./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7 --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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:30:54,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:30:54,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:30:54,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:30:54,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:30:54,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:30:54,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:30:54,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:30:54,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:30:54,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:30:54,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:30:54,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:30:54,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:30:54,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:30:54,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:30:54,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:30:54,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:30:54,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:30:54,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:30:54,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:30:54,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:30:54,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:30:54,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:30:54,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:30:54,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:30:54,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:30:54,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:30:54,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:30:54,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:30:54,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:30:54,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:30:54,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:30:54,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:30:54,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:30:54,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:30:54,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:30:54,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:30:54,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:30:54,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:30:54,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:30:54,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:30:54,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:30:54,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:30:54,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:30:54,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:30:54,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:30:54,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:30:54,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:30:54,316 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:30:54,317 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:30:54,317 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:30:54,317 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:30:54,318 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:30:54,318 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:30:54,319 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:30:54,319 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:30:54,319 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:30:54,319 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:30:54,319 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:30:54,320 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:30:54,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:30:54,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:30:54,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:30:54,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:30:54,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:30:54,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:30:54,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:30:54,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:30:54,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:30:54,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:30:54,324 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:30:54,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:30:54,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:30:54,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:30:54,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:30:54,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:30:54,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:30:54,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:30:54,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:30:54,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:30:54,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:30:54,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:30:54,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:30:54,327 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2021-11-25 20:30:54,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:30:54,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:30:54,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:30:54,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:30:54,622 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:30:54,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2021-11-25 20:30:54,686 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data/c6214e71c/e7c7fbcb116d4851b031e51de680e569/FLAG951848e7c [2021-11-25 20:30:55,162 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:30:55,162 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2021-11-25 20:30:55,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data/c6214e71c/e7c7fbcb116d4851b031e51de680e569/FLAG951848e7c [2021-11-25 20:30:55,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data/c6214e71c/e7c7fbcb116d4851b031e51de680e569 [2021-11-25 20:30:55,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:30:55,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:30:55,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:30:55,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:30:55,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:30:55,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6468dddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55, skipping insertion in model container [2021-11-25 20:30:55,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:30:55,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:30:55,741 WARN L230 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_607f305a-d43b-4cfa-8918-bfe462f3eb37/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2021-11-25 20:30:55,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:30:55,802 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:30:55,818 WARN L230 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_607f305a-d43b-4cfa-8918-bfe462f3eb37/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2021-11-25 20:30:55,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:30:55,871 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:30:55,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55 WrapperNode [2021-11-25 20:30:55,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:30:55,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:30:55,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:30:55,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:30:55,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,972 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2021-11-25 20:30:55,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:30:55,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:30:55,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:30:55,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:30:55,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:56,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:56,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:30:56,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:30:56,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:30:56,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:30:56,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:56,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:30:56,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:30:56,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:30:56,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:30:56,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:30:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:30:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 20:30:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 20:30:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:30:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:30:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:30:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:30:56,151 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:30:56,152 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:30:56,407 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:30:56,605 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:30:56,605 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:30:56,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:30:56 BoogieIcfgContainer [2021-11-25 20:30:56,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:30:56,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:30:56,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:30:56,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:30:56,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:30:55" (1/3) ... [2021-11-25 20:30:56,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b82fd43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:30:56, skipping insertion in model container [2021-11-25 20:30:56,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55" (2/3) ... [2021-11-25 20:30:56,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b82fd43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:30:56, skipping insertion in model container [2021-11-25 20:30:56,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:30:56" (3/3) ... [2021-11-25 20:30:56,616 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2021-11-25 20:30:56,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:30:56,622 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:30:56,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:30:56,677 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:30:56,677 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:30:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 37 states have internal predecessors, (52), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 20:30:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:30:56,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:56,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:56,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1511064706, now seen corresponding path program 1 times [2021-11-25 20:30:56,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:56,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899397413] [2021-11-25 20:30:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:56,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:30:57,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:57,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899397413] [2021-11-25 20:30:57,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899397413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:57,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:30:57,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110460536] [2021-11-25 20:30:57,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:57,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:30:57,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:57,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:30:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:30:57,335 INFO L87 Difference]: Start difference. First operand has 47 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 37 states have internal predecessors, (52), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:30:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:57,582 INFO L93 Difference]: Finished difference Result 133 states and 221 transitions. [2021-11-25 20:30:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:30:57,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-25 20:30:57,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:57,595 INFO L225 Difference]: With dead ends: 133 [2021-11-25 20:30:57,596 INFO L226 Difference]: Without dead ends: 82 [2021-11-25 20:30:57,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:30:57,603 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 51 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:57,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 508 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:30:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-25 