-12-09 10:04:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:04:30,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042978893] [2020-12-09 10:04:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:04:30,081 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:04:30,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329016332] [2020-12-09 10:04:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/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 10:04:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:04:30,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 10:04:30,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:04:30,256 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 10:04:30,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:04:30,264 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 10:04:30,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042978893] [2020-12-09 10:04:30,265 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:04:30,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329016332] [2020-12-09 10:04:30,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:04:30,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-09 10:04:30,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076837482] [2020-12-09 10:04:30,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:04:30,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:04:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:04:30,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:04:30,268 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-12-09 10:04:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:04:30,296 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-09 10:04:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:04:30,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 10:04:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:04:30,298 INFO L225 Difference]: With dead ends: 61 [2020-12-09 10:04:30,298 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 10:04:30,298 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 10:04:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 10:04:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-12-09 10:04:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 10:04:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-09 10:04:30,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2020-12-09 10:04:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:04:30,304 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-09 10:04:30,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:04:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-09 10:04:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 10:04:30,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:04:30,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:04:30,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:04:30,506 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 10:04:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:04:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1175714080, now seen corresponding path program 1 times [2020-12-09 10:04:30,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:04:30,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731447845] [2020-12-09 10:04:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:04:30,562 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:04:30,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247613528] [2020-12-09 10:04:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/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 10:04:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:04:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 10:04:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:04:30,673 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 10:04:30,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:04:30,686 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 10:04:30,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731447845] [2020-12-09 10:04:30,687 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:04:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247613528] [2020-12-09 10:04:30,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:04:30,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-12-09 10:04:30,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915008851] [2020-12-09 10:04:30,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:04:30,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:04:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:04:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:04:30,688 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-09 10:04:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:04:30,706 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-09 10:04:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:04:30,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 10:04:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:04:30,707 INFO L225 Difference]: With dead ends: 44 [2020-12-09 10:04:30,707 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 10:04:30,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:04:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 10:04:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 10:04:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 10:04:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 10:04:30,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-09 10:04:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:04:30,710 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 10:04:30,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:04:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 10:04:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 10:04:30,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:04:30,711 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:04:30,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:04:30,913 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 10:04:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:04:30,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2121654826, now seen corresponding path program 1 times [2020-12-09 10:04:30,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:04:30,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700881234] [2020-12-09 10:04:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:04:30,955 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:04:30,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961570402] [2020-12-09 10:04:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/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 10:04:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:04:31,069 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:04:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:04:31,082 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:04:31,116 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 10:04:31,117 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 10:04:31,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:04:31,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:04:31 BoogieIcfgContainer [2020-12-09 10:04:31,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:04:31,377 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:04:31,377 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:04:31,377 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:04:31,378 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:04:29" (3/4) ... [2020-12-09 10:04:31,379 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 10:04:31,410 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_89c985c4-f5c2-445f-ae68-820eeefdca8f/bin/utaipan/witness.graphml [2020-12-09 10:04:31,410 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:04:31,411 INFO L168 Benchmark]: Toolchain (without parser) took 2475.04 ms. Allocated memory is still 121.6 MB. Free memory was 100.7 MB in the beginning and 38.1 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:04:31,412 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 81.8 MB. Free memory was 56.8 MB in the beginning and 56.7 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:04:31,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.55 ms. Allocated memory is still 121.6 MB. Free memory was 100.7 MB in the beginning and 90.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:04:31,412 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.18 ms. Allocated memory is still 121.6 MB. Free memory was 90.4 MB in the beginning and 88.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:04:31,413 INFO L168 Benchmark]: Boogie Preprocessor took 23.03 ms. Allocated memory is still 121.6 MB. Free memory was 88.8 MB in the beginning and 87.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:04:31,413 INFO L168 Benchmark]: RCFGBuilder took 297.15 ms. Allocated memory is still 121.6 MB. Free memory was 87.7 MB in the beginning and 63.1 MB in the end (delta: 24.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:04:31,414 INFO L168 Benchmark]: TraceAbstraction took 1930.10 ms. Allocated memory is still 121.6 MB. Free memory was 62.6 MB in the beginning and 40.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:04:31,414 INFO L168 Benchmark]: Witness Printer took 33.25 ms. Allocated memory is still 121.6 MB. Free memory was 40.8 MB in the beginning and 38.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:04:31,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 81.8 MB. Free memory was 56.8 MB in the beginning and 56.7 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 158.55 ms. Allocated memory is still 121.6 MB. Free memory was 100.7 MB in the beginning and 90.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.18 ms. Allocated memory is still 121.6 MB. Free memory was 90.4 MB in the beginning and 88.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.03 ms. Allocated memory is still 121.6 MB. Free memory was 88.8 MB in the beginning and 87.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 297.15 ms. Allocated memory is still 121.6 MB. Free memory was 87.7 MB in the beginning and 63.1 MB in the end (delta: 24.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1930.10 ms. Allocated memory is still 121.6 MB. Free memory was 62.6 MB in the beginning and 40.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. * Witness Printer took 33.25 ms. Allocated memory is still 121.6 MB. Free memory was 40.8 MB in the beginning and 38.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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++<1 [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 FALSE !(counter++<1) [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++<1) [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: 1.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 41 SDslu, 98 SDs, 0 SdLazy, 34 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 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, 4 MinimizatonAttempts, 23 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 650 SizeOfPredicates, 4 NumberOfNonLiveVariables, 223 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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...