./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/rlim_invariant.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_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/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_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/rlim_invariant.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/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_274eda22-3824-403a-b746-9cde910f4d7e/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 d395d439ec4556dc83dba3523bab6fe5cf68ec358a108cd3824067669c5e9bc5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:24:34,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:24:34,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:24:34,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:24:34,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:24:34,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:24:34,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:24:34,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:24:34,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:24:34,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:24:34,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:24:34,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:24:34,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:24:34,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:24:34,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:24:34,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:24:34,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:24:34,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:24:34,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:24:34,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:24:34,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:24:34,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:24:34,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:24:34,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:24:34,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:24:34,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:24:34,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:24:34,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:24:34,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:24:34,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:24:34,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:24:34,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:24:34,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:24:34,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:24:34,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:24:34,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:24:34,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:24:34,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:24:34,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:24:34,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:24:34,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:24:34,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:24:34,470 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:24:34,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:24:34,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:24:34,471 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:24:34,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:24:34,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:24:34,478 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:24:34,478 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:24:34,478 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:24:34,478 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:24:34,479 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:24:34,479 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:24:34,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:24:34,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:24:34,480 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:24:34,480 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:24:34,480 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:24:34,481 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:24:34,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:24:34,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:24:34,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:24:34,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:24:34,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:24:34,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:24:34,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:24:34,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:24:34,483 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:24:34,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:24:34,483 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:24:34,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:24:34,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:24:34,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:24:34,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:24:34,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:24:34,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:24:34,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:24:34,485 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:24:34,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:24:34,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:24:34,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:24:34,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:24:34,486 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_274eda22-3824-403a-b746-9cde910f4d7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395d439ec4556dc83dba3523bab6fe5cf68ec358a108cd3824067669c5e9bc5 [2021-11-25 20:24:34,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:24:34,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:24:34,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:24:34,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:24:34,785 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:24:34,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/rlim_invariant.c [2021-11-25 20:24:34,852 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data/a0e75fe88/a1a4ce83411b40e5b9fdda8f4ca76eb1/FLAG5513a74e6 [2021-11-25 20:24:35,373 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:24:35,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/sv-benchmarks/c/float-benchs/rlim_invariant.c [2021-11-25 20:24:35,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data/a0e75fe88/a1a4ce83411b40e5b9fdda8f4ca76eb1/FLAG5513a74e6 [2021-11-25 20:24:35,734 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data/a0e75fe88/a1a4ce83411b40e5b9fdda8f4ca76eb1 [2021-11-25 20:24:35,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:24:35,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:24:35,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:24:35,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:24:35,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:24:35,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:24:35" (1/1) ... [2021-11-25 20:24:35,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8ac91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:35, skipping insertion in model container [2021-11-25 20:24:35,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:24:35" (1/1) ... [2021-11-25 20:24:35,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:24:35,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:24:35,921 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_274eda22-3824-403a-b746-9cde910f4d7e/sv-benchmarks/c/float-benchs/rlim_invariant.c[451,464] [2021-11-25 20:24:35,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:24:35,976 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:24:35,986 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_274eda22-3824-403a-b746-9cde910f4d7e/sv-benchmarks/c/float-benchs/rlim_invariant.c[451,464] [2021-11-25 20:24:35,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:24:36,004 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:24:36,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36 WrapperNode [2021-11-25 20:24:36,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:24:36,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:24:36,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:24:36,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:24:36,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,037 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-11-25 20:24:36,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:24:36,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:24:36,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:24:36,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:24:36,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:24:36,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:24:36,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:24:36,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:24:36,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (1/1) ... [2021-11-25 20:24:36,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:24:36,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:24:36,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:24:36,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:24:36,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:24:36,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:24:36,156 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:24:36,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:24:36,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:24:36,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:24:36,220 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:24:36,222 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:24:36,374 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:24:36,427 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:24:36,427 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:24:36,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:24:36 BoogieIcfgContainer [2021-11-25 20:24:36,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:24:36,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:24:36,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:24:36,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:24:36,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:24:35" (1/3) ... [2021-11-25 20:24:36,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f663d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:24:36, skipping insertion in model container [2021-11-25 20:24:36,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:36" (2/3) ... [2021-11-25 