20:30:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2021-11-25 20:30:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 39 states have internal predecessors, (51), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2021-11-25 20:30:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 74 transitions. [2021-11-25 20:30:57,653 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 74 transitions. Word has length 24 [2021-11-25 20:30:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:57,653 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 74 transitions. [2021-11-25 20:30:57,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:30:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 74 transitions. [2021-11-25 20:30:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 20:30:57,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:57,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:57,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:30:57,658 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash 105677899, now seen corresponding path program 1 times [2021-11-25 20:30:57,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:57,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479674950] [2021-11-25 20:30:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:57,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:30:57,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479674950] [2021-11-25 20:30:57,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479674950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:30:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599000553] [2021-11-25 20:30:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:57,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:30:57,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:30:57,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:30:57,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:30:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-25 20:30:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:30:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:30:58,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:30:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:30:58,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599000553] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:30:58,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:30:58,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 15] total 24 [2021-11-25 20:30:58,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122181060] [2021-11-25 20:30:58,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:58,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:30:58,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:30:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:30:58,754 INFO L87 Difference]: Start difference. First operand 51 states and 74 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:30:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:59,026 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2021-11-25 20:30:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:30:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2021-11-25 20:30:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:59,029 INFO L225 Difference]: With dead ends: 71 [2021-11-25 20:30:59,029 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 20:30:59,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:30:59,031 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 59 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:59,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 342 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:30:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 20:30:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2021-11-25 20:30:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.372093023255814) internal successors, (59), 46 states have internal predecessors, (59), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-25 20:30:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2021-11-25 20:30:59,045 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 27 [2021-11-25 20:30:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:59,045 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2021-11-25 20:30:59,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:30:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2021-11-25 20:30:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:30:59,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:59,048 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:59,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:30:59,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 20:30:59,262 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1837782345, now seen corresponding path program 1 times [2021-11-25 20:30:59,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:59,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267190719] [2021-11-25 20:30:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:59,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:30:59,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:59,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267190719] [2021-11-25 20:30:59,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267190719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:59,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:59,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 20:30:59,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197572290] [2021-11-25 20:30:59,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:59,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:30:59,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:59,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:30:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:30:59,678 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:30:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:59,947 INFO L93 Difference]: Finished difference Result 100 states and 144 transitions. [2021-11-25 20:30:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:30:59,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-11-25 20:30:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:59,951 INFO L225 Difference]: With dead ends: 100 [2021-11-25 20:30:59,951 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 20:30:59,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:30:59,953 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 56 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:59,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 626 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:30:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 20:30:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2021-11-25 20:30:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 51 states have internal predecessors, (63), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-25 20:30:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2021-11-25 20:30:59,981 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 28 [2021-11-25 20:30:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:59,982 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2021-11-25 20:30:59,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:30:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2021-11-25 20:30:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:30:59,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:59,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:59,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:30:59,989 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash 8886071, now seen corresponding path program 1 times [2021-11-25 20:30:59,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:59,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034782589] [2021-11-25 20:30:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:59,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:00,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034782589] [2021-11-25 20:31:00,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034782589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733188941] [2021-11-25 20:31:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:00,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:00,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:00,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:31:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:00,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:31:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:31:00,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:00,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733188941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:31:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961528207] [2021-11-25 20:31:00,748 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 20:31:00,749 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:31:00,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:31:00,758 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:31:00,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:31:02,683 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2021-11-25 20:31:03,794 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2021-11-25 20:31:03,908 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:31:16,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1111#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| Int) (|aux_div_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| Int) (|aux_div_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61| Int) (|aux_mod_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| Int) (|aux_div_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| Int)) (and (< |aux_mod_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| 4294967296) (< (+ |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72|)) 4294967296) (< |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| 4294967296) (< |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| |aux_mod_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61|) (<= 0 |aux_mod_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61|) (not (= (+ |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72|)) 0)) (= |__VERIFIER_assert_#in~cond| (ite (<= (ite (<= (mod (div (+ (* |aux_div_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| 4294967296) (* |aux_div_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61| 4294967296) |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72|) 16777216) 4294967296) 2147483647) (mod (div (+ (* |aux_div_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| 4294967296) (* |aux_div_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61| 4294967296) |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72|) 16777216) 4294967296) (+ (mod (div (+ (* |aux_div_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| 4294967296) (* |aux_div_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61| 4294967296) |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72|) 16777216) 4294967296) (- 4294967296))) (ite (<= (mod (div (+ |aux_mod_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| (* |aux_div_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| 4294967296)) 16777216) 4294967296) 2147483647) (mod (div (+ |aux_mod_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| (* |aux_div_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| 4294967296)) 16777216) 4294967296) (+ (- 4294967296) (mod (div (+ |aux_mod_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| (* |aux_div_v_ULTIMATE.start_addflt_~a#1_BEFORE_CALL_1_61| 4294967296)) 16777216) 4294967296)))) 1 0)) (or (and (= (+ (* 4294967296 |aux_div_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61|) |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72|)) 0) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))) (<= 0 (+ |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72| (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72|))) (<= 0 |aux_mod_aux_mod_v_ULTIMATE.start_addflt_~b#1_BEFORE_CALL_1_61_72|))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:31:16,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:31:16,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:31:16,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 14 [2021-11-25 20:31:16,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395479122] [2021-11-25 20:31:16,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:31:16,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:31:16,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:16,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:31:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=891, Unknown=1, NotChecked=0, Total=992 [2021-11-25 20:31:16,550 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 20:31:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:16,978 INFO L93 Difference]: Finished difference Result 166 states and 239 transitions. [2021-11-25 20:31:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:31:16,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2021-11-25 20:31:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:16,981 INFO L225 Difference]: With dead ends: 166 [2021-11-25 20:31:16,981 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 20:31:16,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=151, Invalid=1330, Unknown=1, NotChecked=0, Total=1482 [2021-11-25 20:31:16,984 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 58 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:16,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 546 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:31:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 20:31:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2021-11-25 20:31:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 55 states have internal predecessors, (68), 13 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-25 20:31:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2021-11-25 20:31:16,997 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 28 [2021-11-25 20:31:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:16,997 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2021-11-25 20:31:16,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 20:31:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2021-11-25 20:31:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 20:31:16,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:17,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:17,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:17,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:17,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash 602337315, now seen corresponding path program 1 times [2021-11-25 20:31:17,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:17,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565199025] [2021-11-25 20:31:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:17,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:17,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565199025] [2021-11-25 20:31:17,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565199025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856280204] [2021-11-25 20:31:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:17,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:17,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:17,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:17,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:31:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:31:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:31:17,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:17,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856280204] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:17,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:31:17,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 11] total 19 [2021-11-25 20:31:17,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330199952] [2021-11-25 20:31:17,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:17,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:31:17,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:17,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:31:17,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:31:17,805 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:31:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:17,938 INFO L93 Difference]: Finished difference Result 93 states and 125 transitions. [2021-11-25 20:31:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:31:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2021-11-25 20:31:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:17,940 INFO L225 Difference]: With dead ends: 93 [2021-11-25 20:31:17,940 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 20:31:17,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:31:17,942 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:17,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 479 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:17,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 20:31:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-11-25 20:31:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 58 states have internal predecessors, (73), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-25 20:31:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2021-11-25 20:31:17,952 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 33 [2021-11-25 20:31:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:17,952 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2021-11-25 20:31:17,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:31:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2021-11-25 20:31:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 20:31:17,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:17,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:17,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:18,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:18,170 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:18,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:18,170 INFO L85 PathProgramCache]: Analyzing trace with hash 558488300, now seen corresponding path program 1 times [2021-11-25 20:31:18,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:18,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943756583] [2021-11-25 20:31:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:18,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:18,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:18,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943756583] [2021-11-25 20:31:18,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943756583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:18,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51550011] [2021-11-25 20:31:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:18,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:18,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:18,773 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:18,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:31:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 20:31:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:31:19,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:20,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51550011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:31:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915428991] [2021-11-25 20:31:20,094 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 20:31:20,094 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:31:20,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:31:20,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:31:20,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:31:20,490 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 20:31:20,788 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 20:31:23,735 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 20:31:24,514 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2021-11-25 20:31:24,531 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2021-11-25 20:31:24,635 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:31:31,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2141#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:31:31,247 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:31:31,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:31:31,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 34 [2021-11-25 20:31:31,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869985706] [2021-11-25 20:31:31,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:31:31,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 20:31:31,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 20:31:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2784, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 20:31:31,251 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 34 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-25 20:31:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:33,140 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2021-11-25 20:31:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 20:31:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 32 [2021-11-25 20:31:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:33,143 INFO L225 Difference]: With dead ends: 115 [2021-11-25 20:31:33,143 INFO L226 Difference]: Without dead ends: 101 [2021-11-25 20:31:33,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=359, Invalid=4333, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 20:31:33,147 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 208 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:33,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1177 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:31:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-25 20:31:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2021-11-25 20:31:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.305084745762712) internal successors, (77), 63 states have internal predecessors, (77), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-25 20:31:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 109 transitions. [2021-11-25 20:31:33,159 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 109 transitions. Word has length 32 [2021-11-25 20:31:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:33,159 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 109 transitions. [2021-11-25 20:31:33,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-25 20:31:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 109 transitions. [2021-11-25 20:31:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 20:31:33,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:33,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:33,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:33,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:33,378 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1816153812, now seen corresponding path program 2 times [2021-11-25 20:31:33,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:33,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487746344] [2021-11-25 20:31:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:33,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:33,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:33,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487746344] [2021-11-25 20:31:33,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487746344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:33,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186482236] [2021-11-25 20:31:33,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:31:33,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:33,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:33,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:33,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:31:33,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 20:31:33,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:31:33,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:31:33,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:31:34,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:34,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186482236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:34,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:34,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 18 [2021-11-25 20:31:34,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684469955] [2021-11-25 20:31:34,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:34,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:31:34,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:31:34,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:31:34,111 INFO L87 Difference]: Start difference. First operand 81 states and 109 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:34,325 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2021-11-25 20:31:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:31:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-25 20:31:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:34,327 INFO L225 Difference]: With dead ends: 97 [2021-11-25 20:31:34,327 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 20:31:34,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:31:34,328 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 53 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:34,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 347 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 20:31:34,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2021-11-25 20:31:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.32) internal successors, (66), 54 states have internal predecessors, (66), 13 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-25 20:31:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2021-11-25 20:31:34,337 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 32 [2021-11-25 20:31:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:34,337 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2021-11-25 20:31:34,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2021-11-25 20:31:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 20:31:34,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:34,339 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:34,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:34,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:34,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash 30514604, now seen corresponding path program 2 times [2021-11-25 20:31:34,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:34,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950049931] [2021-11-25 20:31:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:34,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:31:34,591 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:31:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:31:34,639 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 20:31:34,639 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:31:34,640 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:31:34,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:31:34,645 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2021-11-25 20:31:34,648 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:31:34,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:31:34 BoogieIcfgContainer [2021-11-25 20:31:34,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:31:34,682 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:31:34,682 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:31:34,682 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:31:34,683 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:30:56" (3/4) ... [2021-11-25 20:31:34,686 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:31:34,686 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:31:34,687 INFO L158 Benchmark]: Toolchain (without parser) took 39138.29ms. Allocated memory was 100.7MB in the beginning and 287.3MB in the end (delta: 186.6MB). Free memory was 63.0MB in the beginning and 114.4MB in the end (delta: -51.4MB). Peak memory consumption was 137.4MB. Max. memory is 16.1GB. [2021-11-25 20:31:34,687 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory was 80.0MB in the beginning and 80.0MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:31:34,687 INFO L158 Benchmark]: CACSL2BoogieTranslator took 318.97ms. Allocated memory is still 100.7MB. Free memory was 62.8MB in the beginning and 49.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 20:31:34,688 INFO L158 Benchmark]: Boogie Procedure Inliner took 99.64ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 49.6MB in the beginning and 104.8MB in the end (delta: -55.2MB). Peak memory consumption was 3.4MB. Max. memory is 16.1GB. [2021-11-25 20:31:34,688 INFO L158 Benchmark]: Boogie Preprocessor took 29.49ms. Allocated memory is still 127.9MB. Free memory was 104.8MB in the beginning and 103.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:31:34,688 INFO L158 Benchmark]: RCFGBuilder took 604.37ms. Allocated memory is still 127.9MB. Free memory was 103.2MB in the beginning and 82.3MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-25 20:31:34,689 INFO L158 Benchmark]: TraceAbstraction took 38071.05ms. Allocated memory was 127.9MB in the beginning and 287.3MB in the end (delta: 159.4MB). Free memory was 81.8MB in the beginning and 115.5MB in the end (delta: -33.7MB). Peak memory consumption was 127.7MB. Max. memory is 16.1GB. [2021-11-25 20:31:34,689 INFO L158 Benchmark]: Witness Printer took 4.20ms. Allocated memory is still 287.3MB. Free memory was 115.5MB in the beginning and 114.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:31:34,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory was 80.0MB in the beginning and 80.0MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 318.97ms. Allocated memory is still 100.7MB. Free memory was 62.8MB in the beginning and 49.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 99.64ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 49.6MB in the beginning and 104.8MB in the end (delta: -55.2MB). Peak memory consumption was 3.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.49ms. Allocated memory is still 127.9MB. Free memory was 104.8MB in the beginning and 103.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 604.37ms. Allocated memory is still 127.9MB. Free memory was 103.2MB in the beginning and 82.3MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 38071.05ms. Allocated memory was 127.9MB in the beginning and 287.3MB in the end (delta: 159.4MB). Free memory was 81.8MB in the beginning and 115.5MB in the end (delta: -33.7MB). Peak memory consumption was 127.7MB. Max. memory is 16.1GB. * Witness Printer took 4.20ms. Allocated memory is still 287.3MB. Free memory was 115.5MB in the beginning and 114.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 108. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; VAL [ea=0, eb=0] [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=0, eb=0] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=4294967295, e=0, res=4294967295] [L80] return (__retres4); [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=36028801313931263, ea=0, eb=0, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=1, e=0, res=1] [L80] return (__retres4); [L253] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=36028801313931265, ea=0, eb=0, ma=16777216, mb=16777216, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) [L258] COND TRUE a > zero [L259] tmp = 1 [L263] sa = tmp [L265] COND FALSE !(b < zero) [L268] COND TRUE b > zero [L269] tmp___0 = 1 [L273] sb = tmp___0 [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; [L94] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, tmp=1] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, ea=-2147483521, eb=-2147483520, tmp=1] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38.0s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 536 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 502 mSDsluCounter, 4025 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3776 mSDsCounter, 99 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1747 IncrementalHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 99 mSolverCounterUnsat, 425 mSDtfsCounter, 1747 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 449 GetRequests, 250 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 22.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=6, InterpolantAutomatonStates: 87, 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, 132 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 388 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 460 ConstructedInterpolants, 0 QuantifiedInterpolants, 1872 SizeOfPredicates, 67 NumberOfNonLiveVariables, 552 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 152/198 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 [2021-11-25 20:31:34,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7 --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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:31:36,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:31:36,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:31:37,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:31:37,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:31:37,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:31:37,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:31:37,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:31:37,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:31:37,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:31:37,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:31:37,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:31:37,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:31:37,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:31:37,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:31:37,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:31:37,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:31:37,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:31:37,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:31:37,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:31:37,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:31:37,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:31:37,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:31:37,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:31:37,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:31:37,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:31:37,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:31:37,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:31:37,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:31:37,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:31:37,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:31:37,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:31:37,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:31:37,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:31:37,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:31:37,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:31:37,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:31:37,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:31:37,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:31:37,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:31:37,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:31:37,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 20:31:37,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:31:37,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:31:37,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:31:37,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:31:37,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:31:37,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:31:37,143 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:31:37,143 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:31:37,143 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:31:37,143 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:31:37,144 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:31:37,145 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:31:37,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:31:37,146 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:31:37,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:31:37,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:31:37,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:31:37,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:31:37,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:31:37,148 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:31:37,148 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:31:37,148 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:31:37,148 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:31:37,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:31:37,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:31:37,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:31:37,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:31:37,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:31:37,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:31:37,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:37,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:31:37,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:31:37,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:31:37,151 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:31:37,152 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:31:37,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:31:37,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:31:37,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:31:37,153 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_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2021-11-25 20:31:37,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:31:37,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:31:37,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:31:37,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:31:37,601 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:31:37,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2021-11-25 20:31:37,678 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data/b8223c335/3b2ef77743804b159e63746ad9d34647/FLAGd127f8a00 [2021-11-25 20:31:38,178 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:31:38,178 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2021-11-25 20:31:38,190 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data/b8223c335/3b2ef77743804b159e63746ad9d34647/FLAGd127f8a00 [2021-11-25 20:31:38,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/data/b8223c335/3b2ef77743804b159e63746ad9d34647 [2021-11-25 20:31:38,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:31:38,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:31:38,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:31:38,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:31:38,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:31:38,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3023a778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38, skipping insertion in model container [2021-11-25 20:31:38,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:31:38,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:31:38,773 WARN L230 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_607f305a-d43b-4cfa-8918-bfe462f3eb37/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2021-11-25 20:31:38,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:31:38,865 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:31:38,876 WARN L230 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_607f305a-d43b-4cfa-8918-bfe462f3eb37/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2021-11-25 20:31:38,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:31:38,924 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:31:38,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38 WrapperNode [2021-11-25 20:31:38,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:31:38,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:38,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:31:38,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:31:38,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,966 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 145 [2021-11-25 20:31:38,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:38,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:31:38,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:31:38,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:31:38,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:38,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:39,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:31:39,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:31:39,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:31:39,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:31:39,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (1/1) ... [2021-11-25 20:31:39,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:39,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:39,031 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:31:39,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:31:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:31:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:31:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 20:31:39,081 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 20:31:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:31:39,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:31:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:31:39,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:31:39,157 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:31:39,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:31:39,463 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:31:39,491 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:31:39,505 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:31:39,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:39 BoogieIcfgContainer [2021-11-25 20:31:39,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:31:39,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:31:39,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:31:39,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:31:39,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:31:38" (1/3) ... [2021-11-25 20:31:39,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604e18e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:39, skipping insertion in model container [2021-11-25 20:31:39,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:38" (2/3) ... [2021-11-25 20:31:39,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604e18e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:39, skipping insertion in model container [2021-11-25 20:31:39,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:39" (3/3) ... [2021-11-25 20:31:39,516 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2021-11-25 20:31:39,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:31:39,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:31:39,570 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:31:39,577 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:31:39,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:31:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 20:31:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 20:31:39,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:39,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:39,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1607439287, now seen corresponding path program 1 times [2021-11-25 20:31:39,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:39,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445640791] [2021-11-25 20:31:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:39,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:39,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:39,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:31:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:39,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:31:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:39,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:40,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:40,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445640791] [2021-11-25 20:31:40,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445640791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:31:40,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [329192566] [2021-11-25 20:31:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:40,119 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:31:40,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:31:40,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:31:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2021-11-25 20:31:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:40,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:31:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:40,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:40,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [329192566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:31:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439336940] [2021-11-25 20:31:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:40,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:40,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:40,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:40,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:31:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:31:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:40,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:40,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439336940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:31:40,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:31:40,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2021-11-25 20:31:40,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105444221] [2021-11-25 20:31:40,708 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:31:40,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:31:40,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:31:40,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:31:40,753 INFO L87 Difference]: Start difference. First operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 20:31:41,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:41,444 INFO L93 Difference]: Finished difference Result 380 states and 643 transitions. [2021-11-25 20:31:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:31:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2021-11-25 20:31:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:41,460 INFO L225 Difference]: With dead ends: 380 [2021-11-25 20:31:41,460 INFO L226 Difference]: Without dead ends: 279 [2021-11-25 20:31:41,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:31:41,468 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 309 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:41,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1717 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:31:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-25 20:31:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 112. [2021-11-25 20:31:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 94 states have internal predecessors, (133), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (21), 17 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-25 20:31:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 169 transitions. [2021-11-25 20:31:41,535 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 169 transitions. Word has length 32 [2021-11-25 20:31:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:41,535 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 169 transitions. [2021-11-25 20:31:41,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 20:31:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 169 transitions. [2021-11-25 20:31:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 20:31:41,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:41,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:41,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:41,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:41,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:42,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:42,143 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:42,144 INFO L85 PathProgramCache]: Analyzing trace with hash 125469278, now seen corresponding path program 1 times [2021-11-25 20:31:42,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:42,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692990227] [2021-11-25 20:31:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:42,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:42,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:42,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:42,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 20:31:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:31:42,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:42,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:42,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:42,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692990227] [2021-11-25 20:31:42,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692990227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:42,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:42,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:31:42,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199686040] [2021-11-25 20:31:42,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:42,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:31:42,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:31:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:42,313 INFO L87 Difference]: Start difference. First operand 112 states and 169 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:42,439 INFO L93 Difference]: Finished difference Result 248 states and 376 transitions. [2021-11-25 20:31:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:31:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-11-25 20:31:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:42,450 INFO L225 Difference]: With dead ends: 248 [2021-11-25 20:31:42,450 INFO L226 Difference]: Without dead ends: 187 [2021-11-25 20:31:42,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:42,458 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 52 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:42,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 460 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-25 20:31:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-11-25 20:31:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 157 states have (on average 1.4203821656050954) internal successors, (223), 156 states have internal predecessors, (223), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2021-11-25 20:31:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 273 transitions. [2021-11-25 20:31:42,513 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 273 transitions. Word has length 40 [2021-11-25 20:31:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:42,514 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 273 transitions. [2021-11-25 20:31:42,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 273 transitions. [2021-11-25 20:31:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 20:31:42,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:42,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:42,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:42,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:42,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash 805527648, now seen corresponding path program 1 times [2021-11-25 20:31:42,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:42,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187154843] [2021-11-25 20:31:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:42,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:42,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:42,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 20:31:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:42,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:31:42,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:42,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:42,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:42,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187154843] [2021-11-25 20:31:42,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187154843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:42,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:42,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:31:42,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351850677] [2021-11-25 20:31:42,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:42,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:31:42,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:31:42,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:42,936 INFO L87 Difference]: Start difference. First operand 183 states and 273 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:43,066 INFO L93 Difference]: Finished difference Result 256 states and 383 transitions. [2021-11-25 20:31:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:31:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-11-25 20:31:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:43,069 INFO L225 Difference]: With dead ends: 256 [2021-11-25 20:31:43,069 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 20:31:43,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:31:43,075 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:43,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 542 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 20:31:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2021-11-25 20:31:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 150 states have internal predecessors, (211), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-25 20:31:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 255 transitions. [2021-11-25 20:31:43,114 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 255 transitions. Word has length 40 [2021-11-25 20:31:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:43,117 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 255 transitions. [2021-11-25 20:31:43,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 255 transitions. [2021-11-25 20:31:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 20:31:43,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:43,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:43,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:43,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:43,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:43,343 INFO L85 PathProgramCache]: Analyzing trace with hash 339137576, now seen corresponding path program 1 times [2021-11-25 20:31:43,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:43,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571056654] [2021-11-25 20:31:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:43,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:43,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:43,346 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:43,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:31:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:31:43,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:43,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571056654] [2021-11-25 20:31:43,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571056654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:43,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:43,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:31:43,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160434896] [2021-11-25 20:31:43,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:43,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:43,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:43,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:43,497 INFO L87 Difference]: Start difference. First operand 174 states and 255 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:43,541 INFO L93 Difference]: Finished difference Result 321 states and 477 transitions. [2021-11-25 20:31:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-11-25 20:31:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:43,545 INFO L225 Difference]: With dead ends: 321 [2021-11-25 20:31:43,545 INFO L226 Difference]: Without dead ends: 255 [2021-11-25 20:31:43,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:43,547 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 66 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:43,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 329 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:31:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-25 20:31:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2021-11-25 20:31:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 197 states have (on average 1.3553299492385786) internal successors, (267), 196 states have internal predecessors, (267), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2021-11-25 20:31:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 317 transitions. [2021-11-25 20:31:43,566 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 317 transitions. Word has length 43 [2021-11-25 20:31:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:43,567 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 317 transitions. [2021-11-25 20:31:43,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 317 transitions. [2021-11-25 20:31:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 20:31:43,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:43,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:43,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-25 20:31:43,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:43,782 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1682069059, now seen corresponding path program 1 times [2021-11-25 20:31:43,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:43,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051967528] [2021-11-25 20:31:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:43,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:43,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:43,785 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:43,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 20:31:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:43,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:31:43,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:43,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051967528] [2021-11-25 20:31:43,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051967528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:43,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:43,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:31:43,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019630418] [2021-11-25 20:31:43,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:43,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:43,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:43,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:43,927 INFO L87 Difference]: Start difference. First operand 223 states and 317 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:31:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:43,994 INFO L93 Difference]: Finished difference Result 367 states and 521 transitions. [2021-11-25 20:31:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:43,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-25 20:31:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:43,997 INFO L225 Difference]: With dead ends: 367 [2021-11-25 20:31:43,997 INFO L226 Difference]: Without dead ends: 147 [2021-11-25 20:31:43,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:43,999 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:43,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:31:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-25 20:31:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2021-11-25 20:31:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 120 states have internal predecessors, (157), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-25 20:31:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 186 transitions. [2021-11-25 20:31:44,011 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 186 transitions. Word has length 43 [2021-11-25 20:31:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:44,012 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 186 transitions. [2021-11-25 20:31:44,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:31:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 186 transitions. [2021-11-25 20:31:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:31:44,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:44,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:44,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:44,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:44,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash -690232792, now seen corresponding path program 1 times [2021-11-25 20:31:44,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:44,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404709463] [2021-11-25 20:31:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:44,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:44,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:44,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:44,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 20:31:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:31:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:44,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:31:44,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404709463] [2021-11-25 20:31:44,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404709463] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:44,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:44,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-25 20:31:44,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210762326] [2021-11-25 20:31:44,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:44,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:31:44,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:44,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:31:44,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:31:44,632 INFO L87 Difference]: Start difference. First operand 135 states and 186 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:45,071 INFO L93 Difference]: Finished difference Result 267 states and 394 transitions. [2021-11-25 20:31:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:31:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-25 20:31:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:45,074 INFO L225 Difference]: With dead ends: 267 [2021-11-25 20:31:45,074 INFO L226 Difference]: Without dead ends: 231 [2021-11-25 20:31:45,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:31:45,076 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 187 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:45,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 502 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:31:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-25 20:31:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2021-11-25 20:31:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 142 states have (on average 1.323943661971831) internal successors, (188), 145 states have internal predecessors, (188), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-25 20:31:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2021-11-25 20:31:45,099 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 44 [2021-11-25 20:31:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:45,102 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2021-11-25 20:31:45,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2021-11-25 20:31:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:31:45,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:45,105 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:45,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:45,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:45,317 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:45,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:45,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1084774570, now seen corresponding path program 1 times [2021-11-25 20:31:45,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:45,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834647743] [2021-11-25 20:31:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:45,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:45,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:45,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:45,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:31:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:31:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:31:45,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:45,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:45,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834647743] [2021-11-25 20:31:45,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834647743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:45,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:45,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:45,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892122141] [2021-11-25 20:31:45,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:45,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:45,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:45,469 INFO L87 Difference]: Start difference. First operand 163 states and 225 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:45,505 INFO L93 Difference]: Finished difference Result 170 states and 231 transitions. [2021-11-25 20:31:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:45,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-25 20:31:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:45,512 INFO L225 Difference]: With dead ends: 170 [2021-11-25 20:31:45,512 INFO L226 Difference]: Without dead ends: 163 [2021-11-25 20:31:45,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:45,514 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:45,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 382 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:31:45,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-25 20:31:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-25 20:31:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 145 states have internal predecessors, (185), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-25 20:31:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 222 transitions. [2021-11-25 20:31:45,539 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 222 transitions. Word has length 44 [2021-11-25 20:31:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:45,540 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 222 transitions. [2021-11-25 20:31:45,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 222 transitions. [2021-11-25 20:31:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:31:45,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:45,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:45,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:45,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:45,752 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1335974199, now seen corresponding path program 2 times [2021-11-25 20:31:45,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:45,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593559969] [2021-11-25 20:31:45,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:31:45,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:45,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:45,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:45,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 20:31:45,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 20:31:45,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:31:45,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:31:45,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:31:46,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:46,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593559969] [2021-11-25 20:31:46,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593559969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:46,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:46,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:31:46,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393342651] [2021-11-25 20:31:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:46,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:31:46,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:31:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:46,020 INFO L87 Difference]: Start difference. First operand 163 states and 222 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:46,102 INFO L93 Difference]: Finished difference Result 202 states and 279 transitions. [2021-11-25 20:31:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:31:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-25 20:31:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:46,108 INFO L225 Difference]: With dead ends: 202 [2021-11-25 20:31:46,108 INFO L226 Difference]: Without dead ends: 200 [2021-11-25 20:31:46,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:46,109 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:46,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 600 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-25 20:31:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-25 20:31:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2021-11-25 20:31:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.296551724137931) internal successors, (188), 148 states have internal predecessors, (188), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-25 20:31:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2021-11-25 20:31:46,125 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 44 [2021-11-25 20:31:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:46,126 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2021-11-25 20:31:46,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2021-11-25 20:31:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:31:46,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:46,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:46,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:46,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:46,339 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1278715897, now seen corresponding path program 1 times [2021-11-25 20:31:46,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:46,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587948293] [2021-11-25 20:31:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:46,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:46,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:46,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:46,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 20:31:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:46,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:31:46,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:31:46,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:46,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:46,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587948293] [2021-11-25 20:31:46,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587948293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:46,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:46,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:31:46,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969784445] [2021-11-25 20:31:46,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:46,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:31:46,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:31:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:46,576 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:46,653 INFO L93 Difference]: Finished difference Result 212 states and 291 transitions. [2021-11-25 20:31:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:31:46,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-25 20:31:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:46,655 INFO L225 Difference]: With dead ends: 212 [2021-11-25 20:31:46,655 INFO L226 Difference]: Without dead ends: 210 [2021-11-25 20:31:46,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:46,656 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 38 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:46,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 467 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-25 20:31:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-25 20:31:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 171. [2021-11-25 20:31:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 1.2905405405405406) internal successors, (191), 151 states have internal predecessors, (191), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-25 20:31:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 228 transitions. [2021-11-25 20:31:46,672 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 228 transitions. Word has length 44 [2021-11-25 20:31:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:46,673 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 228 transitions. [2021-11-25 20:31:46,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 228 transitions. [2021-11-25 20:31:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:31:46,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:46,674 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:46,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:46,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:46,885 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1134786859, now seen corresponding path program 1 times [2021-11-25 20:31:46,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:46,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677664420] [2021-11-25 20:31:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:46,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:46,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:46,887 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:46,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 20:31:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:46,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:31:47,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:47,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677664420] [2021-11-25 20:31:47,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677664420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:47,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:47,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:31:47,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146020910] [2021-11-25 20:31:47,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:47,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:47,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:47,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:47,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:47,030 INFO L87 Difference]: Start difference. First operand 171 states and 228 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:47,075 INFO L93 Difference]: Finished difference Result 283 states and 388 transitions. [2021-11-25 20:31:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-25 20:31:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:47,079 INFO L225 Difference]: With dead ends: 283 [2021-11-25 20:31:47,079 INFO L226 Difference]: Without dead ends: 231 [2021-11-25 20:31:47,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:47,081 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 75 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:47,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 305 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:31:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-25 20:31:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 190. [2021-11-25 20:31:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 164 states have (on average 1.298780487804878) internal successors, (213), 166 states have internal predecessors, (213), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2021-11-25 20:31:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 256 transitions. [2021-11-25 20:31:47,103 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 256 transitions. Word has length 45 [2021-11-25 20:31:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:47,104 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 256 transitions. [2021-11-25 20:31:47,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 256 transitions. [2021-11-25 20:31:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 20:31:47,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:47,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:47,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:47,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:47,317 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:47,317 INFO L85 PathProgramCache]: Analyzing trace with hash 702695573, now seen corresponding path program 1 times [2021-11-25 20:31:47,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:47,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434345891] [2021-11-25 20:31:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:47,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:47,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:47,319 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:47,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 20:31:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:47,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:31:47,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:47,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:47,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434345891] [2021-11-25 20:31:47,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434345891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:47,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:47,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:31:47,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084723493] [2021-11-25 20:31:47,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:47,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:47,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:47,456 INFO L87 Difference]: Start difference. First operand 190 states and 256 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:47,478 INFO L93 Difference]: Finished difference Result 205 states and 272 transitions. [2021-11-25 20:31:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:31:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2021-11-25 20:31:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:47,486 INFO L225 Difference]: With dead ends: 205 [2021-11-25 20:31:47,487 INFO L226 Difference]: Without dead ends: 166 [2021-11-25 20:31:47,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:47,488 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:47,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:31:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-25 20:31:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-11-25 20:31:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3142857142857143) internal successors, (184), 143 states have internal predecessors, (184), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2021-11-25 20:31:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 225 transitions. [2021-11-25 20:31:47,504 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 225 transitions. Word has length 48 [2021-11-25 20:31:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:47,504 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 225 transitions. [2021-11-25 20:31:47,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 225 transitions. [2021-11-25 20:31:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:31:47,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:47,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:47,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:47,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:47,718 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:47,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:47,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1060673824, now seen corresponding path program 1 times [2021-11-25 20:31:47,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:47,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001089316] [2021-11-25 20:31:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:47,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:47,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:47,720 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:47,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 20:31:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:47,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:31:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:31:47,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:47,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:31:47,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001089316] [2021-11-25 20:31:47,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001089316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:47,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:47,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:47,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133069962] [2021-11-25 20:31:47,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:47,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:47,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:31:47,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:47,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:47,888 INFO L87 Difference]: Start difference. First operand 166 states and 225 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:47,989 INFO L93 Difference]: Finished difference Result 241 states and 330 transitions. [2021-11-25 20:31:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:31:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-11-25 20:31:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:47,991 INFO L225 Difference]: With dead ends: 241 [2021-11-25 20:31:47,991 INFO L226 Difference]: Without dead ends: 199 [2021-11-25 20:31:47,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:47,992 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 128 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:47,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 345 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-25 20:31:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2021-11-25 20:31:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3) internal successors, (182), 143 states have internal predecessors, (182), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2021-11-25 20:31:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 223 transitions. [2021-11-25 20:31:48,004 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 223 transitions. Word has length 49 [2021-11-25 20:31:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:48,004 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 223 transitions. [2021-11-25 20:31:48,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:31:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 223 transitions. [2021-11-25 20:31:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:31:48,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:48,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:48,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:48,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:48,217 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:48,217 INFO L85 PathProgramCache]: Analyzing trace with hash 45509775, now seen corresponding path program 1 times [2021-11-25 20:31:48,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:31:48,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809572886] [2021-11-25 20:31:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:48,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:31:48,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:31:48,221 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:31:48,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 20:31:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:31:48,271 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:31:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:31:48,344 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-25 20:31:48,344 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:31:48,345 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:31:48,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-25 20:31:48,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:31:48,557 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:48,559 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:31:48,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:31:48 BoogieIcfgContainer [2021-11-25 20:31:48,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:31:48,615 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:31:48,615 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:31:48,615 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:31:48,616 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:39" (3/4) ... [2021-11-25 20:31:48,618 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 20:31:48,678 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 20:31:48,678 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:31:48,679 INFO L158 Benchmark]: Toolchain (without parser) took 10184.08ms. Allocated memory was 69.2MB in the beginning and 125.8MB in the end (delta: 56.6MB). Free memory was 50.4MB in the beginning and 51.0MB in the end (delta: -619.7kB). Peak memory consumption was 56.9MB. Max. memory is 16.1GB. [2021-11-25 20:31:48,679 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 69.2MB. Free memory is still 50.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:31:48,680 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.90ms. Allocated memory is still 69.2MB. Free memory was 50.2MB in the beginning and 47.7MB in the end (delta: 2.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:31:48,680 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.36ms. Allocated memory is still 69.2MB. Free memory was 47.7MB in the beginning and 45.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:31:48,680 INFO L158 Benchmark]: Boogie Preprocessor took 32.48ms. Allocated memory is still 69.2MB. Free memory was 45.8MB in the beginning and 44.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:31:48,681 INFO L158 Benchmark]: RCFGBuilder took 507.24ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 44.0MB in the beginning and 82.4MB in the end (delta: -38.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-25 20:31:48,681 INFO L158 Benchmark]: TraceAbstraction took 9105.02ms. Allocated memory was 100.7MB in the beginning and 125.8MB in the end (delta: 25.2MB). Free memory was 81.9MB in the beginning and 55.2MB in the end (delta: 26.7MB). Peak memory consumption was 51.9MB. Max. memory is 16.1GB. [2021-11-25 20:31:48,683 INFO L158 Benchmark]: Witness Printer took 63.26ms. Allocated memory is still 125.8MB. Free memory was 55.2MB in the beginning and 51.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 20:31:48,685 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 69.2MB. Free memory is still 50.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.90ms. Allocated memory is still 69.2MB. Free memory was 50.2MB in the beginning and 47.7MB in the end (delta: 2.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.36ms. Allocated memory is still 69.2MB. Free memory was 47.7MB in the beginning and 45.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.48ms. Allocated memory is still 69.2MB. Free memory was 45.8MB in the beginning and 44.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 507.24ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 44.0MB in the beginning and 82.4MB in the end (delta: -38.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 9105.02ms. Allocated memory was 100.7MB in the beginning and 125.8MB in the end (delta: 25.2MB). Free memory was 81.9MB in the beginning and 55.2MB in the end (delta: 26.7MB). Peak memory consumption was 51.9MB. Max. memory is 16.1GB. * Witness Printer took 63.26ms. Allocated memory is still 125.8MB. Free memory was 55.2MB in the beginning and 51.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L80] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L253] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L258] COND TRUE a > zero [L259] tmp = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, tmp=1, zero=0] [L263] sa = tmp VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L265] COND FALSE !(b < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L268] COND TRUE b > zero [L269] tmp___0 = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L273] sb = tmp___0 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L115] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.0s, OverallIterations: 13, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1056 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1029 mSDsluCounter, 6184 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19 IncrementalHoareTripleChecker+Unchecked, 4796 mSDsCounter, 123 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 881 IncrementalHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 123 mSolverCounterUnsat, 1388 mSDtfsCounter, 881 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 730 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=4, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 456 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 630 NumberOfCodeBlocks, 612 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 702 ConstructedInterpolants, 2 QuantifiedInterpolants, 1106 SizeOfPredicates, 43 NumberOfNonLiveVariables, 1118 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 18 InterpolantComputations, 11 PerfectInterpolantSequences, 255/282 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-25 20:31:48,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_607f305a-d43b-4cfa-8918-bfe462f3eb37/bin/utaipan-eEHZpOm5b7/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE