./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c --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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:16,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:16,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:16,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:16,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:16,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:16,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:16,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:16,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:16,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:16,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:16,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:16,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:16,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:16,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:16,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:16,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:16,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:16,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:16,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:16,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:16,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:16,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:16,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:16,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:16,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:16,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:16,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:16,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:16,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:16,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:16,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:16,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:16,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:16,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:16,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:16,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:16,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:16,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:16,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:16,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:16,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:49:17,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:17,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:17,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:17,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:17,016 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:17,016 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:17,017 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:17,017 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:49:17,017 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:17,017 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:17,024 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:49:17,025 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:49:17,025 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:17,025 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:49:17,025 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:49:17,026 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:49:17,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:17,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:49:17,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:49:17,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:49:17,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:17,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:49:17,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:17,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:49:17,028 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:17,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:49:17,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:49:17,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:17,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:49:17,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:17,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:17,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:17,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:17,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:17,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:49:17,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:49:17,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:49:17,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:49:17,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:17,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:17,032 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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2021-11-12 22:49:17,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:17,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:17,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:17,363 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:17,364 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:17,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2021-11-12 22:49:17,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data/c2e51919c/a5203119e8ee4928bac331042c258256/FLAGdcf54263e [2021-11-12 22:49:17,883 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:17,883 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2021-11-12 22:49:17,890 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data/c2e51919c/a5203119e8ee4928bac331042c258256/FLAGdcf54263e [2021-11-12 22:49:18,281 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data/c2e51919c/a5203119e8ee4928bac331042c258256 [2021-11-12 22:49:18,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:18,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:18,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:18,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:18,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:18,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462c1119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18, skipping insertion in model container [2021-11-12 22:49:18,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:18,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:18,490 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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2021-11-12 22:49:18,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:18,521 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:49:18,533 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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2021-11-12 22:49:18,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:18,558 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:49:18,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18 WrapperNode [2021-11-12 22:49:18,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:18,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:18,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:49:18,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:49:18,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:18,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:49:18,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:49:18,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:49:18,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:49:18,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:49:18,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:49:18,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:49:18,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (1/1) ... [2021-11-12 22:49:18,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:18,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:49:18,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:49:18,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:49:18,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:49:18,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:49:18,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:49:18,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:49:18,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:49:18,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:49:18,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:49:18,882 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:49:18,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:18 BoogieIcfgContainer [2021-11-12 22:49:18,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:49:18,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:49:18,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:49:18,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:49:18,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:49:18" (1/3) ... [2021-11-12 22:49:18,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f754c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:18, skipping insertion in model container [2021-11-12 22:49:18,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:18" (2/3) ... [2021-11-12 22:49:18,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f754c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:18, skipping insertion in model container [2021-11-12 22:49:18,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:18" (3/3) ... [2021-11-12 22:49:18,894 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2021-11-12 22:49:18,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:49:18,899 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:49:18,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:49:18,955 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 22:49:18,955 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:49:18,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:49:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 22:49:18,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:18,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 22:49:18,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2021-11-12 22:49:18,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:18,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585559593] [2021-11-12 22:49:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:18,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:19,157 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 22:49:19,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:19,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585559593] [2021-11-12 22:49:19,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585559593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:19,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:19,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:49:19,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725983157] [2021-11-12 22:49:19,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:19,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:49:19,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:49:19,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:49:19,202 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 22:49:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:19,252 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2021-11-12 22:49:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:49:19,255 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2021-11-12 22:49:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:19,262 INFO L225 Difference]: With dead ends: 35 [2021-11-12 22:49:19,262 INFO L226 Difference]: Without dead ends: 16 [2021-11-12 22:49:19,266 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 22:49:19,270 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:19,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 23.83ms Time] [2021-11-12 22:49:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-12 22:49:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-12 22:49:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 22:49:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-11-12 22:49:19,316 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2021-11-12 22:49:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:19,316 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-12 22:49:19,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 22:49:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-11-12 22:49:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 22:49:19,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:19,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:19,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:49:19,319 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2021-11-12 22:49:19,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:19,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977496851] [2021-11-12 22:49:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:19,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:19,443 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 22:49:19,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:19,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977496851] [2021-11-12 22:49:19,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977496851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:19,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:19,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:19,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40950987] [2021-11-12 22:49:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:19,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:49:19,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:49:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:49:19,447 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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 22:49:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:19,483 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-12 22:49:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:49:19,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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 22:49:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:19,485 INFO L225 Difference]: With dead ends: 27 [2021-11-12 22:49:19,485 INFO L226 Difference]: Without dead ends: 18 [2021-11-12 22:49:19,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:49:19,487 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:19,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 26.40ms Time] [2021-11-12 22:49:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-12 22:49:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-12 22:49:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 22:49:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-12 22:49:19,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2021-11-12 22:49:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:19,496 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-12 22:49:19,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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 22:49:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-12 22:49:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 22:49:19,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:19,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:19,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:49:19,497 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:19,498 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2021-11-12 22:49:19,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:19,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340624099] [2021-11-12 22:49:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:19,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:19,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:49:19,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319251740] [2021-11-12 22:49:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:19,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:49:19,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:49:19,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:49:19,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:49:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:49:19,586 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:49:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:49:19,642 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 22:49:19,643 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:49:19,644 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:49:19,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:49:19,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:49:19,851 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-12 22:49:19,854 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:49:19,863 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 22:49:19,866 INFO L158 Benchmark]: Toolchain (without parser) took 1579.51ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 47.0MB in the end (delta: 34.0MB). Peak memory consumption was 33.0MB. Max. memory is 16.1GB. [2021-11-12 22:49:19,868 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory was 88.8MB in the beginning and 88.8MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:49:19,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.75ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 91.4MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:49:19,869 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.01ms. Allocated memory is still 117.4MB. Free memory was 91.4MB in the beginning and 89.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:49:19,870 INFO L158 Benchmark]: Boogie Preprocessor took 22.90ms. Allocated memory is still 117.4MB. Free memory was 89.9MB in the beginning and 88.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:49:19,870 INFO L158 Benchmark]: RCFGBuilder took 266.98ms. Allocated memory is still 117.4MB. Free memory was 88.4MB in the beginning and 78.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:49:19,871 INFO L158 Benchmark]: TraceAbstraction took 978.83ms. Allocated memory is still 117.4MB. Free memory was 78.0MB in the beginning and 47.0MB in the end (delta: 31.0MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-12 22:49:19,874 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory was 88.8MB in the beginning and 88.8MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.75ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 91.4MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.01ms. Allocated memory is still 117.4MB. Free memory was 91.4MB in the beginning and 89.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.90ms. Allocated memory is still 117.4MB. Free memory was 89.9MB in the beginning and 88.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 266.98ms. Allocated memory is still 117.4MB. Free memory was 88.4MB in the beginning and 78.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 978.83ms. Allocated memory is still 117.4MB. Free memory was 78.0MB in the beginning and 47.0MB in the end (delta: 31.0MB). Peak memory consumption was 31.5MB. 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 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 22:49:19,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:22,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:22,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:22,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:22,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:22,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:22,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:22,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:22,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:22,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:22,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:22,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:22,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:22,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:22,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:22,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:22,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:22,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:22,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:22,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:22,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:22,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:22,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:22,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:22,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:22,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:22,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:22,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:22,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:22,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:22,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:22,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:22,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:22,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:22,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:22,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:22,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:22,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:22,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:22,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:22,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:22,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:49:22,595 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:22,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:22,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:22,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:22,597 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:22,597 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:22,598 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:22,598 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:22,598 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:22,598 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:22,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:22,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:49:22,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:49:22,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:22,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:49:22,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:22,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:49:22,602 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:22,602 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:49:22,602 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:49:22,602 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:49:22,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:49:22,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:22,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:49:22,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:22,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:49:22,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:22,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:22,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:22,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:22,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:49:22,605 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:49:22,605 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:49:22,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:49:22,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:22,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:22,606 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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2021-11-12 22:49:23,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:23,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:23,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:23,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:23,045 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:23,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2021-11-12 22:49:23,117 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data/7a9091898/d72a1d73649a4887a5ed10643d6eee54/FLAG79685f94b [2021-11-12 22:49:23,630 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:23,633 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2021-11-12 22:49:23,641 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data/7a9091898/d72a1d73649a4887a5ed10643d6eee54/FLAG79685f94b [2021-11-12 22:49:23,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/data/7a9091898/d72a1d73649a4887a5ed10643d6eee54 [2021-11-12 22:49:23,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:23,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:23,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:23,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:23,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:23,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:23" (1/1) ... [2021-11-12 22:49:23,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c1c600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:23, skipping insertion in model container [2021-11-12 22:49:23,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:23" (1/1) ... [2021-11-12 22:49:24,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:24,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:24,153 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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2021-11-12 22:49:24,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:24,197 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:49:24,225 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_28416d38-85d0-4feb-86c6-c8d3f659a0ca/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2021-11-12 22:49:24,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:24,289 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:49:24,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24 WrapperNode [2021-11-12 22:49:24,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:24,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:24,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:49:24,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:49:24,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:24,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:49:24,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:49:24,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:49:24,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:49:24,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:49:24,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:49:24,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:49:24,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (1/1) ... [2021-11-12 22:49:24,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:24,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:49:24,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:49:24,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:49:24,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:49:24,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:49:24,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:49:24,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:49:24,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:49:24,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:49:26,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:49:26,932 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:49:26,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:26 BoogieIcfgContainer [2021-11-12 22:49:26,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:49:26,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:49:26,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:49:26,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:49:26,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:49:23" (1/3) ... [2021-11-12 22:49:26,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebd199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:26, skipping insertion in model container [2021-11-12 22:49:26,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:24" (2/3) ... [2021-11-12 22:49:26,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebd199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:26, skipping insertion in model container [2021-11-12 22:49:26,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:26" (3/3) ... [2021-11-12 22:49:26,942 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2021-11-12 22:49:26,947 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:49:26,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:49:26,992 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:49:26,999 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 22:49:26,999 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:49:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:49:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 22:49:27,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:27,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:27,019 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:27,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2021-11-12 22:49:27,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:49:27,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441962414] [2021-11-12 22:49:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:27,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:49:27,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:49:27,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:49:27,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:49:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:27,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:49:27,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:49:27,454 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 22:49:27,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:27,488 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 22:49:27,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:49:27,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441962414] [2021-11-12 22:49:27,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441962414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:27,490 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:27,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:49:27,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67655925] [2021-11-12 22:49:27,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:27,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:49:27,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:49:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:49:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:49:27,540 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 22:49:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:27,566 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2021-11-12 22:49:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:49:27,568 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 22:49:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:27,575 INFO L225 Difference]: With dead ends: 40 [2021-11-12 22:49:27,575 INFO L226 Difference]: Without dead ends: 17 [2021-11-12 22:49:27,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 22:49:27,584 INFO L933 BasicCegarLoop]: 27 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, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:27,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 2.82ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:49:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-12 22:49:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-12 22:49:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 22:49:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-12 22:49:27,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2021-11-12 22:49:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:27,631 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-12 22:49:27,631 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 22:49:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-12 22:49:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:49:27,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:27,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:27,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:49:27,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:49:27,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:27,851 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2021-11-12 22:49:27,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:49:27,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562607310] [2021-11-12 22:49:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:27,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:49:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:49:27,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:49:27,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:49:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:28,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:49:28,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:49:28,149 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 22:49:28,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:28,226 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 22:49:28,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:49:28,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562607310] [2021-11-12 22:49:28,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562607310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:28,227 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:28,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:49:28,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759291549] [2021-11-12 22:49:28,227 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:28,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:49:28,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:49:28,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:49:28,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:49:28,230 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 22:49:31,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:33,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:35,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:37,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:41,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:43,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:45,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:46,042 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-11-12 22:49:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:49:46,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 22:49:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:46,044 INFO L225 Difference]: With dead ends: 43 [2021-11-12 22:49:46,044 INFO L226 Difference]: Without dead ends: 34 [2021-11-12 22:49:46,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:49:46,047 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17275.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17765.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:46,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 76 Invalid, 24 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 17765.66ms Time] [2021-11-12 22:49:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-12 22:49:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-12 22:49:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:49:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2021-11-12 22:49:46,064 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 8 [2021-11-12 22:49:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:46,064 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2021-11-12 22:49:46,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 22:49:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2021-11-12 22:49:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:49:46,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:46,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:46,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:49:46,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:49:46,271 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2021-11-12 22:49:46,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:49:46,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298055177] [2021-11-12 22:49:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:46,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:49:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:49:46,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:49:46,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:49:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:49:46,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:49:46,845 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 22:49:46,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:57,483 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 22:49:57,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:49:57,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298055177] [2021-11-12 22:49:57,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298055177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:57,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:57,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 22:49:57,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632231528] [2021-11-12 22:49:57,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:57,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:49:57,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:49:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:49:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:49:57,487 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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 22:49:59,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:01,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:06,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:08,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:10,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:13,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:15,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:17,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:19,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:21,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:23,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:26,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:28,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:28,971 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-12 22:50:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:50:29,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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 8 [2021-11-12 22:50:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:29,080 INFO L225 Difference]: With dead ends: 44 [2021-11-12 22:50:29,080 INFO L226 Difference]: Without dead ends: 42 [2021-11-12 22:50:29,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:50:29,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28639.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.57ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29067.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:29,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 43 Unknown, 0 Unchecked, 3.57ms Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 29067.78ms Time] [2021-11-12 22:50:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-12 22:50:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-12 22:50:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:50:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-12 22:50:29,097 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 8 [2021-11-12 22:50:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:29,098 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-12 22:50:29,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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 22:50:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-12 22:50:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 22:50:29,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:29,099 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:29,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:29,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:29,303 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2021-11-12 22:50:29,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:29,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015326594] [2021-11-12 22:50:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:29,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:29,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:29,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:29,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:50:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:50:30,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:31,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:38,246 WARN L838 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from false [2021-11-12 22:50:40,284 WARN L860 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from true [2021-11-12 22:51:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:04,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:04,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015326594] [2021-11-12 22:51:04,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015326594] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:04,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:04,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-11-12 22:51:04,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272941468] [2021-11-12 22:51:04,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:04,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:51:04,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:04,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:51:04,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=56, Unknown=2, NotChecked=14, Total=90 [2021-11-12 22:51:04,791 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 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 22:51:07,913 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:11,098 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:13,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:13,429 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-12 22:51:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:51:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-12 22:51:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:13,542 INFO L225 Difference]: With dead ends: 42 [2021-11-12 22:51:13,542 INFO L226 Difference]: Without dead ends: 40 [2021-11-12 22:51:13,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=22, Invalid=70, Unknown=2, NotChecked=16, Total=110 [2021-11-12 22:51:13,544 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7674.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 7856.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:13,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 62 Invalid, 42 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 3 Unknown, 32 Unchecked, 7856.30ms Time] [2021-11-12 22:51:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-12 22:51:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-12 22:51:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:51:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-12 22:51:13,563 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 13 [2021-11-12 22:51:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:13,564 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-12 22:51:13,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 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 22:51:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-12 22:51:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-12 22:51:13,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:13,565 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:13,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:13,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:13,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:13,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times [2021-11-12 22:51:13,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:13,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167543473] [2021-11-12 22:51:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:13,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:13,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:13,773 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:13,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:51:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:51:15,153 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:51:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:51:16,603 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 22:51:16,603 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:51:16,604 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:51:16,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 22:51:16,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:16,809 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-11-12 22:51:16,812 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:51:16,826 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 22:51:16,832 INFO L158 Benchmark]: Toolchain (without parser) took 112841.63ms. Allocated memory was 56.6MB in the beginning and 79.7MB in the end (delta: 23.1MB). Free memory was 34.3MB in the beginning and 39.9MB in the end (delta: -5.6MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2021-11-12 22:51:16,832 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 56.6MB. Free memory was 36.5MB in the beginning and 36.5MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:51:16,833 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.60ms. