./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9 --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 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 21:01:36,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:01:36,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:01:36,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:01:36,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:01:36,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:01:36,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:01:36,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:01:36,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:01:36,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:01:36,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:01:36,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:01:36,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:01:36,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:01:36,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:01:36,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:01:36,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:01:36,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:01:36,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:01:36,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:01:36,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:01:36,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:01:36,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:01:36,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:01:36,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:01:36,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:01:36,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:01:36,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:01:36,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:01:36,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:01:36,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:01:36,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:01:36,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:01:36,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:01:36,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:01:36,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:01:36,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:01:36,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:01:36,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:01:36,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:01:36,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:01:36,371 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:01:36,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:01:36,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:01:36,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:01:36,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:01:36,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:01:36,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:01:36,419 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:01:36,420 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:01:36,420 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:01:36,420 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:01:36,421 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:01:36,421 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:01:36,422 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:01:36,422 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:01:36,422 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:01:36,422 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:01:36,423 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:01:36,423 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:01:36,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:01:36,424 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:01:36,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:01:36,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:01:36,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:01:36,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:01:36,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:01:36,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:01:36,426 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:01:36,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:01:36,427 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:01:36,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:01:36,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:01:36,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:01:36,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:01:36,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:01:36,438 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:01:36,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:01:36,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:01:36,438 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:01:36,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:01:36,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:01:36,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:01:36,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2022-11-20 21:01:36,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:01:36,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:01:36,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:01:36,777 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:01:36,777 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:01:36,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2022-11-20 21:01:39,802 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:01:39,998 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:01:39,999 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2022-11-20 21:01:40,006 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/data/d85f8c784/b63a621efa994f8babe89b9da3db3767/FLAGd09ada0c1 [2022-11-20 21:01:40,019 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/data/d85f8c784/b63a621efa994f8babe89b9da3db3767 [2022-11-20 21:01:40,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:01:40,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:01:40,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:01:40,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:01:40,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:01:40,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c73b848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40, skipping insertion in model container [2022-11-20 21:01:40,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:01:40,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:01:40,186 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2022-11-20 21:01:40,212 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2022-11-20 21:01:40,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:01:40,226 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:01:40,242 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2022-11-20 21:01:40,252 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2022-11-20 21:01:40,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:01:40,267 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:01:40,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40 WrapperNode [2022-11-20 21:01:40,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:01:40,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:01:40,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:01:40,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:01:40,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,307 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-11-20 21:01:40,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:01:40,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:01:40,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:01:40,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:01:40,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,331 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:01:40,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:01:40,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:01:40,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:01:40,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (1/1) ... [2022-11-20 21:01:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:01:40,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:01:40,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:01:40,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:01:40,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:01:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-20 21:01:40,417 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-20 21:01:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-20 21:01:40,417 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-20 21:01:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:01:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:01:40,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:01:40,491 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:01:40,492 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:01:40,665 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:01:40,723 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:01:40,723 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 21:01:40,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:01:40 BoogieIcfgContainer [2022-11-20 21:01:40,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:01:40,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:01:40,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:01:40,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:01:40,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:01:40" (1/3) ... [2022-11-20 21:01:40,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0fa9c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:01:40, skipping insertion in model container [2022-11-20 21:01:40,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:40" (2/3) ... [2022-11-20 21:01:40,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0fa9c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:01:40, skipping insertion in model container [2022-11-20 21:01:40,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:01:40" (3/3) ... [2022-11-20 21:01:40,736 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_6.i [2022-11-20 21:01:40,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:01:40,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 21:01:40,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:01:40,809 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36063b98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:01:40,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 21:01:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:01:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:01:40,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:40,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:01:40,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:40,827 INFO L85 PathProgramCache]: Analyzing trace with hash -499021812, now seen corresponding path program 1 times [2022-11-20 21:01:40,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:40,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653070435] [2022-11-20 21:01:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:40,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:41,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:41,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653070435] [2022-11-20 21:01:41,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653070435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:41,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:41,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:01:41,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956920934] [2022-11-20 21:01:41,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:41,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:01:41,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:41,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:01:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:01:41,465 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:41,720 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-20 21:01:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:01:41,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:01:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:41,731 INFO L225 Difference]: With dead ends: 45 [2022-11-20 21:01:41,731 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 21:01:41,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:01:41,738 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:41,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 64 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:01:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 21:01:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 21:01:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:01:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-20 21:01:41,779 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2022-11-20 21:01:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:41,780 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-20 21:01:41,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-20 21:01:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:01:41,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:41,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:01:41,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:01:41,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:41,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1643785969, now seen corresponding path program 1 times [2022-11-20 21:01:41,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:41,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155165285] [2022-11-20 21:01:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:41,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:41,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:01:41,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157001296] [2022-11-20 21:01:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:41,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:01:41,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:01:41,805 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:01:41,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:01:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:41,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:01:41,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:51,471 WARN L233 SmtUtils]: Spent 8.64s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:01:53,878 WARN L859 $PredicateComparison]: unable to prove that (or (and (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (< |c_ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse1 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse0 (<= .cse1 127))) (or (and (not .cse0) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= 0 (mod (+ .cse1 (- 256)) |ULTIMATE.start_gcd_test_#res#1|)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) (and .cse0 (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= (mod (mod .cse1 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))))))))) is different from true [2022-11-20 21:01:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:54,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:02:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:02,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:02:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155165285] [2022-11-20 21:02:02,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:02:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157001296] [2022-11-20 21:02:02,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157001296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:02:02,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017944591] [2022-11-20 21:02:02,767 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 21:02:02,768 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:02:02,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:02:02,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:02:02,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:02:05,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:02:08,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '175#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~b#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (< 0 |ULTIMATE.start_main1_~x~0#1|) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (ite (<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main1_~y~0#1| 128)) (= |#NULL.base| 0))' at error location [2022-11-20 21:02:08,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:02:08,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:02:08,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-20 21:02:08,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286937395] [2022-11-20 21:02:08,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:02:08,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:02:08,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:02:08,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:02:08,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=145, Unknown=3, NotChecked=24, Total=210 [2022-11-20 21:02:08,386 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:10,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:13,047 WARN L859 $PredicateComparison]: unable to prove that (and (or (and (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (< |c_ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse1 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse0 (<= .cse1 127))) (or (and (not .cse0) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= 0 (mod (+ .cse1 (- 256)) |ULTIMATE.start_gcd_test_#res#1|)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) (and .cse0 (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= (mod (mod .cse1 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))))))))) (or (<= |c_ULTIMATE.start_main1_~g~0#1| |c_ULTIMATE.start_main1_~x~0#1|) (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)))) is different from true [2022-11-20 21:02:15,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:15,456 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-20 21:02:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:02:15,457 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:02:15,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:15,458 INFO L225 Difference]: With dead ends: 26 [2022-11-20 21:02:15,459 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 21:02:15,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=40, Invalid=146, Unknown=4, NotChecked=50, Total=240 [2022-11-20 21:02:15,461 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:15,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 2 Unknown, 30 Unchecked, 4.9s Time] [2022-11-20 21:02:15,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 21:02:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-20 21:02:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:02:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-20 21:02:15,469 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2022-11-20 21:02:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:15,470 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-20 21:02:15,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-20 21:02:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:02:15,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:15,472 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:15,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 21:02:15,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:02:15,678 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:02:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash -648649556, now seen corresponding path program 2 times [2022-11-20 21:02:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:02:15,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186567060] [2022-11-20 21:02:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:15,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:02:15,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:02:15,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381845877] [2022-11-20 21:02:15,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:02:15,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:02:15,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:02:15,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:02:15,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:02:15,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:02:15,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:02:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:02:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:20,375 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (< |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256))) (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (<= .cse0 127) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| .cse0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (= .cse1 .cse2) (not (<= .cse1 127)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)))))) (not .cse3)) (and .cse3 (let ((.cse10 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse11 (<= .cse10 127))) (or (and (let ((.cse5 (+ .cse10 (- 256)))) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse4 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse4 256)) (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= .cse4 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse6 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= (mod (+ .cse6 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256) .cse2) (not (<= (mod .cse6 256) 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse7 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256)) (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse7 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse8 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= (mod (+ .cse8 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256) .cse2) (not (= .cse8 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse9 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= .cse9 0)) (= (mod (+ .cse9 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256) .cse2)))))) (not .cse11)) (and .cse11 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse10 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))))))))) is different from true [2022-11-20 21:02:23,450 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256))) (or (and (not .cse0) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (not (<= .cse1 127)) (= .cse2 .cse1) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse3 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (<= .cse3 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse3) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))))) (and .cse0 (let ((.cse11 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse4 (<= .cse11 127))) (or (and (not .cse4) (let ((.cse6 (+ .cse11 (- 256)))) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse5 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse2 (mod (+ .cse5 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= .cse5 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse7 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse7 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse7 256))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse8 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= .cse2 (mod (+ .cse8 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)) (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (not (= .cse8 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse9 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= .cse9 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse9 256))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse10 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse2 (mod (+ .cse10 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (<= (mod .cse10 256) 127)))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse11 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)))) .cse4))))))) is different from true [2022-11-20 21:02:31,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 139 [2022-11-20 21:02:31,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:02:31,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186567060] [2022-11-20 21:02:31,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:02:31,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381845877] [2022-11-20 21:02:31,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. [2022-11-20 21:02:31,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287444376] [2022-11-20 21:02:31,672 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 21:02:31,673 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:02:31,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:02:31,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:02:31,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:02:31,678 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:273) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-11-20 21:02:31,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:02:31,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-20 21:02:31,683 ERROR L170 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2022-11-20 21:02:31,683 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-20 21:02:31,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-20 21:02:31,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 21:02:31,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:02:31,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:02:31,906 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1] [2022-11-20 21:02:31,909 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 21:02:31,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:02:31 BoogieIcfgContainer [2022-11-20 21:02:31,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 21:02:31,924 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 21:02:31,924 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 21:02:31,925 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 21:02:31,925 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:01:40" (3/4) ... [2022-11-20 21:02:31,928 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 21:02:31,928 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 21:02:31,929 INFO L158 Benchmark]: Toolchain (without parser) took 51905.29ms. Allocated memory was 169.9MB in the beginning and 207.6MB in the end (delta: 37.7MB). Free memory was 122.9MB in the beginning and 99.9MB in the end (delta: 22.9MB). Peak memory consumption was 62.5MB. Max. memory is 16.1GB. [2022-11-20 21:02:31,929 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 169.9MB. Free memory is still 138.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:02:31,929 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.25ms. Allocated memory is still 169.9MB. Free memory was 122.9MB in the beginning and 111.4MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 21:02:31,930 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.25ms. Allocated memory is still 169.9MB. Free memory was 111.4MB in the beginning and 109.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:02:31,930 INFO L158 Benchmark]: Boogie Preprocessor took 26.26ms. Allocated memory is still 169.9MB. Free memory was 109.5MB in the beginning and 108.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:02:31,931 INFO L158 Benchmark]: RCFGBuilder took 391.19ms. Allocated memory is still 169.9MB. Free memory was 108.3MB in the beginning and 92.7MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-20 21:02:31,931 INFO L158 Benchmark]: TraceAbstraction took 51194.40ms. Allocated memory was 169.9MB in the beginning and 207.6MB in the end (delta: 37.7MB). Free memory was 92.1MB in the beginning and 100.6MB in the end (delta: -8.5MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. [2022-11-20 21:02:31,931 INFO L158 Benchmark]: Witness Printer took 3.82ms. Allocated memory is still 207.6MB. Free memory is still 99.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:02:31,933 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 169.9MB. Free memory is still 138.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.25ms. Allocated memory is still 169.9MB. Free memory was 122.9MB in the beginning and 111.4MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.25ms. Allocated memory is still 169.9MB. Free memory was 111.4MB in the beginning and 109.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.26ms. Allocated memory is still 169.9MB. Free memory was 109.5MB in the beginning and 108.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 391.19ms. Allocated memory is still 169.9MB. Free memory was 108.3MB in the beginning and 92.7MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 51194.40ms. Allocated memory was 169.9MB in the beginning and 207.6MB in the end (delta: 37.7MB). Free memory was 92.1MB in the beginning and 100.6MB in the end (delta: -8.5MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. * Witness Printer took 3.82ms. Allocated memory is still 207.6MB. Free memory is still 99.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L108] COND TRUE __VERIFIER_nondet_int() [L109] CALL main1() [L49] signed char x = __VERIFIER_nondet_char(); [L50] signed char y = __VERIFIER_nondet_char(); [L51] signed char g; [L53] CALL, EXPR gcd_test(x, y) [L33] signed char t; [L35] COND TRUE a < (signed char)0 [L35] a = -a [L36] COND FALSE !(b < (signed char)0) [L38] COND TRUE b != (signed char)0 [L39] t = b [L40] b = a % b [L41] a = t [L38] COND TRUE b != (signed char)0 [L39] t = b [L40] b = a % b [L41] a = t [L38] COND FALSE !(b != (signed char)0) [L43] return a; [L53] RET, EXPR gcd_test(x, y) [L53] g = gcd_test(x, y) [L55] COND TRUE x > (signed char)0 [L56] CALL __VERIFIER_assert(x >= g) [L26] COND TRUE !(cond) [L27] reach_error() - UnprovableResult [Line: 102]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 51.1s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 160 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 30 IncrementalHoareTripleChecker+Unchecked, 130 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 91 IncrementalHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 30 mSDtfsCounter, 91 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 23.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 12, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 37.1s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 2 QuantifiedInterpolants, 386 SizeOfPredicates, 9 NumberOfNonLiveVariables, 161 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9 --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 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 21:02:34,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:02:34,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:02:34,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:02:34,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:02:34,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:02:34,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:02:34,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:02:34,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:02:34,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:02:34,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:02:34,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:02:34,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:02:34,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:02:34,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:02:34,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:02:34,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:02:34,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:02:34,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:02:34,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:02:34,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:02:34,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:02:34,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:02:34,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:02:34,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:02:34,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:02:34,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:02:34,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:02:34,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:02:34,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:02:34,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:02:34,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:02:34,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:02:34,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:02:34,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:02:34,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:02:34,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:02:34,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:02:34,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:02:34,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:02:34,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:02:34,326 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-20 21:02:34,367 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:02:34,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:02:34,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:02:34,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:02:34,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:02:34,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:02:34,371 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:02:34,371 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:02:34,372 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:02:34,372 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:02:34,373 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:02:34,373 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:02:34,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:02:34,375 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:02:34,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:02:34,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:02:34,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:02:34,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:02:34,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:02:34,376 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:02:34,377 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 21:02:34,377 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 21:02:34,377 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:02:34,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:02:34,378 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:02:34,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:02:34,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:02:34,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 21:02:34,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:02:34,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:02:34,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:02:34,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:02:34,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:02:34,381 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 21:02:34,381 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 21:02:34,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:02:34,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:02:34,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 21:02:34,383 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2022-11-20 21:02:34,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:02:34,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:02:34,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:02:34,828 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:02:34,829 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:02:34,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2022-11-20 21:02:38,321 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:02:38,593 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:02:38,594 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2022-11-20 21:02:38,606 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/data/09fcfd5cb/8d622a2e62d345a08ddad7d4a21bbe69/FLAGc4949f7bb [2022-11-20 21:02:38,636 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/data/09fcfd5cb/8d622a2e62d345a08ddad7d4a21bbe69 [2022-11-20 21:02:38,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:02:38,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:02:38,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:02:38,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:02:38,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:02:38,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:38,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cbe2e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38, skipping insertion in model container [2022-11-20 21:02:38,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:38,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:02:38,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:02:38,861 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2022-11-20 21:02:38,888 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2022-11-20 21:02:38,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:02:38,906 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:02:38,924 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2022-11-20 21:02:38,937 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2022-11-20 21:02:38,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:02:38,958 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:02:38,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38 WrapperNode [2022-11-20 21:02:38,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:02:38,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:02:38,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:02:38,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:02:38,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:38,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,010 INFO L138 Inliner]: procedures = 28, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 80 [2022-11-20 21:02:39,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:02:39,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:02:39,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:02:39,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:02:39,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,042 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:02:39,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:02:39,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:02:39,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:02:39,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (1/1) ... [2022-11-20 21:02:39,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:02:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:02:39,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:02:39,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:02:39,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:02:39,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 21:02:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-20 21:02:39,150 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-20 21:02:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-20 21:02:39,150 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-20 21:02:39,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:02:39,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:02:39,279 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:02:39,281 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:02:48,572 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:02:48,580 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:02:48,581 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 21:02:48,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:02:48 BoogieIcfgContainer [2022-11-20 21:02:48,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:02:48,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:02:48,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:02:48,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:02:48,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:02:38" (1/3) ... [2022-11-20 21:02:48,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6e6500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:02:48, skipping insertion in model container [2022-11-20 21:02:48,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:38" (2/3) ... [2022-11-20 21:02:48,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6e6500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:02:48, skipping insertion in model container [2022-11-20 21:02:48,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:02:48" (3/3) ... [2022-11-20 21:02:48,594 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_6.i [2022-11-20 21:02:48,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:02:48,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 21:02:48,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:02:48,675 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@32d7bcc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:02:48,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 21:02:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:02:48,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:02:48,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:48,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:48,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:02:48,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:48,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-11-20 21:02:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:02:48,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992780029] [2022-11-20 21:02:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:48,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:02:48,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:02:48,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:02:48,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 21:02:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:48,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:02:48,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:48,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:02:48,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:02:48,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992780029] [2022-11-20 21:02:48,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992780029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:48,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:02:48,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:02:48,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648869225] [2022-11-20 21:02:48,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:02:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:02:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:02:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:02:49,012 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:49,058 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-11-20 21:02:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:02:49,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:02:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:49,069 INFO L225 Difference]: With dead ends: 68 [2022-11-20 21:02:49,069 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 21:02:49,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:02:49,079 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:49,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-11-20 21:02:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 21:02:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 21:02:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:02:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-20 21:02:49,126 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2022-11-20 21:02:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:49,127 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-20 21:02:49,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-20 21:02:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:02:49,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:49,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:49,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:02:49,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:02:49,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:02:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-11-20 21:02:49,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:02:49,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987376380] [2022-11-20 21:02:49,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:49,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:02:49,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:02:49,354 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:02:49,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 21:02:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:02:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:49,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:02:49,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:02:49,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987376380] [2022-11-20 21:02:49,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987376380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:49,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:02:49,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:02:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291605453] [2022-11-20 21:02:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:49,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:02:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:02:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:02:49,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:02:49,622 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:49,801 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-20 21:02:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:02:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:02:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:49,805 INFO L225 Difference]: With dead ends: 46 [2022-11-20 21:02:49,805 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 21:02:49,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:02:49,807 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:49,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:02:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 21:02:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-20 21:02:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:02:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-20 21:02:49,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-20 21:02:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:49,819 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-20 21:02:49,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-20 21:02:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:02:49,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:49,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:49,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:02:50,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:02:50,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:02:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash -743724587, now seen corresponding path program 1 times [2022-11-20 21:02:50,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:02:50,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408229352] [2022-11-20 21:02:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:50,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:02:50,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:02:50,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:02:50,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 21:02:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:02:50,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:50,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:02:50,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:02:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408229352] [2022-11-20 21:02:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408229352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:50,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:02:50,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 21:02:50,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181966650] [2022-11-20 21:02:50,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:50,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:02:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:02:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:02:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:02:50,611 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:51,284 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-20 21:02:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:02:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:02:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:51,286 INFO L225 Difference]: With dead ends: 37 [2022-11-20 21:02:51,286 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 21:02:51,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:02:51,288 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:51,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 155 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:02:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 21:02:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-20 21:02:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:02:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-20 21:02:51,297 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-20 21:02:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:51,297 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-20 21:02:51,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-20 21:02:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:02:51,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:51,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:51,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:02:51,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:02:51,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:02:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-11-20 21:02:51,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:02:51,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050615107] [2022-11-20 21:02:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:51,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:02:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:02:51,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:02:51,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 21:02:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:02:51,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:54,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:15,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:15,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050615107] [2022-11-20 21:03:15,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050615107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:15,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1758124549] [2022-11-20 21:03:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:15,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:03:15,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:03:15,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:03:15,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-20 21:03:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:15,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:03:15,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:29,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:43,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1758124549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:43,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188539933] [2022-11-20 21:03:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:43,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:43,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:43,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:43,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:03:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:43,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:03:43,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:58,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:58,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188539933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:58,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:03:58,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 28 [2022-11-20 21:03:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589765953] [2022-11-20 21:03:58,827 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:03:58,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 21:03:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 21:03:58,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=610, Unknown=12, NotChecked=0, Total=756 [2022-11-20 21:03:58,835 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:06,651 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 26 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:04:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:06,672 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-11-20 21:04:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 21:04:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:04:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:06,674 INFO L225 Difference]: With dead ends: 47 [2022-11-20 21:04:06,674 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 21:04:06,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 68.1s TimeCoverageRelationStatistics Valid=141, Invalid=659, Unknown=12, NotChecked=0, Total=812 [2022-11-20 21:04:06,676 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:06,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 295 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-11-20 21:04:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 21:04:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-11-20 21:04:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:04:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-20 21:04:06,684 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 12 [2022-11-20 21:04:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:06,684 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-20 21:04:06,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-20 21:04:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:04:06,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:06,686 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:06,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:06,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:07,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:07,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:07,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2022-11-20 21:04:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:07,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285098961] [2022-11-20 21:04:07,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:04:07,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:07,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:07,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:04:07,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 21:04:12,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:04:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:04:12,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:04:12,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:37,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:26,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285098961] [2022-11-20 21:06:26,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285098961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1264449787] [2022-11-20 21:06:26,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:06:26,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:26,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:06:26,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:06:26,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 21:06:26,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:06:26,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:06:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:06:26,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:18,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:26,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1264449787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:26,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882066388] [2022-11-20 21:07:26,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:07:26,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:07:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:07:26,018 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:07:26,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:07:31,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:07:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:07:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:07:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:46,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:52,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882066388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:52,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:07:52,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 24 [2022-11-20 21:07:52,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707372044] [2022-11-20 21:07:52,763 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:07:52,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 21:07:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 21:07:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=435, Unknown=41, NotChecked=0, Total=552 [2022-11-20 21:07:52,765 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:54,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:05,528 WARN L233 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 45 DAG size of output: 3 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:16,903 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 27 DAG size of output: 8 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:25,714 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 35 DAG size of output: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:09:01,217 WARN L233 SmtUtils]: Spent 28.41s on a formula simplification. DAG size of input: 40 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:09:40,831 WARN L233 SmtUtils]: Spent 18.14s on a formula simplification. DAG size of input: 36 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:10:45,974 WARN L233 SmtUtils]: Spent 38.49s on a formula simplification. DAG size of input: 45 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:11:23,610 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 33 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:11:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:11:23,632 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-11-20 21:11:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 21:11:23,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:11:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:11:23,634 INFO L225 Difference]: With dead ends: 47 [2022-11-20 21:11:23,634 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 21:11:23,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 352.4s TimeCoverageRelationStatistics Valid=176, Invalid=951, Unknown=63, NotChecked=0, Total=1190 [2022-11-20 21:11:23,636 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:11:23,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 431 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 35 Unchecked, 2.1s Time] [2022-11-20 21:11:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 21:11:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-11-20 21:11:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:11:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-11-20 21:11:23,656 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 14 [2022-11-20 21:11:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:11:23,657 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-11-20 21:11:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:11:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-11-20 21:11:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:11:23,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:11:23,659 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:11:23,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:11:23,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 21:11:24,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:11:24,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:11:24,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:11:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:11:24,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1825995883, now seen corresponding path program 1 times [2022-11-20 21:11:24,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:11:24,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597564839] [2022-11-20 21:11:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:11:24,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:11:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:11:24,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:11:24,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75dac77c-f2b4-4a5e-802d-697e06b85b12/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 21:11:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:11:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:11:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:13:19,068 WARN L233 SmtUtils]: Spent 10.39s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:13:36,494 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_41| (_ BitVec 8)) (|ULTIMATE.start_main1_~x~0#1| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_main1_~x~0#1|)) (.cse2 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_41|))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse2))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse0))))) (and (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32)) (not (bvslt .cse2 (_ bv0 32))) (not (bvsge .cse3 .cse1)) (not (bvslt .cse3 (_ bv0 32))))))))) is different from false [2022-11-20 21:13:38,518 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_41| (_ BitVec 8)) (|ULTIMATE.start_main1_~x~0#1| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_main1_~x~0#1|)) (.cse2 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_41|))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse2))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse0))))) (and (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32)) (not (bvslt .cse2 (_ bv0 32))) (not (bvsge .cse3 .cse1)) (not (bvslt .cse3 (_ bv0 32))))))))) is different from true [2022-11-20 21:13:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:13:38,519 INFO L328 TraceCheckSpWp]: Computing backward predicates...