./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/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-a4ecdab [2020-11-30 01:43:01,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:43:01,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:43:01,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:43:01,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:43:01,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:43:01,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:43:01,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:43:01,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:43:01,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:43:01,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:43:01,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:43:01,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:43:01,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:43:01,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:43:01,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:43:01,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:43:01,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:43:01,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:43:01,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:43:01,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:43:01,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:43:01,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:43:01,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:43:01,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:43:01,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:43:01,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:43:01,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:43:01,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:43:01,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:43:01,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:43:01,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:43:01,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:43:01,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:43:01,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:43:01,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:43:01,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:43:01,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:43:01,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:43:01,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:43:01,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:43:01,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 01:43:01,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:43:01,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:43:01,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:43:01,239 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:43:01,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:43:01,240 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:43:01,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:43:01,241 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:43:01,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:43:01,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:43:01,242 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:43:01,242 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:43:01,242 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:43:01,242 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:43:01,243 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:43:01,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:43:01,244 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:43:01,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:43:01,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:43:01,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:43:01,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:43:01,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:43:01,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:43:01,246 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:43:01,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:43:01,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:43:01,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:43:01,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:43:01,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:43:01,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:43:01,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:43:01,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:43:01,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:43:01,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:43:01,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:43:01,249 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:43:01,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:43:01,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:43:01,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:43:01,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:43:01,251 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_da5e4b0b-27f1-4f69-9297-b191e550b537/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f48197f615b5bb3f646b16cb6d7957d384b7e1b [2020-11-30 01:43:01,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:43:01,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:43:01,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:43:01,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:43:01,617 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:43:01,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2020-11-30 01:43:01,729 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/data/122f4d72b/de530d34bb024a97bd5cde7947e8b360/FLAGc7e806a5a [2020-11-30 01:43:02,338 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:43:02,343 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2020-11-30 01:43:02,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/data/122f4d72b/de530d34bb024a97bd5cde7947e8b360/FLAGc7e806a5a [2020-11-30 01:43:02,651 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/data/122f4d72b/de530d34bb024a97bd5cde7947e8b360 [2020-11-30 01:43:02,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:43:02,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:43:02,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:43:02,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:43:02,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:43:02,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:43:02" (1/1) ... [2020-11-30 01:43:02,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a633222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:02, skipping insertion in model container [2020-11-30 01:43:02,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:43:02" (1/1) ... [2020-11-30 01:43:02,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:43:02,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:43:02,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:43:02,956 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:43:02,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:43:03,011 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:43:03,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03 WrapperNode [2020-11-30 01:43:03,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:43:03,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:43:03,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:43:03,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:43:03,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:43:03,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:43:03,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:43:03,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:43:03,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... [2020-11-30 01:43:03,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:43:03,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:43:03,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:43:03,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:43:03,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/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 [2020-11-30 01:43:03,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:43:03,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:43:03,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:43:03,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:43:03,859 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:43:03,859 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-30 01:43:03,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:43:03 BoogieIcfgContainer [2020-11-30 01:43:03,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:43:03,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:43:03,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:43:03,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:43:03,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:43:02" (1/3) ... [2020-11-30 01:43:03,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6e0a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:43:03, skipping insertion in model container [2020-11-30 01:43:03,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:43:03" (2/3) ... [2020-11-30 01:43:03,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6e0a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:43:03, skipping insertion in model container [2020-11-30 01:43:03,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:43:03" (3/3) ... [2020-11-30 01:43:03,873 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound1.c [2020-11-30 01:43:03,887 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:43:03,893 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-30 01:43:03,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-30 01:43:03,933 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:43:03,934 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:43:03,934 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:43:03,934 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:43:03,934 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:43:03,935 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:43:03,935 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:43:03,935 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:43:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-30 01:43:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:43:03,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:43:03,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:43:03,959 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]=== [2020-11-30 01:43:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:43:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash 165250771, now seen corresponding path program 1 times [2020-11-30 01:43:03,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:43:03,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330078203] [2020-11-30 01:43:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:43:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:43:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:43:04,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330078203] [2020-11-30 01:43:04,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:43:04,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:43:04,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155485680] [2020-11-30 01:43:04,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:43:04,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:43:04,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:43:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:43:04,153 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-30 01:43:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:43:04,175 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-11-30 01:43:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:43:04,177 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-30 01:43:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:43:04,188 INFO L225 Difference]: With dead ends: 65 [2020-11-30 01:43:04,188 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 01:43:04,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:43:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 01:43:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-30 01:43:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:43:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-30 01:43:04,233 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2020-11-30 01:43:04,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:43:04,234 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-30 01:43:04,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:43:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-30 01:43:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:43:04,235 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:43:04,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:43:04,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:43:04,236 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]=== [2020-11-30 01:43:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:43:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash 735362312, now seen corresponding path program 1 times [2020-11-30 01:43:04,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:43:04,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80389078] [2020-11-30 01:43:04,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:43:04,268 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:43:04,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808656045] [2020-11-30 01:43:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/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 [2020-11-30 01:43:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:43:04,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:43:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:43:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:43:04,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:43:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:43:04,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80389078] [2020-11-30 01:43:04,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:43:04,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808656045] [2020-11-30 01:43:04,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:43:04,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 01:43:04,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27613272] [2020-11-30 01:43:04,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:43:04,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:43:04,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:43:04,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:43:04,484 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2020-11-30 01:43:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:43:04,513 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-11-30 01:43:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:43:04,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-30 01:43:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:43:04,515 INFO L225 Difference]: With dead ends: 37 [2020-11-30 01:43:04,516 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:43:04,517 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 [2020-11-30 01:43:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:43:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 01:43:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:43:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-11-30 01:43:04,524 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2020-11-30 01:43:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:43:04,524 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-11-30 01:43:04,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:43:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-11-30 01:43:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:43:04,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:43:04,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:43:04,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 01:43:04,739 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]=== [2020-11-30 01:43:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:43:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1320528433, now seen corresponding path program 1 times [2020-11-30 01:43:04,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:43:04,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785051857] [2020-11-30 01:43:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:43:04,758 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:43:04,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037892041] [2020-11-30 01:43:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/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 [2020-11-30 01:43:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:43:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:43:04,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:43:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:43:04,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:43:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:43:04,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785051857] [2020-11-30 01:43:04,887 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:43:04,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037892041] [2020-11-30 01:43:04,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:43:04,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:43:04,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604204755] [2020-11-30 01:43:04,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:43:04,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:43:04,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:43:04,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:43:04,890 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-11-30 01:43:04,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:43:04,943 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-11-30 01:43:04,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:43:04,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 01:43:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:43:04,945 INFO L225 Difference]: With dead ends: 61 [2020-11-30 01:43:04,945 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 01:43:04,946 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 [2020-11-30 01:43:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 01:43:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-11-30 01:43:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:43:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 01:43:04,953 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2020-11-30 01:43:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:43:04,953 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 01:43:04,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:43:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 01:43:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:43:04,954 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:43:04,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:43:05,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:43:05,179 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]=== [2020-11-30 01:43:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:43:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 780891877, now seen corresponding path program 1 times [2020-11-30 01:43:05,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:43:05,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426929991] [2020-11-30 01:43:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:43:05,204 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:43:05,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095131795] [2020-11-30 01:43:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/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 [2020-11-30 01:43:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:43:05,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:43:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:43:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:43:05,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:43:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:43:05,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426929991] [2020-11-30 01:43:05,346 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:43:05,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095131795] [2020-11-30 01:43:05,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:43:05,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-30 01:43:05,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959093073] [2020-11-30 01:43:05,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:43:05,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:43:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:43:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:43:05,351 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-11-30 01:43:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:43:05,398 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-11-30 01:43:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:43:05,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:43:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:43:05,401 INFO L225 Difference]: With dead ends: 44 [2020-11-30 01:43:05,401 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:43:05,402 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 [2020-11-30 01:43:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:43:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 01:43:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:43:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-30 01:43:05,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-11-30 01:43:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:43:05,405 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-30 01:43:05,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:43:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-30 01:43:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:43:05,407 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:43:05,407 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:43:05,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:43:05,608 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]=== [2020-11-30 01:43:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:43:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1361720655, now seen corresponding path program 1 times [2020-11-30 01:43:05,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:43:05,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991382834] [2020-11-30 01:43:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:43:05,631 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:43:05,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407205970] [2020-11-30 01:43:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/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 [2020-11-30 01:43:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:43:05,713 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:43:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:43:05,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:43:05,797 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 01:43:05,798 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:43:06,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:43:06,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:43:06 BoogieIcfgContainer [2020-11-30 01:43:06,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:43:06,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:43:06,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:43:06,048 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:43:06,048 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:43:03" (3/4) ... [2020-11-30 01:43:06,051 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:43:06,113 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_da5e4b0b-27f1-4f69-9297-b191e550b537/bin/utaipan/witness.graphml [2020-11-30 01:43:06,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:43:06,115 INFO L168 Benchmark]: Toolchain (without parser) took 3456.84 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 74.9 MB in the beginning and 103.1 MB in the end (delta: -28.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:43:06,116 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory was 81.9 MB in the beginning and 81.9 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:43:06,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.71 ms. Allocated memory is still 109.1 MB. Free memory was 74.7 MB in the beginning and 86.0 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:06,118 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.14 ms. Allocated memory is still 109.1 MB. Free memory was 86.0 MB in the beginning and 83.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:06,119 INFO L168 Benchmark]: Boogie Preprocessor took 37.70 ms. Allocated memory is still 109.1 MB. Free memory was 83.9 MB in the beginning and 82.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:06,119 INFO L168 Benchmark]: RCFGBuilder took 744.30 ms. Allocated memory is still 109.1 MB. Free memory was 82.9 MB in the beginning and 58.7 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:06,120 INFO L168 Benchmark]: TraceAbstraction took 2182.55 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 58.2 MB in the beginning and 106.1 MB in the end (delta: -47.9 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:06,121 INFO L168 Benchmark]: Witness Printer took 65.84 ms. Allocated memory is still 132.1 MB. Free memory was 106.1 MB in the beginning and 103.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:06,136 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory was 81.9 MB in the beginning and 81.9 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.71 ms. Allocated memory is still 109.1 MB. Free memory was 74.7 MB in the beginning and 86.0 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.14 ms. Allocated memory is still 109.1 MB. Free memory was 86.0 MB in the beginning and 83.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.70 ms. Allocated memory is still 109.1 MB. Free memory was 83.9 MB in the beginning and 82.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 744.30 ms. Allocated memory is still 109.1 MB. Free memory was 82.9 MB in the beginning and 58.7 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2182.55 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 58.2 MB in the beginning and 106.1 MB in the end (delta: -47.9 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * Witness Printer took 65.84 ms. Allocated memory is still 132.1 MB. Free memory was 106.1 MB in the beginning and 103.1 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: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] [L4] __assert_fail("0", "egcd3-ll.c", 4, "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: 2.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, 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, 0.1s 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, 0.2s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 650 SizeOfPredicates, 5 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...