./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF --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 f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:22:36,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:22:36,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:22:36,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:22:36,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:22:36,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:22:36,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:22:36,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:22:36,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:22:36,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:22:36,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:22:36,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:22:36,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:22:36,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:22:36,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:22:36,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:22:36,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:22:36,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:22:36,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:22:36,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:22:36,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:22:36,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:22:36,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:22:36,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:22:36,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:22:36,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:22:36,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:22:36,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:22:36,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:22:36,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:22:36,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:22:36,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:22:36,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:22:36,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:22:36,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:22:36,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:22:36,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:22:36,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:22:36,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:22:36,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:22:36,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:22:36,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:22:37,016 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:22:37,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:22:37,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:22:37,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:22:37,019 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:22:37,019 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:22:37,019 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:22:37,020 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:22:37,020 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:22:37,020 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:22:37,021 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:22:37,022 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:22:37,022 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:22:37,022 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:22:37,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:22:37,023 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:22:37,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:22:37,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:22:37,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:22:37,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:22:37,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:22:37,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:22:37,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:22:37,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:22:37,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:22:37,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:22:37,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:22:37,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:22:37,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:22:37,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:22:37,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:22:37,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:37,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:22:37,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:22:37,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:22:37,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:22:37,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:22:37,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:22:37,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:22:37,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:22:37,032 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_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 [2021-11-12 23:22:37,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:22:37,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:22:37,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:22:37,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:22:37,399 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:22:37,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2021-11-12 23:22:37,474 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data/070f2ebad/f3521c355b56414cbf7156aef6f763c7/FLAG9f524ba51 [2021-11-12 23:22:37,988 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:22:37,989 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2021-11-12 23:22:38,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data/070f2ebad/f3521c355b56414cbf7156aef6f763c7/FLAG9f524ba51 [2021-11-12 23:22:38,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data/070f2ebad/f3521c355b56414cbf7156aef6f763c7 [2021-11-12 23:22:38,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:22:38,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:22:38,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:38,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:22:38,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:22:38,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@247b42aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38, skipping insertion in model container [2021-11-12 23:22:38,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:22:38,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:22:38,670 WARN L228 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_5c6732a0-666b-49fe-85e3-1434c4aea887/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2021-11-12 23:22:38,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:38,691 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:22:38,708 WARN L228 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_5c6732a0-666b-49fe-85e3-1434c4aea887/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2021-11-12 23:22:38,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:38,742 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:22:38,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38 WrapperNode [2021-11-12 23:22:38,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:38,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:38,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:22:38,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:22:38,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:38,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:22:38,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:22:38,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:22:38,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:22:38,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:22:38,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:22:38,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:22:38,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (1/1) ... [2021-11-12 23:22:38,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:38,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:38,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:22:38,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:22:38,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:22:38,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:22:38,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:22:38,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:22:38,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:22:38,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:22:39,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:22:39,169 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:22:39,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:39 BoogieIcfgContainer [2021-11-12 23:22:39,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:22:39,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:22:39,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:22:39,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:22:39,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:22:38" (1/3) ... [2021-11-12 23:22:39,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@872b71d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:39, skipping insertion in model container [2021-11-12 23:22:39,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:38" (2/3) ... [2021-11-12 23:22:39,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@872b71d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:39, skipping insertion in model container [2021-11-12 23:22:39,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:39" (3/3) ... [2021-11-12 23:22:39,179 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2021-11-12 23:22:39,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:22:39,185 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:22:39,247 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:22:39,258 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 [2021-11-12 23:22:39,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:22:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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) [2021-11-12 23:22:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:22:39,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:39,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:39,287 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1881233236, now seen corresponding path program 1 times [2021-11-12 23:22:39,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:39,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43074942] [2021-11-12 23:22:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:39,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:39,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:39,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43074942] [2021-11-12 23:22:39,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43074942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:39,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:39,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:22:39,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431963627] [2021-11-12 23:22:39,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:39,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:22:39,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:22:39,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:22:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:22:39,588 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:39,648 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2021-11-12 23:22:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:22:39,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:22:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:39,658 INFO L225 Difference]: With dead ends: 27 [2021-11-12 23:22:39,658 INFO L226 Difference]: Without dead ends: 13 [2021-11-12 23:22:39,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:22:39,666 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.55ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:39,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.55ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 40.75ms Time] [2021-11-12 23:22:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-12 23:22:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-12 23:22:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 23:22:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-12 23:22:39,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-11-12 23:22:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:39,704 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-12 23:22:39,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-12 23:22:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:22:39,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:39,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:39,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:22:39,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -515868340, now seen corresponding path program 1 times [2021-11-12 23:22:39,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:39,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845443129] [2021-11-12 23:22:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:39,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:39,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:22:39,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024359516] [2021-11-12 23:22:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:39,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:39,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:39,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:39,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:22:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:39,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:22:39,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:40,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:40,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:40,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845443129] [2021-11-12 23:22:40,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:40,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024359516] [2021-11-12 23:22:40,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024359516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:40,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:40,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 23:22:40,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490728507] [2021-11-12 23:22:40,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:40,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:22:40,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:22:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:22:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:22:40,222 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:42,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 23:22:44,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:44,566 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-12 23:22:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:22:44,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:22:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:44,568 INFO L225 Difference]: With dead ends: 31 [2021-11-12 23:22:44,569 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 23:22:44,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:22:44,571 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4121.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.63ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4316.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:44,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 57 Unknown, 0 Unchecked, 2.63ms Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 2 Unknown, 0 Unchecked, 4316.08ms Time] [2021-11-12 23:22:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 23:22:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-12 23:22:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:22:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-12 23:22:44,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 8 [2021-11-12 23:22:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:44,584 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-12 23:22:44,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-12 23:22:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 23:22:44,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:44,586 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:44,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:44,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:44,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash 977989570, now seen corresponding path program 1 times [2021-11-12 23:22:44,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:44,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616592250] [2021-11-12 23:22:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:44,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:44,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:22:44,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941098075] [2021-11-12 23:22:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:44,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:44,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:44,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:44,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:22:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:44,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:22:44,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:45,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:45,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:45,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616592250] [2021-11-12 23:22:45,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:45,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941098075] [2021-11-12 23:22:45,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~b~0#1|] [2021-11-12 23:22:45,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025264276] [2021-11-12 23:22:45,278 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:22:45,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:22:45,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:22:45,288 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:22:45,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:22:45,320 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,322 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:45,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:22:45,327 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:45,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:22:45,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 23:22:45,358 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 10=[|v_#valid_17|]} [2021-11-12 23:22:45,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-12 23:22:45,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:22:45,373 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:22:45,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:45,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:45,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:22:45,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:45,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:45,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:45,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:45,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:45,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:22:45,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:45,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:45,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:45,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-12 23:22:45,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:22:45,569 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:228, output treesize:98 [2021-11-12 23:22:45,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-12 23:22:45,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,743 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-12 23:22:45,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:45,907 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.3 percent of original size [2021-11-12 23:22:45,910 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 23:22:45,928 INFO L180 QuantifierPusher]: treesize reduction 43, result has 64.2 percent of original size [2021-11-12 23:22:45,946 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:45,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,956 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:45,957 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:22:45,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 23:22:45,971 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:45,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:45,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 23:22:45,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:22:45,999 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.3 percent of original size [2021-11-12 23:22:46,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:22:46,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:46,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:46,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:46,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:46,060 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2021-11-12 23:22:46,069 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:22:47,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:47,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:47,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-12 23:22:47,103 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-12 23:22:47,104 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-12 23:22:47,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:22:47,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:47,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:47,315 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-12 23:22:47,317 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:22:47,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:22:47 BoogieIcfgContainer [2021-11-12 23:22:47,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:22:47,331 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:22:47,331 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:22:47,331 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:22:47,332 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:39" (3/4) ... [2021-11-12 23:22:47,335 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:22:47,335 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:22:47,336 INFO L158 Benchmark]: Toolchain (without parser) took 8942.71ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 74.2MB in the beginning and 56.1MB in the end (delta: 18.1MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2021-11-12 23:22:47,337 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:22:47,337 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.92ms. Allocated memory is still 117.4MB. Free memory was 74.0MB in the beginning and 90.7MB in the end (delta: -16.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:22:47,338 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.06ms. Allocated memory is still 117.4MB. Free memory was 90.7MB in the beginning and 89.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:22:47,338 INFO L158 Benchmark]: Boogie Preprocessor took 22.48ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 88.5MB in the end (delta: 942.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:22:47,339 INFO L158 Benchmark]: RCFGBuilder took 376.31ms. Allocated memory is still 117.4MB. Free memory was 88.3MB in the beginning and 77.4MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:22:47,339 INFO L158 Benchmark]: TraceAbstraction took 8156.49ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 76.9MB in the beginning and 56.1MB in the end (delta: 20.8MB). Peak memory consumption was 47.9MB. Max. memory is 16.1GB. [2021-11-12 23:22:47,340 INFO L158 Benchmark]: Witness Printer took 4.94ms. Allocated memory is still 142.6MB. Free memory is still 56.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:22:47,342 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 117.4MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.92ms. Allocated memory is still 117.4MB. Free memory was 74.0MB in the beginning and 90.7MB in the end (delta: -16.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.06ms. Allocated memory is still 117.4MB. Free memory was 90.7MB in the beginning and 89.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.48ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 88.5MB in the end (delta: 942.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 376.31ms. Allocated memory is still 117.4MB. Free memory was 88.3MB in the beginning and 77.4MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 8156.49ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 76.9MB in the beginning and 56.1MB in the end (delta: 20.8MB). Peak memory consumption was 47.9MB. Max. memory is 16.1GB. * Witness Printer took 4.94ms. Allocated memory is still 142.6MB. Free memory is still 56.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L29] CALL assume_abort_if_not(A>=0 && A<=5) [L16] COND TRUE !cond [L29] RET assume_abort_if_not(A>=0 && A<=5) [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 4356.82ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 56 SdHoareTripleChecker+Invalid, 4160.18ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53 IncrementalHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 22 mSDtfsCounter, 53 mSolverCounterSat, 3.18ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 229 SizeOfPredicates, 4 NumberOfNonLiveVariables, 108 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 0/6 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 [2021-11-12 23:22:47,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/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_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF --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 f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:22:49,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:22:49,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:22:49,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:22:49,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:22:49,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:22:50,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:22:50,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:22:50,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:22:50,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:22:50,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:22:50,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:22:50,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:22:50,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:22:50,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:22:50,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:22:50,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:22:50,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:22:50,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:22:50,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:22:50,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:22:50,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:22:50,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:22:50,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:22:50,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:22:50,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:22:50,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:22:50,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:22:50,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:22:50,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:22:50,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:22:50,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:22:50,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:22:50,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:22:50,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:22:50,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:22:50,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:22:50,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:22:50,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:22:50,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:22:50,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:22:50,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:22:50,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:22:50,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:22:50,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:22:50,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:22:50,129 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:22:50,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:22:50,129 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:22:50,130 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:22:50,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:22:50,130 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:22:50,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:22:50,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:22:50,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:22:50,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:22:50,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:22:50,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:22:50,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:22:50,134 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:22:50,134 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:22:50,134 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:22:50,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:22:50,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:22:50,135 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:22:50,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:22:50,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:22:50,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:22:50,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:22:50,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:50,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:22:50,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:22:50,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:22:50,137 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:22:50,137 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:22:50,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:22:50,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:22:50,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:22:50,138 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_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 [2021-11-12 23:22:50,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:22:50,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:22:50,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:22:50,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:22:50,546 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:22:50,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2021-11-12 23:22:50,607 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data/e56ea46e7/17001f7ac8c44346854c42ac35aaf40c/FLAGf6478c11d [2021-11-12 23:22:51,189 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:22:51,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2021-11-12 23:22:51,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data/e56ea46e7/17001f7ac8c44346854c42ac35aaf40c/FLAGf6478c11d [2021-11-12 23:22:51,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/data/e56ea46e7/17001f7ac8c44346854c42ac35aaf40c [2021-11-12 23:22:51,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:22:51,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:22:51,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:51,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:22:51,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:22:51,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4627b60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51, skipping insertion in model container [2021-11-12 23:22:51,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:22:51,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:22:51,786 WARN L228 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_5c6732a0-666b-49fe-85e3-1434c4aea887/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2021-11-12 23:22:51,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:51,813 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:22:51,828 WARN L228 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_5c6732a0-666b-49fe-85e3-1434c4aea887/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2021-11-12 23:22:51,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:51,848 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:22:51,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51 WrapperNode [2021-11-12 23:22:51,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:51,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:51,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:22:51,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:22:51,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:51,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:22:51,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:22:51,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:22:51,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:22:51,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:22:51,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:22:51,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:22:51,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (1/1) ... [2021-11-12 23:22:51,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:51,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:51,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:22:51,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:22:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:22:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:22:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:22:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:22:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:22:52,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:22:52,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:22:52,376 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:22:52,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:52 BoogieIcfgContainer [2021-11-12 23:22:52,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:22:52,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:22:52,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:22:52,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:22:52,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:22:51" (1/3) ... [2021-11-12 23:22:52,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36190279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:52, skipping insertion in model container [2021-11-12 23:22:52,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:51" (2/3) ... [2021-11-12 23:22:52,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36190279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:52, skipping insertion in model container [2021-11-12 23:22:52,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:52" (3/3) ... [2021-11-12 23:22:52,392 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2021-11-12 23:22:52,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:22:52,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:22:52,474 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:22:52,486 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 [2021-11-12 23:22:52,487 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:22:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2021-11-12 23:22:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:22:52,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:52,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:52,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1090701444, now seen corresponding path program 1 times [2021-11-12 23:22:52,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:52,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542052553] [2021-11-12 23:22:52,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:52,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:52,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:52,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:52,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:22:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:22:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:52,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:52,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:52,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542052553] [2021-11-12 23:22:52,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542052553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:52,857 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:52,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:22:52,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886839649] [2021-11-12 23:22:52,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:52,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:22:52,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:52,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:22:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:22:52,913 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:52,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:52,943 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2021-11-12 23:22:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:22:52,946 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 23:22:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:52,955 INFO L225 Difference]: With dead ends: 39 [2021-11-12 23:22:52,956 INFO L226 Difference]: Without dead ends: 17 [2021-11-12 23:22:52,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:22:52,965 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.59ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:52,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 2.59ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:22:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-12 23:22:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-12 23:22:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) 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, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 23:22:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-12 23:22:53,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-11-12 23:22:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:53,015 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-12 23:22:53,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-12 23:22:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:22:53,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:53,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:53,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:53,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:53,223 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2095969935, now seen corresponding path program 1 times [2021-11-12 23:22:53,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:53,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653327497] [2021-11-12 23:22:53,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:53,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:53,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:53,226 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:53,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:22:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:22:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:53,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:54,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:54,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653327497] [2021-11-12 23:22:54,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653327497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:54,472 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:54,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-11-12 23:22:54,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027255070] [2021-11-12 23:22:54,473 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:54,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:22:54,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:22:54,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:22:54,476 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:57,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:57,787 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-12 23:22:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:22:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-12 23:22:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:57,791 INFO L225 Difference]: With dead ends: 36 [2021-11-12 23:22:57,791 INFO L226 Difference]: Without dead ends: 32 [2021-11-12 23:22:57,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:22:57,794 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2531.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2634.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:57,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 60 Invalid, 106 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [27 Valid, 78 Invalid, 1 Unknown, 0 Unchecked, 2634.04ms Time] [2021-11-12 23:22:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-12 23:22:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-12 23:22:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 23:22:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-12 23:22:57,805 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 11 [2021-11-12 23:22:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:57,805 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-12 23:22:57,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-12 23:22:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:22:57,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:57,807 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:57,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:22:58,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:58,018 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2061362535, now seen corresponding path program 1 times [2021-11-12 23:22:58,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:58,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43745454] [2021-11-12 23:22:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:58,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:58,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:58,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:58,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:22:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:58,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:22:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:58,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:00,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:00,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43745454] [2021-11-12 23:23:00,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43745454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:00,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [164815143] [2021-11-12 23:23:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:00,449 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:23:00,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:23:00,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:23:00,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:23:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:00,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:00,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:00,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:01,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [164815143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:01,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364612855] [2021-11-12 23:23:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:01,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:01,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:01,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:01,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:23:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:01,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:23:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:02,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:02,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364612855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:02,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:23:02,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7, 7, 10, 8] total 21 [2021-11-12 23:23:02,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211485294] [2021-11-12 23:23:02,717 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:02,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 23:23:02,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:02,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 23:23:02,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:23:02,720 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:06,835 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2021-11-12 23:23:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:23:06,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-12 23:23:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:06,838 INFO L225 Difference]: With dead ends: 74 [2021-11-12 23:23:06,838 INFO L226 Difference]: Without dead ends: 66 [2021-11-12 23:23:06,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:23:06,840 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2005.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.64ms SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2175.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:06,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 155 Invalid, 342 Unknown, 0 Unchecked, 6.64ms Time], IncrementalHoareTripleChecker [98 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 2175.89ms Time] [2021-11-12 23:23:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-12 23:23:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2021-11-12 23:23:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:23:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-12 23:23:06,855 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 15 [2021-11-12 23:23:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:06,856 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-12 23:23:06,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-12 23:23:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 23:23:06,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:06,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:06,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:07,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-12 23:23:07,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 23:23:07,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:07,474 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:07,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1238079191, now seen corresponding path program 1 times [2021-11-12 23:23:07,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:07,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402627757] [2021-11-12 23:23:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:07,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:07,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:07,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:23:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:23:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:23:07,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:23:07,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:07,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402627757] [2021-11-12 23:23:07,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402627757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:07,693 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:07,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:23:07,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654590731] [2021-11-12 23:23:07,693 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:07,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:23:07,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:23:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:23:07,696 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 23:23:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:07,727 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2021-11-12 23:23:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:23:07,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-12 23:23:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:07,736 INFO L225 Difference]: With dead ends: 70 [2021-11-12 23:23:07,736 INFO L226 Difference]: Without dead ends: 38 [2021-11-12 23:23:07,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:23:07,738 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:07,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 9 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 15.54ms Time] [2021-11-12 23:23:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-12 23:23:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-12 23:23:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:23:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-12 23:23:07,747 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 27 [2021-11-12 23:23:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:07,747 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-12 23:23:07,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 23:23:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-12 23:23:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-12 23:23:07,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:07,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:07,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:07,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:07,961 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:07,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1335567410, now seen corresponding path program 1 times [2021-11-12 23:23:07,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:07,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542701745] [2021-11-12 23:23:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:07,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:07,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:07,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:07,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:23:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:08,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:23:08,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:23:08,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:23:08,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:08,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542701745] [2021-11-12 23:23:08,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542701745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:08,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681752471] [2021-11-12 23:23:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:08,290 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:23:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:23:08,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:23:08,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:23:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:08,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:23:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:23:08,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:23:08,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [681752471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:08,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408140137] [2021-11-12 23:23:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:08,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:08,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:08,631 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:08,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:23:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:08,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:23:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:23:08,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:23:08,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408140137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:08,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:23:08,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5, 4, 5] total 7 [2021-11-12 23:23:08,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518817478] [2021-11-12 23:23:08,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:08,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:23:08,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:08,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:23:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:23:08,974 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:23:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:09,072 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-11-12 23:23:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:09,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2021-11-12 23:23:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:09,074 INFO L225 Difference]: With dead ends: 68 [2021-11-12 23:23:09,074 INFO L226 Difference]: Without dead ends: 32 [2021-11-12 23:23:09,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:23:09,076 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:09,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 36 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 86.46ms Time] [2021-11-12 23:23:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-12 23:23:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-12 23:23:09,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 23:23:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-12 23:23:09,090 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 29 [2021-11-12 23:23:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:09,090 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-12 23:23:09,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:23:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-12 23:23:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 23:23:09,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:09,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:09,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:09,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:09,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:09,706 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash 532465357, now seen corresponding path program 2 times [2021-11-12 23:23:09,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:09,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417978798] [2021-11-12 23:23:09,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:23:09,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:09,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:09,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:09,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:23:09,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:23:09,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:09,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 23:23:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:23:10,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:23:20,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:20,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417978798] [2021-11-12 23:23:20,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417978798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:20,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [943585191] [2021-11-12 23:23:20,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:23:20,897 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:23:20,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:23:20,907 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:23:20,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:23:21,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:23:21,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:23:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:23:21,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:23:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [943585191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:30,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667563693] [2021-11-12 23:23:30,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:23:30,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:30,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:30,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:30,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 23:23:30,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:23:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:30,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:23:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:23:30,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:23:57,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667563693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:57,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:23:57,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 14, 12, 16, 13] total 38 [2021-11-12 23:23:57,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650108309] [2021-11-12 23:23:57,876 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:57,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-12 23:23:57,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:57,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-12 23:23:57,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1174, Unknown=7, NotChecked=0, Total=1406 [2021-11-12 23:23:57,878 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:24:18,519 WARN L227 SmtUtils]: Spent 18.41s on a formula simplification. DAG size of input: 113 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:24:28,663 WARN L227 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 93 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:24:48,812 WARN L227 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 94 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:24:59,824 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 85 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:25:22,567 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 86 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:25:34,877 WARN L227 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 97 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:25:37,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:39,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:41,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:53,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:55,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:57,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:59,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:01,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:03,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:05,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:27,184 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 79 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:26:29,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:30,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:32,026 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:34,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:40,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:43,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:48,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:50,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:52,624 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:11,937 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 109 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:27:16,956 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:19,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:42,191 WARN L227 SmtUtils]: Spent 16.41s on a formula simplification. DAG size of input: 110 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:27:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:54,960 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2021-11-12 23:27:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-12 23:27:54,962 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2021-11-12 23:27:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:54,964 INFO L225 Difference]: With dead ends: 146 [2021-11-12 23:27:54,964 INFO L226 Difference]: Without dead ends: 114 [2021-11-12 23:27:54,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 213.3s TimeCoverageRelationStatistics Valid=875, Invalid=3937, Unknown=18, NotChecked=0, Total=4830 [2021-11-12 23:27:54,969 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 265 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 290 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60911.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.26ms SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61765.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:54,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 330 Invalid, 986 Unknown, 0 Unchecked, 13.26ms Time], IncrementalHoareTripleChecker [290 Valid, 677 Invalid, 19 Unknown, 0 Unchecked, 61765.43ms Time] [2021-11-12 23:27:54,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-12 23:27:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-11-12 23:27:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 68 states have internal predecessors, (73), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 9 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:27:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-11-12 23:27:54,994 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 31 [2021-11-12 23:27:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:54,995 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-11-12 23:27:54,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:27:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-11-12 23:27:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 23:27:54,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:54,998 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:55,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:55,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-12 23:27:55,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-12 23:27:55,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:55,599 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:55,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1234214144, now seen corresponding path program 3 times [2021-11-12 23:27:55,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:55,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925384683] [2021-11-12 23:27:55,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:55,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:55,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:55,601 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:55,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:27:55,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 23:27:55,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:27:55,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:27:56,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:27:56,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:56,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925384683] [2021-11-12 23:27:56,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925384683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:56,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [626459068] [2021-11-12 23:27:56,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:56,306 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:56,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:27:56,307 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:27:56,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:27:56,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 23:27:56,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:27:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:27:56,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:27:56,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [626459068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:56,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126336187] [2021-11-12 23:27:56,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:56,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:56,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:56,897 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:56,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:27:57,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 23:27:57,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:27:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:27:57,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:27:57,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126336187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:57,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:27:57,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5, 7, 5, 7] total 16 [2021-11-12 23:27:57,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164064243] [2021-11-12 23:27:57,328 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:27:57,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:27:57,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:57,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:27:57,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:27:57,330 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 23:27:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:58,666 INFO L93 Difference]: Finished difference Result 146 states and 188 transitions. [2021-11-12 23:27:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:27:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-12 23:27:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:58,671 INFO L225 Difference]: With dead ends: 146 [2021-11-12 23:27:58,672 INFO L226 Difference]: Without dead ends: 72 [2021-11-12 23:27:58,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 209 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:27:58,674 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 84 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 408.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 486.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:58,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 204 Invalid, 307 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [97 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 486.76ms Time] [2021-11-12 23:27:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-12 23:27:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2021-11-12 23:27:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 56 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 23:27:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-11-12 23:27:58,693 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 39 [2021-11-12 23:27:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:58,693 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-11-12 23:27:58,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 23:27:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-11-12 23:27:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 23:27:58,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:58,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:58,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:58,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-12 23:27:59,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:59,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:59,318 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1894170587, now seen corresponding path program 4 times [2021-11-12 23:27:59,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:59,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49920168] [2021-11-12 23:27:59,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:27:59,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:59,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:59,320 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:59,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:27:59,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:27:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:59,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:27:59,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:27:59,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:28:00,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:00,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49920168] [2021-11-12 23:28:00,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49920168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:00,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [444484447] [2021-11-12 23:28:00,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:28:00,467 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:00,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:00,474 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:00,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:28:00,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:28:00,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:00,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:28:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:28:01,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:28:11,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [444484447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:11,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950136491] [2021-11-12 23:28:11,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:28:11,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:11,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:28:11,889 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:28:11,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 23:28:11,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:28:11,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:28:11,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:28:13,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:29:12,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950136491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:12,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:29:12,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15, 15, 14, 15] total 62 [2021-11-12 23:29:12,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362461137] [2021-11-12 23:29:12,599 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:29:12,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-12 23:29:12,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-12 23:29:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=3271, Unknown=18, NotChecked=0, Total=3782 [2021-11-12 23:29:12,603 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 17 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-12 23:29:36,732 WARN L227 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 87 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:29:52,373 WARN L227 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 62 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:29:55,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:07,421 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 65 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:30:18,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:20,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:40,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:40,596 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2021-11-12 23:30:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-12 23:30:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 17 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) Word has length 41 [2021-11-12 23:30:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:40,604 INFO L225 Difference]: With dead ends: 129 [2021-11-12 23:30:40,604 INFO L226 Difference]: Without dead ends: 77 [2021-11-12 23:30:40,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 134.2s TimeCoverageRelationStatistics Valid=1116, Invalid=7236, Unknown=20, NotChecked=0, Total=8372 [2021-11-12 23:30:40,607 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 171 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 221 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19410.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.55ms SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 20202.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:40,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 446 Invalid, 1087 Unknown, 0 Unchecked, 10.55ms Time], IncrementalHoareTripleChecker [221 Valid, 626 Invalid, 4 Unknown, 236 Unchecked, 20202.84ms Time] [2021-11-12 23:30:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-12 23:30:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2021-11-12 23:30:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.14) internal successors, (57), 51 states have internal predecessors, (57), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:30:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-11-12 23:30:40,625 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 41 [2021-11-12 23:30:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:40,625 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-11-12 23:30:40,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 17 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-12 23:30:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-11-12 23:30:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 23:30:40,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:40,628 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:40,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:40,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:41,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-12 23:30:41,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:41,250 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:41,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2024152244, now seen corresponding path program 1 times [2021-11-12 23:30:41,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:41,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799856418] [2021-11-12 23:30:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:41,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:41,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:41,252 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:41,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:30:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:41,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:41,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:30:41,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:30:42,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:42,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799856418] [2021-11-12 23:30:42,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799856418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:42,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1717471173] [2021-11-12 23:30:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:42,405 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:42,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:30:42,406 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:30:42,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:30:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:42,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:30:42,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:30:43,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1717471173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:43,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632640221] [2021-11-12 23:30:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:43,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:43,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:43,051 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:43,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 23:30:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:43,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:43,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:30:43,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:30:43,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632640221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:43,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:30:43,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6, 9, 6, 9] total 13 [2021-11-12 23:30:43,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526625760] [2021-11-12 23:30:43,739 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:43,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:30:43,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:30:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:30:43,741 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:30:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:44,160 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-11-12 23:30:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:30:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 49 [2021-11-12 23:30:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:44,167 INFO L225 Difference]: With dead ends: 68 [2021-11-12 23:30:44,167 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:30:44,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 268 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:30:44,171 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 378.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 409.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:44,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 149 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 409.57ms Time] [2021-11-12 23:30:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:30:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:30:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:30:44,173 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-11-12 23:30:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:44,173 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:30:44,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:30:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:30:44,174 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:30:44,177 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:30:44,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:44,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:44,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:44,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:44,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:31:07,855 WARN L227 SmtUtils]: Spent 20.21s on a formula simplification. DAG size of input: 227 DAG size of output: 70 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 23:31:07,862 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 23:31:07,862 INFO L858 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2021-11-12 23:31:07,862 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-11-12 23:31:07,863 INFO L854 garLoopResultBuilder]: At program point L38-1(lines 38 47) the Hoare annotation is: (and (bvule |ULTIMATE.start_main_~A~0#1| (_ bv5 32)) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) [2021-11-12 23:31:07,863 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 37) the Hoare annotation is: (let ((.cse7 (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|))) (let ((.cse1 (bvule |ULTIMATE.start_main_~r~0#1| (_ bv5 32))) (.cse3 (= |ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse5 (bvule |ULTIMATE.start_main_~A~0#1| (_ bv5 32))) (.cse0 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse6 (= |ULTIMATE.start_main_~A~0#1| (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul (_ bv4 32) .cse7)))) (.cse4 (= (bvadd |ULTIMATE.start_main_~r~0#1| .cse7) |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32)))) (or (and (= |ULTIMATE.start_main_~b~0#1| (_ bv1 32)) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|) .cse0 .cse1 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|) .cse2) (and .cse3 (= |ULTIMATE.start_main_~b~0#1| (_ bv2 32)) .cse0 .cse1 .cse4 .cse2) (and .cse3 .cse5 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|)) .cse0 .cse6 (bvuge |ULTIMATE.start_main_~r~0#1| (_ bv2 32)) .cse4 .cse2) (and .cse3 .cse5 .cse0 .cse6 (bvuge |ULTIMATE.start_main_~r~0#1| (_ bv4 32)) .cse4 .cse2 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv8 32) |ULTIMATE.start_main_~B~0#1|)))))) [2021-11-12 23:31:07,863 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-12 23:31:07,863 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 23:31:07,863 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-12 23:31:07,863 INFO L861 garLoopResultBuilder]: At program point L49(lines 25 50) the Hoare annotation is: true [2021-11-12 23:31:07,863 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-12 23:31:07,863 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 46) no Hoare annotation was computed. [2021-11-12 23:31:07,864 INFO L858 garLoopResultBuilder]: For program point L43-2(lines 25 50) no Hoare annotation was computed. [2021-11-12 23:31:07,864 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse5 (bvudiv |ULTIMATE.start_main_~b~0#1| (_ bv2 32))) (.cse9 (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|))) (let ((.cse1 (= |ULTIMATE.start_main_~A~0#1| (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul (_ bv4 32) .cse9)))) (.cse6 (bvmul (_ bv2 32) (bvmul |ULTIMATE.start_main_~q~0#1| .cse5))) (.cse4 (bvneg |ULTIMATE.start_main_~b~0#1|)) (.cse8 (= |ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse0 (bvule |ULTIMATE.start_main_~A~0#1| (_ bv5 32))) (.cse3 (= (bvadd |ULTIMATE.start_main_~r~0#1| .cse9) |ULTIMATE.start_main_~A~0#1|)) (.cse7 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32)))) (or (let ((.cse2 (bvudiv .cse5 (_ bv2 32)))) (and .cse0 .cse1 (not (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~b~0#1|)) (= |ULTIMATE.start_main_~B~0#1| .cse2) .cse3 (= |ULTIMATE.start_main_~A~0#1| (bvadd .cse4 |ULTIMATE.start_main_~r~0#1| (bvmul (_ bv2 32) .cse5) .cse6)) .cse7 (= |ULTIMATE.start_main_~A~0#1| (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul (_ bv2 32) .cse2) (bvneg .cse5) (bvmul (_ bv4 32) (bvmul |ULTIMATE.start_main_~q~0#1| .cse2)))))) (and .cse8 .cse0 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32)) .cse1 (bvuge |ULTIMATE.start_main_~r~0#1| (_ bv4 32)) .cse3 .cse7 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv8 32) |ULTIMATE.start_main_~B~0#1|))) (and (= .cse5 |ULTIMATE.start_main_~B~0#1|) .cse0 (= (bvadd |ULTIMATE.start_main_~r~0#1| .cse6) |ULTIMATE.start_main_~A~0#1|) .cse3 (= |ULTIMATE.start_main_~B~0#1| (bvudiv (bvudiv (bvmul |ULTIMATE.start_main_~b~0#1| (_ bv2 32)) (_ bv2 32)) (_ bv2 32))) .cse7) (and .cse0 (= (bvudiv (bvudiv (bvmul |ULTIMATE.start_main_~b~0#1| (_ bv4 32)) (_ bv2 32)) (_ bv2 32)) |ULTIMATE.start_main_~B~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|) .cse3 .cse7) (and (bvuge (bvadd (bvmul .cse4 (_ bv4294967295 32)) |ULTIMATE.start_main_~r~0#1|) (_ bv4 32)) .cse8 .cse0 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|)) .cse3 .cse7 (= |ULTIMATE.start_main_~q~0#1| (_ bv1 32)))))) [2021-11-12 23:31:07,864 INFO L858 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2021-11-12 23:31:07,864 INFO L858 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-11-12 23:31:07,864 INFO L858 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-11-12 23:31:07,864 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-11-12 23:31:07,864 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-11-12 23:31:07,864 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-11-12 23:31:07,864 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-11-12 23:31:07,864 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-12 23:31:07,867 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2021-11-12 23:31:07,868 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:31:07,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:31:07 BoogieIcfgContainer [2021-11-12 23:31:07,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:31:07,883 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:31:07,883 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:31:07,884 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:31:07,884 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:52" (3/4) ... [2021-11-12 23:31:07,887 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 23:31:07,893 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-12 23:31:07,897 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-12 23:31:07,897 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-12 23:31:07,898 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-12 23:31:07,898 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 23:31:07,936 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 23:31:07,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:31:07,937 INFO L158 Benchmark]: Toolchain (without parser) took 496363.29ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 34.1MB in the beginning and 55.6MB in the end (delta: -21.5MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. [2021-11-12 23:31:07,937 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 56.6MB. Free memory is still 36.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:31:07,938 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.89ms. Allocated memory is still 56.6MB. Free memory was 33.9MB in the beginning and 37.3MB in the end (delta: -3.5MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2021-11-12 23:31:07,938 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.46ms. Allocated memory is still 56.6MB. Free memory was 37.2MB in the beginning and 35.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:31:07,938 INFO L158 Benchmark]: Boogie Preprocessor took 24.29ms. Allocated memory is still 56.6MB. Free memory was 35.8MB in the beginning and 34.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:31:07,939 INFO L158 Benchmark]: RCFGBuilder took 468.56ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 34.5MB in the beginning and 59.3MB in the end (delta: -24.8MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2021-11-12 23:31:07,939 INFO L158 Benchmark]: TraceAbstraction took 495502.14ms. Allocated memory is still 77.6MB. Free memory was 58.6MB in the beginning and 22.9MB in the end (delta: 35.7MB). Peak memory consumption was 41.4MB. Max. memory is 16.1GB. [2021-11-12 23:31:07,940 INFO L158 Benchmark]: Witness Printer took 53.00ms. Allocated memory is still 77.6MB. Free memory was 22.9MB in the beginning and 55.6MB in the end (delta: -32.7MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2021-11-12 23:31:07,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 56.6MB. Free memory is still 36.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.89ms. Allocated memory is still 56.6MB. Free memory was 33.9MB in the beginning and 37.3MB in the end (delta: -3.5MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.46ms. Allocated memory is still 56.6MB. Free memory was 37.2MB in the beginning and 35.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.29ms. Allocated memory is still 56.6MB. Free memory was 35.8MB in the beginning and 34.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 468.56ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 34.5MB in the beginning and 59.3MB in the end (delta: -24.8MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * TraceAbstraction took 495502.14ms. Allocated memory is still 77.6MB. Free memory was 58.6MB in the beginning and 22.9MB in the end (delta: 35.7MB). Peak memory consumption was 41.4MB. Max. memory is 16.1GB. * Witness Printer took 53.00ms. Allocated memory is still 77.6MB. Free memory was 22.9MB in the beginning and 55.6MB in the end (delta: -32.7MB). Peak memory consumption was 4.3MB. 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 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 495.4s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 334.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 23.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 699 SdHoareTripleChecker+Valid, 87776.54ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 698 mSDsluCounter, 1483 SdHoareTripleChecker+Invalid, 85723.74ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 236 IncrementalHoareTripleChecker+Unchecked, 1299 mSDsCounter, 747 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2015 IncrementalHoareTripleChecker+Invalid, 3022 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 747 mSolverCounterUnsat, 184 mSDtfsCounter, 2015 mSolverCounterSat, 43.80ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1397 GetRequests, 1123 SyntacticMatches, 26 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3963 ImplicationChecksByTransitivity, 354.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=6, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 75 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 77 PreInvPairs, 118 NumberOfFragments, 345 HoareAnnotationTreeSize, 77 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 7261 FormulaSimplificationTreeSizeReductionInter, 23.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 131.2s InterpolantComputationTime, 660 NumberOfCodeBlocks, 660 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1278 ConstructedInterpolants, 16 QuantifiedInterpolants, 9915 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1419 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 42 InterpolantComputations, 6 PerfectInterpolantSequences, 739/1304 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((b == 1bv32 && r == A) && q == 0bv32) && ~bvule32(r, 5bv32)) && b == B) && cond == 1bv32) || (((((B == 1bv32 && b == 2bv32) && q == 0bv32) && ~bvule32(r, 5bv32)) && ~bvadd64(r, ~bvmul32(q, b)) == A) && cond == 1bv32)) || (((((((B == 1bv32 && ~bvule32(A, 5bv32)) && b == ~bvmul32(4bv32, B)) && q == 0bv32) && A == ~bvadd64(r, ~bvmul32(4bv32, ~bvmul32(q, b)))) && ~bvuge32(r, 2bv32)) && ~bvadd64(r, ~bvmul32(q, b)) == A) && cond == 1bv32)) || (((((((B == 1bv32 && ~bvule32(A, 5bv32)) && q == 0bv32) && A == ~bvadd64(r, ~bvmul32(4bv32, ~bvmul32(q, b)))) && ~bvuge32(r, 4bv32)) && ~bvadd64(r, ~bvmul32(q, b)) == A) && cond == 1bv32) && b == ~bvmul32(8bv32, B)) RESULT: Ultimate proved your program to be correct! [2021-11-12 23:31:08,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6732a0-666b-49fe-85e3-1434c4aea887/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE