./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/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_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/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_d0408312-03d3-4b96-8df8-b83b97403762/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 fac7e7835446ac69229cd712eb8181e46fef468b0e6881ccc6e306adaaef48bd --- 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 20:37:59,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:37:59,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:37:59,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:37:59,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:37:59,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:37:59,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:37:59,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:37:59,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:37:59,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:37:59,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:37:59,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:37:59,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:37:59,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:37:59,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:37:59,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:37:59,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:37:59,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:37:59,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:37:59,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:37:59,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:37:59,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:37:59,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:37:59,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:37:59,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:37:59,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:37:59,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:37:59,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:37:59,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:37:59,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:37:59,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:37:59,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:37:59,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:37:59,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:37:59,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:37:59,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:37:59,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:37:59,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:37:59,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:37:59,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:37:59,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:37:59,177 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:37:59,218 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:37:59,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:37:59,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:37:59,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:37:59,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:37:59,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:37:59,220 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:37:59,220 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:37:59,220 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:37:59,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:37:59,221 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:37:59,222 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:37:59,222 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:37:59,222 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:37:59,222 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:37:59,222 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:37:59,223 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:37:59,223 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:37:59,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:37:59,224 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:37:59,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:37:59,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:37:59,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:37:59,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:37:59,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:37:59,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:37:59,225 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:37:59,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:37:59,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:37:59,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:37:59,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:37:59,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:37:59,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:37:59,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:37:59,227 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:37:59,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:37:59,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:37:59,228 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:37:59,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:37:59,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:37:59,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:37:59,228 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_d0408312-03d3-4b96-8df8-b83b97403762/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fac7e7835446ac69229cd712eb8181e46fef468b0e6881ccc6e306adaaef48bd [2022-11-20 20:37:59,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:37:59,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:37:59,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:37:59,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:37:59,564 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:37:59,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i [2022-11-20 20:38:02,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:38:03,013 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:38:03,014 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i [2022-11-20 20:38:03,022 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/data/72b03e28a/c7709f825cff4f7d8b5cd11f8ba173fc/FLAGf50be0253 [2022-11-20 20:38:03,040 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/data/72b03e28a/c7709f825cff4f7d8b5cd11f8ba173fc [2022-11-20 20:38:03,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:38:03,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:38:03,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:38:03,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:38:03,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:38:03,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c5c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03, skipping insertion in model container [2022-11-20 20:38:03,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:38:03,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:38:03,229 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_d0408312-03d3-4b96-8df8-b83b97403762/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[1224,1237] [2022-11-20 20:38:03,253 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_d0408312-03d3-4b96-8df8-b83b97403762/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[2848,2861] [2022-11-20 20:38:03,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:38:03,265 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:38:03,279 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_d0408312-03d3-4b96-8df8-b83b97403762/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[1224,1237] [2022-11-20 20:38:03,289 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_d0408312-03d3-4b96-8df8-b83b97403762/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[2848,2861] [2022-11-20 20:38:03,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:38:03,305 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:38:03,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03 WrapperNode [2022-11-20 20:38:03,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:38:03,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:38:03,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:38:03,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:38:03,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,347 INFO L138 Inliner]: procedures = 27, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 85 [2022-11-20 20:38:03,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:38:03,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:38:03,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:38:03,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:38:03,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,390 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:38:03,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:38:03,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:38:03,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:38:03,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (1/1) ... [2022-11-20 20:38:03,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:38:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:03,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:38:03,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:38:03,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:38:03,465 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-20 20:38:03,465 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-20 20:38:03,466 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-20 20:38:03,466 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-20 20:38:03,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:38:03,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:38:03,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:38:03,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 20:38:03,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 20:38:03,542 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:38:03,544 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:38:03,747 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:38:03,896 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:38:03,897 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:38:03,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:38:03 BoogieIcfgContainer [2022-11-20 20:38:03,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:38:03,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:38:03,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:38:03,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:38:03,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:38:03" (1/3) ... [2022-11-20 20:38:03,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6899128b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:38:03, skipping insertion in model container [2022-11-20 20:38:03,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:03" (2/3) ... [2022-11-20 20:38:03,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6899128b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:38:03, skipping insertion in model container [2022-11-20 20:38:03,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:38:03" (3/3) ... [2022-11-20 20:38:03,910 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_3.i [2022-11-20 20:38:03,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:38:03,930 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 20:38:03,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:38:03,981 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;@672da6c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:38:03,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 20:38:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 20:38:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:38:03,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:03,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:03,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 259234294, now seen corresponding path program 1 times [2022-11-20 20:38:04,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:04,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620315875] [2022-11-20 20:38:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:04,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:04,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:38:04,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317062983] [2022-11-20 20:38:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:04,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:04,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:04,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:04,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:38:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:04,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:38:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:04,303 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 20:38:04,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:38:04,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:38:04,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620315875] [2022-11-20 20:38:04,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:38:04,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317062983] [2022-11-20 20:38:04,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317062983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:38:04,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:38:04,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:38:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635989423] [2022-11-20 20:38:04,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:38:04,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:38:04,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:38:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:38:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:38:04,371 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:04,425 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-11-20 20:38:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:38:04,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:38:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:04,436 INFO L225 Difference]: With dead ends: 56 [2022-11-20 20:38:04,436 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 20:38:04,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 20:38:04,443 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:04,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 63 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:38:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 20:38:04,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-11-20 20:38:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:38:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-20 20:38:04,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 8 [2022-11-20 20:38:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:04,491 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-20 20:38:04,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-20 20:38:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:38:04,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:04,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:04,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:38:04,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 20:38:04,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:04,710 INFO L85 PathProgramCache]: Analyzing trace with hash -659222671, now seen corresponding path program 1 times [2022-11-20 20:38:04,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:04,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045561405] [2022-11-20 20:38:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:04,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:04,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:38:04,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83121871] [2022-11-20 20:38:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:04,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:04,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:04,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:04,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:38:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:38:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:04,892 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 20:38:04,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:38:04,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:38:04,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045561405] [2022-11-20 20:38:04,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:38:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83121871] [2022-11-20 20:38:04,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83121871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:38:04,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:38:04,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:38:04,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743266232] [2022-11-20 20:38:04,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:38:04,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:38:04,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:38:04,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:38:04,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:38:04,907 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:04,939 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-20 20:38:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:38:04,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:38:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:04,942 INFO L225 Difference]: With dead ends: 41 [2022-11-20 20:38:04,942 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 20:38:04,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 20:38:04,946 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:04,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:38:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 20:38:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-20 20:38:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:38:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-20 20:38:04,961 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 9 [2022-11-20 20:38:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:04,962 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-20 20:38:04,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-20 20:38:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:38:04,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:04,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:04,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:38:05,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 20:38:05,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash -239223413, now seen corresponding path program 1 times [2022-11-20 20:38:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:05,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769014219] [2022-11-20 20:38:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:05,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:05,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:38:05,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635731971] [2022-11-20 20:38:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:05,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:05,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:05,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:38:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:38:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:05,398 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 20:38:05,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:05,463 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 20:38:05,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:38:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769014219] [2022-11-20 20:38:05,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:38:05,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635731971] [2022-11-20 20:38:05,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635731971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:38:05,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683602322] [2022-11-20 20:38:05,496 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 20:38:05,497 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:38:05,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:38:05,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:38:05,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:38:06,052 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-20 20:38:06,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:38:06,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '384#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:38:06,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:38:06,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:38:06,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-20 20:38:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346440803] [2022-11-20 20:38:06,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:38:06,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:38:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:38:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:38:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:38:06,608 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:06,698 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-11-20 20:38:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:38:06,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:38:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:06,701 INFO L225 Difference]: With dead ends: 43 [2022-11-20 20:38:06,701 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 20:38:06,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:38:06,708 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:06,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:38:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 20:38:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 20:38:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:38:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-20 20:38:06,721 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 10 [2022-11-20 20:38:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:06,722 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-20 20:38:06,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-20 20:38:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:38:06,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:06,724 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:06,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:38:06,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:06,930 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:06,931 INFO L85 PathProgramCache]: Analyzing trace with hash -211787189, now seen corresponding path program 2 times [2022-11-20 20:38:06,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:06,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442876539] [2022-11-20 20:38:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:06,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:06,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:38:06,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377599459] [2022-11-20 20:38:06,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:38:06,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:06,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:06,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:06,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:38:07,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:38:07,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:38:07,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:38:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:07,123 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 20:38:07,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:07,394 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 20:38:07,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:38:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442876539] [2022-11-20 20:38:07,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:38:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377599459] [2022-11-20 20:38:07,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377599459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:38:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1851546707] [2022-11-20 20:38:07,406 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 20:38:07,407 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:38:07,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:38:07,407 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:38:07,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:38:07,677 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-20 20:38:07,708 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:38:08,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:38:08,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:38:08,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:38:08,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-20 20:38:08,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034523890] [2022-11-20 20:38:08,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:38:08,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:38:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:38:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:38:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:38:08,205 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:08,343 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-11-20 20:38:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:38:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 20:38:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:08,346 INFO L225 Difference]: With dead ends: 44 [2022-11-20 20:38:08,346 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 20:38:08,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:38:08,349 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:08,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 156 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:38:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 20:38:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-20 20:38:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:38:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-20 20:38:08,364 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 12 [2022-11-20 20:38:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:08,364 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-20 20:38:08,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-20 20:38:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:38:08,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:08,366 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:08,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:38:08,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:08,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 746374641, now seen corresponding path program 3 times [2022-11-20 20:38:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:08,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340940713] [2022-11-20 20:38:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:08,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:38:08,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926154412] [2022-11-20 20:38:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:38:08,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:08,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:08,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:38:08,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:38:08,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:38:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:38:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:08,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:09,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:38:09,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340940713] [2022-11-20 20:38:09,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:38:09,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926154412] [2022-11-20 20:38:09,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926154412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:38:09,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061563794] [2022-11-20 20:38:09,095 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 20:38:09,096 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:38:09,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:38:09,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:38:09,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:38:09,277 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-20 20:38:09,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:38:09,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '798#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:38:09,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:38:09,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:38:09,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-20 20:38:09,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010372069] [2022-11-20 20:38:09,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:38:09,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:38:09,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:38:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:38:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:38:09,823 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:10,264 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-11-20 20:38:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:38:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:38:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:10,266 INFO L225 Difference]: With dead ends: 49 [2022-11-20 20:38:10,266 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 20:38:10,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:38:10,268 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:10,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 154 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:38:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 20:38:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-20 20:38:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:38:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-20 20:38:10,279 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 13 [2022-11-20 20:38:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:10,280 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-20 20:38:10,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-20 20:38:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:38:10,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:10,281 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:10,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:38:10,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:10,487 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash 384620299, now seen corresponding path program 4 times [2022-11-20 20:38:10,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:10,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42832247] [2022-11-20 20:38:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:10,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:10,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:38:10,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621147204] [2022-11-20 20:38:10,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:38:10,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:10,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:10,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:38:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 20:38:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:10,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:22,695 WARN L233 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:39:18,138 WARN L233 SmtUtils]: Spent 43.50s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:42:56,258 WARN L233 SmtUtils]: Spent 2.60m on a formula simplification that was a NOOP. DAG size: 141 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:43:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:43,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42832247] [2022-11-20 20:43:43,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:43:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621147204] [2022-11-20 20:43:43,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621147204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:43,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647080889] [2022-11-20 20:43:43,527 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 20:43:43,527 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:43,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:43,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:43,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:43,766 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-20 20:43:43,785 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:54,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1055#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:54,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:54,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:43:54,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-20 20:43:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047899157] [2022-11-20 20:43:54,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:54,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 20:43:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 20:43:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=740, Unknown=9, NotChecked=0, Total=870 [2022-11-20 20:43:54,099 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:56,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:43:58,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:44:00,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:44:02,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:44:05,175 WARN L539 Checker$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 20:44:08,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:44:10,646 WARN L539 Checker$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 20:44:12,652 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 20:44:12,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:12,807 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-11-20 20:44:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:44:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 20:44:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:12,815 INFO L225 Difference]: With dead ends: 53 [2022-11-20 20:44:12,815 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 20:44:12,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 240.5s TimeCoverageRelationStatistics Valid=152, Invalid=895, Unknown=9, NotChecked=0, Total=1056 [2022-11-20 20:44:12,818 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 32 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:12,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 245 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 204 Invalid, 5 Unknown, 0 Unchecked, 17.1s Time] [2022-11-20 20:44:12,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 20:44:12,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-20 20:44:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 20:44:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-20 20:44:12,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2022-11-20 20:44:12,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:12,835 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-20 20:44:12,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:12,836 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-20 20:44:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 20:44:12,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:12,837 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:12,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:13,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:13,038 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:44:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1742833996, now seen corresponding path program 1 times [2022-11-20 20:44:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:44:13,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998373911] [2022-11-20 20:44:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:13,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:44:13,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:44:13,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113802414] [2022-11-20 20:44:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:13,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:13,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:44:13,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:44:13,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:44:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:13,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 20:44:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:13,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:58,809 WARN L233 SmtUtils]: Spent 19.61s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:51:58,851 WARN L233 SmtUtils]: Spent 6.11m on a formula simplification. DAG size of input: 138 DAG size of output: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:53:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:53:14,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:53:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998373911] [2022-11-20 20:53:14,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:53:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113802414] [2022-11-20 20:53:14,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113802414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541464057] [2022-11-20 20:53:14,343 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 20:53:14,343 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:53:14,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:53:14,344 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:53:14,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:53:14,581 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2022-11-20 20:53:14,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:53:26,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1336#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:53:26,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:53:26,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:53:26,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-20 20:53:26,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118207821] [2022-11-20 20:53:26,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:53:26,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 20:53:26,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:53:26,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 20:53:26,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=847, Unknown=6, NotChecked=0, Total=992 [2022-11-20 20:53:26,317 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 22 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:53:28,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:53:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:29,748 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-20 20:53:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:53:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-11-20 20:53:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:29,749 INFO L225 Difference]: With dead ends: 36 [2022-11-20 20:53:29,749 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 20:53:29,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 423.0s TimeCoverageRelationStatistics Valid=171, Invalid=1013, Unknown=6, NotChecked=0, Total=1190 [2022-11-20 20:53:29,751 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:29,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 300 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 20:53:29,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 20:53:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-20 20:53:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:53:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-20 20:53:29,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 19 [2022-11-20 20:53:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:29,755 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-20 20:53:29,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:53:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-20 20:53:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 20:53:29,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:29,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:29,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:29,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 20:53:29,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:53:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:29,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1049715433, now seen corresponding path program 1 times [2022-11-20 20:53:29,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:53:29,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044307132] [2022-11-20 20:53:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:29,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:53:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:53:29,992 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:53:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:53:30,055 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:53:30,055 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:53:30,057 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-20 20:53:30,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 20:53:30,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:53:30,063 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2022-11-20 20:53:30,068 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 20:53:30,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:53:30 BoogieIcfgContainer [2022-11-20 20:53:30,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 20:53:30,105 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 20:53:30,105 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 20:53:30,105 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 20:53:30,106 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:38:03" (3/4) ... [2022-11-20 20:53:30,110 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 20:53:30,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 20:53:30,111 INFO L158 Benchmark]: Toolchain (without parser) took 927065.20ms. Allocated memory was 161.5MB in the beginning and 239.1MB in the end (delta: 77.6MB). Free memory was 131.6MB in the beginning and 174.1MB in the end (delta: -42.5MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2022-11-20 20:53:30,111 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:53:30,112 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.16ms. Allocated memory is still 161.5MB. Free memory was 131.2MB in the beginning and 119.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 20:53:30,112 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.93ms. Allocated memory is still 161.5MB. Free memory was 119.7MB in the beginning and 118.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:53:30,113 INFO L158 Benchmark]: Boogie Preprocessor took 43.56ms. Allocated memory is still 161.5MB. Free memory was 118.0MB in the beginning and 116.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:53:30,113 INFO L158 Benchmark]: RCFGBuilder took 506.49ms. Allocated memory is still 161.5MB. Free memory was 116.6MB in the beginning and 101.2MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-20 20:53:30,114 INFO L158 Benchmark]: TraceAbstraction took 926201.23ms. Allocated memory was 161.5MB in the beginning and 239.1MB in the end (delta: 77.6MB). Free memory was 100.5MB in the beginning and 174.1MB in the end (delta: -73.6MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2022-11-20 20:53:30,114 INFO L158 Benchmark]: Witness Printer took 5.56ms. Allocated memory is still 239.1MB. Free memory is still 174.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:53:30,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.16ms. Allocated memory is still 161.5MB. Free memory was 131.2MB in the beginning and 119.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.93ms. Allocated memory is still 161.5MB. Free memory was 119.7MB in the beginning and 118.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.56ms. Allocated memory is still 161.5MB. Free memory was 118.0MB in the beginning and 116.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 506.49ms. Allocated memory is still 161.5MB. Free memory was 116.6MB in the beginning and 101.2MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 926201.23ms. Allocated memory was 161.5MB in the beginning and 239.1MB in the end (delta: 77.6MB). Free memory was 100.5MB in the beginning and 174.1MB in the end (delta: -73.6MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. * Witness Printer took 5.56ms. Allocated memory is still 239.1MB. Free memory is still 174.1MB. 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: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L82] COND FALSE !(!cond) [L98] RET assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L100] CALL, EXPR f(IN) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L100] RET, EXPR f(IN) VAL [f(IN)=109, IN=111] [L100] CALL, EXPR fp(IN) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L100] RET, EXPR fp(IN) VAL [f(IN)=109, fp(IN)=113, IN=111] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=112] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L102] RET, EXPR f(x) VAL [f(x)=110, IN=111, x=112] [L102] CALL, EXPR fp(x) VAL [\old(x)=112] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L102] RET, EXPR fp(x) VAL [f(x)=110, fp(x)=116, IN=111, x=112] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=115] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L104] RET, EXPR f(x) VAL [f(x)=117, IN=111, x=115] [L104] CALL, EXPR fp(x) VAL [\old(x)=115] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L104] RET, EXPR fp(x) VAL [f(x)=117, fp(x)=114, IN=111, x=115] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=111] [L109] reach_error() VAL [IN=111] - UnprovableResult [Line: 27]: 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 4 procedures, 34 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 926.1s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 23.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 20.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 1080 SdHoareTripleChecker+Invalid, 20.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 887 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 576 IncrementalHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 193 mSDtfsCounter, 576 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 665.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 875.3s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 2924 SizeOfPredicates, 33 NumberOfNonLiveVariables, 548 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 4/98 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 [2022-11-20 20:53:30,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/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_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/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_d0408312-03d3-4b96-8df8-b83b97403762/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 fac7e7835446ac69229cd712eb8181e46fef468b0e6881ccc6e306adaaef48bd --- 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 20:53:32,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:53:32,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:53:32,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:53:32,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:53:32,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:53:32,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:53:32,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:53:32,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:53:32,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:53:32,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:53:32,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:53:32,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:53:32,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:53:32,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:53:32,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:53:32,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:53:32,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:53:32,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:53:32,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:53:32,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:53:32,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:53:32,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:53:32,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:53:32,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:53:32,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:53:32,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:53:32,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:53:32,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:53:32,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:53:32,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:53:32,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:53:32,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:53:32,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:53:32,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:53:32,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:53:32,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:53:32,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:53:32,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:53:32,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:53:32,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:53:32,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-20 20:53:32,892 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:53:32,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:53:32,893 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:53:32,893 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:53:32,894 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:53:32,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:53:32,895 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:53:32,896 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:53:32,896 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:53:32,896 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:53:32,897 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:53:32,897 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:53:32,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:53:32,899 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:53:32,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:53:32,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:53:32,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:53:32,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:53:32,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:53:32,902 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:53:32,902 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:53:32,903 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:53:32,903 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:53:32,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:53:32,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:53:32,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:53:32,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:53:32,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:53:32,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:53:32,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:53:32,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:53:32,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:53:32,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:53:32,907 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:53:32,908 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:53:32,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:53:32,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:53:32,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:53:32,909 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_d0408312-03d3-4b96-8df8-b83b97403762/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fac7e7835446ac69229cd712eb8181e46fef468b0e6881ccc6e306adaaef48bd [2022-11-20 20:53:33,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:53:33,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:53:33,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:53:33,446 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:53:33,447 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:53:33,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0408312-03d3-4b96-8df8-b83b97403762/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i