20:24:36,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f663d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:24:36, skipping insertion in model container [2021-11-25 20:24:36,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:24:36" (3/3) ... [2021-11-25 20:24:36,445 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_invariant.c [2021-11-25 20:24:36,450 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:24:36,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:24:36,536 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:24:36,543 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 20:24:36,543 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:24:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:24:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:24:36,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:36,564 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:36,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1198132788, now seen corresponding path program 1 times [2021-11-25 20:24:36,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:24:36,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103850770] [2021-11-25 20:24:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:36,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:24:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:24:36,724 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:24:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:24:36,790 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 20:24:36,792 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:24:36,794 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:24:36,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:24:36,802 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 20:24:36,804 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:24:36,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:24:36 BoogieIcfgContainer [2021-11-25 20:24:36,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:24:36,836 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:24:36,837 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:24:36,837 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:24:36,837 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:24:36" (3/4) ... [2021-11-25 20:24:36,840 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:24:36,841 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:24:36,843 INFO L158 Benchmark]: Toolchain (without parser) took 1104.19ms. Allocated memory is still 107.0MB. Free memory was 65.2MB in the beginning and 54.9MB in the end (delta: 10.4MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2021-11-25 20:24:36,844 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 81.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:24:36,845 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.38ms. Allocated memory is still 107.0MB. Free memory was 65.1MB in the beginning and 82.4MB in the end (delta: -17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:24:36,846 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.93ms. Allocated memory is still 107.0MB. Free memory was 82.4MB in the beginning and 80.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:24:36,847 INFO L158 Benchmark]: Boogie Preprocessor took 19.27ms. Allocated memory is still 107.0MB. Free memory was 80.8MB in the beginning and 79.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:24:36,855 INFO L158 Benchmark]: RCFGBuilder took 371.88ms. Allocated memory is still 107.0MB. Free memory was 79.6MB in the beginning and 69.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:24:36,856 INFO L158 Benchmark]: TraceAbstraction took 401.83ms. Allocated memory is still 107.0MB. Free memory was 68.7MB in the beginning and 55.2MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 20:24:36,857 INFO L158 Benchmark]: Witness Printer took 4.61ms. Allocated memory is still 107.0MB. Free memory was 55.2MB in the beginning and 54.9MB in the end (delta: 336.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:24:36,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 81.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.38ms. Allocated memory is still 107.0MB. Free memory was 65.1MB in the beginning and 82.4MB in the end (delta: -17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.93ms. Allocated memory is still 107.0MB. Free memory was 82.4MB in the beginning and 80.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.27ms. Allocated memory is still 107.0MB. Free memory was 80.8MB in the beginning and 79.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 371.88ms. Allocated memory is still 107.0MB. Free memory was 79.6MB in the beginning and 69.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 401.83ms. Allocated memory is still 107.0MB. Free memory was 68.7MB in the beginning and 55.2MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 4.61ms. Allocated memory is still 107.0MB. Free memory was 55.2MB in the beginning and 54.9MB in the end (delta: 336.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 10]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 29, overapproximation of to_real at line 17, overapproximation of someBinaryArithmeticFLOAToperation at line 28. Possible FailurePath: [L14] float X, Y, S, R, D; [L15] int i; [L17] Y = 0 [L19] i = 0 VAL [i=0] [L19] COND TRUE i < 100000 [L21] X = __VERIFIER_nondet_float() [L22] D = __VERIFIER_nondet_float() [L23] CALL assume_abort_if_not(X >= -128.f && X <= 128.f) VAL [\old(cond)=1] [L8] COND FALSE !(!cond) [L23] RET assume_abort_if_not(X >= -128.f && X <= 128.f) VAL [D=49, i=0, X=50] [L24] CALL assume_abort_if_not(D >= 0.f && D <= 16.f) VAL [\old(cond)=1] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(D >= 0.f && D <= 16.f) VAL [D=49, i=0, X=50] [L26] S = Y [L27] Y = X [L28] R = X - S [L29] COND TRUE R <= -D [L29] Y = S - D [L32] CALL __VERIFIER_assert(Y >= -129.f && Y <= 129.f) [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L10] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 20:24:36,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/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_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/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_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/rlim_invariant.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/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_274eda22-3824-403a-b746-9cde910f4d7e/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 d395d439ec4556dc83dba3523bab6fe5cf68ec358a108cd3824067669c5e9bc5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:24:39,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:24:39,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:24:39,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:24:39,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:24:39,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:24:39,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:24:39,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:24:39,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:24:39,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:24:39,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:24:39,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:24:39,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:24:39,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:24:39,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:24:39,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:24:39,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:24:39,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:24:39,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:24:39,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:24:39,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:24:39,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:24:39,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:24:39,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:24:39,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:24:39,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:24:39,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:24:39,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:24:39,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:24:39,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:24:39,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:24:39,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:24:39,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:24:39,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:24:39,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:24:39,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:24:39,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:24:39,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:24:39,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:24:39,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:24:39,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:24:39,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 20:24:39,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:24:39,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:24:39,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:24:39,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:24:39,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:24:39,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:24:39,402 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:24:39,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:24:39,403 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:24:39,403 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:24:39,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:24:39,404 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:24:39,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:24:39,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:24:39,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:24:39,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:24:39,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:24:39,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:24:39,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:24:39,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:24:39,407 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:24:39,407 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:24:39,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:24:39,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:24:39,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:24:39,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:24:39,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:24:39,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:24:39,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:24:39,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:24:39,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:24:39,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:24:39,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:24:39,410 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:24:39,410 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:24:39,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:24:39,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:24:39,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:24:39,411 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_274eda22-3824-403a-b746-9cde910f4d7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395d439ec4556dc83dba3523bab6fe5cf68ec358a108cd3824067669c5e9bc5 [2021-11-25 20:24:39,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:24:39,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:24:39,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:24:39,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:24:39,826 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:24:39,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/rlim_invariant.c [2021-11-25 20:24:39,905 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data/e9cfd17cc/0e9910ae679d48e58010453601211b6c/FLAGe43df4c22 [2021-11-25 20:24:40,411 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:24:40,413 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/sv-benchmarks/c/float-benchs/rlim_invariant.c [2021-11-25 20:24:40,419 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data/e9cfd17cc/0e9910ae679d48e58010453601211b6c/FLAGe43df4c22 [2021-11-25 20:24:40,796 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/data/e9cfd17cc/0e9910ae679d48e58010453601211b6c [2021-11-25 20:24:40,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:24:40,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:24:40,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:24:40,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:24:40,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:24:40,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:24:40" (1/1) ... [2021-11-25 20:24:40,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff34c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:40, skipping insertion in model container [2021-11-25 20:24:40,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:24:40" (1/1) ... [2021-11-25 20:24:40,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:24:40,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:24:41,030 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_274eda22-3824-403a-b746-9cde910f4d7e/sv-benchmarks/c/float-benchs/rlim_invariant.c[451,464] [2021-11-25 20:24:41,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:24:41,059 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:24:41,091 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_274eda22-3824-403a-b746-9cde910f4d7e/sv-benchmarks/c/float-benchs/rlim_invariant.c[451,464] [2021-11-25 20:24:41,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:24:41,134 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:24:41,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41 WrapperNode [2021-11-25 20:24:41,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:24:41,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:24:41,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:24:41,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:24:41,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,171 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-11-25 20:24:41,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:24:41,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:24:41,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:24:41,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:24:41,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:24:41,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:24:41,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:24:41,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:24:41,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (1/1) ... [2021-11-25 20:24:41,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:24:41,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:24:41,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:24:41,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:24:41,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:24:41,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:24:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:24:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:24:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:24:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:24:41,339 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:24:41,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:24:41,601 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:24:41,606 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:24:41,607 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:24:41,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:24:41 BoogieIcfgContainer [2021-11-25 20:24:41,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:24:41,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:24:41,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:24:41,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:24:41,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:24:40" (1/3) ... [2021-11-25 20:24:41,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa4a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:24:41, skipping insertion in model container [2021-11-25 20:24:41,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:24:41" (2/3) ... [2021-11-25 20:24:41,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa4a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:24:41, skipping insertion in model container [2021-11-25 20:24:41,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:24:41" (3/3) ... [2021-11-25 20:24:41,616 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_invariant.c [2021-11-25 20:24:41,621 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:24:41,621 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:24:41,677 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:24:41,684 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 20:24:41,684 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:24:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:24:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:24:41,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:41,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:41,704 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1358229485, now seen corresponding path program 1 times [2021-11-25 20:24:41,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:24:41,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788578140] [2021-11-25 20:24:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:41,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:24:41,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:24:41,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:24:41,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:24:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:41,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 20:24:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:24:41,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:24:41,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:24:41,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788578140] [2021-11-25 20:24:41,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788578140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:24:41,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:24:41,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:24:41,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578268166] [2021-11-25 20:24:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:24:41,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:24:41,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:24:41,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:24:41,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:24:41,977 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:24:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:41,996 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-11-25 20:24:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:24:41,999 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-25 20:24:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:42,019 INFO L225 Difference]: With dead ends: 42 [2021-11-25 20:24:42,019 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:24:42,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:24:42,026 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:42,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:24:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:24:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 20:24:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:24:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-25 20:24:42,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 18 [2021-11-25 20:24:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:42,059 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-25 20:24:42,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:24:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-25 20:24:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:24:42,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:42,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:42,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:24:42,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:24:42,277 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:42,282 INFO L85 PathProgramCache]: Analyzing trace with hash -37923155, now seen corresponding path program 1 times [2021-11-25 20:24:42,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:24:42,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273068409] [2021-11-25 20:24:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:42,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:24:42,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:24:42,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:24:42,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:24:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:24:42,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:24:43,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:24:43,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:24:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273068409] [2021-11-25 20:24:43,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273068409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:24:43,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:24:43,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:24:43,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941047158] [2021-11-25 20:24:43,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:24:43,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:24:43,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:24:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:24:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:24:43,033 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:24:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:43,625 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-11-25 20:24:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:24:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-25 20:24:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:43,631 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:24:43,632 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 20:24:43,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:24:43,634 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:43,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 104 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 15 Unchecked, 0.5s Time] [2021-11-25 20:24:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 20:24:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-11-25 20:24:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 20:24:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-25 20:24:43,655 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2021-11-25 20:24:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:43,656 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-25 20:24:43,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:24:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-25 20:24:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:24:43,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:43,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:43,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-25 20:24:43,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:24:43,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1173892842, now seen corresponding path program 1 times [2021-11-25 20:24:43,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:24:43,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784027521] [2021-11-25 20:24:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:43,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:24:43,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:24:43,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:24:43,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:24:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:43,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:24:43,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:24:44,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:24:44,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:24:44,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784027521] [2021-11-25 20:24:44,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784027521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:24:44,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:24:44,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:24:44,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358253192] [2021-11-25 20:24:44,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:24:44,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:24:44,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:24:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:24:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:24:44,402 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:24:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:45,376 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-11-25 20:24:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:24:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-25 20:24:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:45,378 INFO L225 Difference]: With dead ends: 50 [2021-11-25 20:24:45,378 INFO L226 Difference]: Without dead ends: 48 [2021-11-25 20:24:45,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:24:45,380 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:45,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 88 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 133 Invalid, 0 Unknown, 27 Unchecked, 0.8s Time] [2021-11-25 20:24:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-25 20:24:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2021-11-25 20:24:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 20:24:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-25 20:24:45,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 19 [2021-11-25 20:24:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:45,390 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-25 20:24:45,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:24:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-25 20:24:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:24:45,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:45,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:45,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:24:45,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:24:45,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1173833260, now seen corresponding path program 1 times [2021-11-25 20:24:45,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:24:45,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517223064] [2021-11-25 20:24:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:45,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:24:45,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:24:45,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:24:45,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 20:24:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:24:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:24:45,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:24:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:24:46,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:24:46,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517223064] [2021-11-25 20:24:46,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517223064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:24:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [940996189] [2021-11-25 20:24:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:46,177 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:24:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:24:46,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:24:46,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-25 20:24:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:24:46,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:24:46,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:24:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:24:46,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [940996189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:24:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553467157] [2021-11-25 20:24:46,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:46,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:24:46,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:24:46,664 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:24:46,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:24:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:46,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:24:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:24:46,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:24:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:24:47,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553467157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:24:47,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:24:47,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 7] total 13 [2021-11-25 20:24:47,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582567953] [2021-11-25 20:24:47,256 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:24:47,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:24:47,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:24:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:24:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:24:47,258 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 20:24:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:48,644 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-11-25 20:24:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:24:48,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 19 [2021-11-25 20:24:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:48,650 INFO L225 Difference]: With dead ends: 45 [2021-11-25 20:24:48,650 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 20:24:48,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:24:48,652 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:48,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 162 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 20:24:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 20:24:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-11-25 20:24:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 20:24:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-25 20:24:48,660 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 19 [2021-11-25 20:24:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:48,661 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-25 20:24:48,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 20:24:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-25 20:24:48,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 20:24:48,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:48,663 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:48,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-25 20:24:48,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:24:49,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:24:49,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:24:49,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1809540222, now seen corresponding path program 1 times [2021-11-25 20:24:49,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:24:49,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040203032] [2021-11-25 20:24:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:49,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:24:49,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:24:49,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:24:49,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 20:24:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:24:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:26:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:26:05,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:26:37,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:26:37,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040203032] [2021-11-25 20:26:37,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040203032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:26:37,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1778769832] [2021-11-25 20:26:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:37,951 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:26:37,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:26:37,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:26:37,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 20:26:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:38,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:26:38,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:27:13,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:31,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1778769832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:31,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209572517] [2021-11-25 20:27:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:31,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:31,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:31,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:31,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:27:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 20:27:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:28:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 1 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:28:27,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:28:37,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209572517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:28:37,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:28:37,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14] total 24 [2021-11-25 20:28:37,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303063927] [2021-11-25 20:28:37,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:28:37,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:28:37,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:28:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:28:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=850, Unknown=19, NotChecked=0, Total=1056 [2021-11-25 20:28:37,463 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-25 20:30:05,833 WARN L227 SmtUtils]: Spent 7.81s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:30:44,512 WARN L227 SmtUtils]: Spent 20.91s on a formula simplification. DAG size of input: 48 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:30:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:44,514 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-11-25 20:30:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 20:30:44,514 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) Word has length 35 [2021-11-25 20:30:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:44,515 INFO L225 Difference]: With dead ends: 56 [2021-11-25 20:30:44,515 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 20:30:44,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 269.5s TimeCoverageRelationStatistics Valid=285, Invalid=1307, Unknown=48, NotChecked=0, Total=1640 [2021-11-25 20:30:44,517 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:44,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 177 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2021-11-25 20:30:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 20:30:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2021-11-25 20:30:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 20:30:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-11-25 20:30:44,523 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 35 [2021-11-25 20:30:44,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:44,523 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-11-25 20:30:44,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-25 20:30:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-11-25 20:30:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 20:30:44,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:44,525 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:44,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:30:44,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:30:44,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:30:45,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:30:45,126 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:30:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash -259447071, now seen corresponding path program 1 times [2021-11-25 20:30:45,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:30:45,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154273071] [2021-11-25 20:30:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:45,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:30:45,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:30:45,129 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:30:45,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 20:30:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:45,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 20:30:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:38,899 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:31:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:31:52,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:39,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:32:39,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154273071] [2021-11-25 20:32:39,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154273071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:39,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [779200163] [2021-11-25 20:32:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:39,618 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:32:39,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:32:39,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:32:39,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 20:32:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:32:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:33:35,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:34:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [779200163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31093075] [2021-11-25 20:34:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:07,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:07,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:07,801 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:07,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:34:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:34:09,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:35:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:35:34,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:36:15,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31093075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:36:15,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:36:15,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 24 [2021-11-25 20:36:15,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693031693] [2021-11-25 20:36:15,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:36:15,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:36:15,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:36:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:36:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1035, Unknown=31, NotChecked=0, Total=1260 [2021-11-25 20:36:15,765 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-25 20:37:13,881 WARN L227 SmtUtils]: Spent 6.60s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:37:50,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:50,655 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-11-25 20:37:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 20:37:50,656 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 36 [2021-11-25 20:37:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:50,658 INFO L225 Difference]: With dead ends: 76 [2021-11-25 20:37:50,658 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 20:37:50,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 322.5s TimeCoverageRelationStatistics Valid=332, Invalid=1692, Unknown=46, NotChecked=0, Total=2070 [2021-11-25 20:37:50,660 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:50,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2021-11-25 20:37:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 20:37:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-11-25 20:37:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 20:37:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-11-25 20:37:50,671 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 36 [2021-11-25 20:37:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:50,672 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-11-25 20:37:50,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-25 20:37:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-11-25 20:37:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 20:37:50,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:50,674 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:50,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:50,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-25 20:37:51,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:51,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:37:51,288 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:51,289 INFO L85 PathProgramCache]: Analyzing trace with hash -625795015, now seen corresponding path program 2 times [2021-11-25 20:37:51,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:37:51,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443709952] [2021-11-25 20:37:51,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:37:51,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:37:51,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:37:51,291 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:37:51,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274eda22-3824-403a-b746-9cde910f4d7e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 20:37:51,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:37:51,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:37:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:37:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates...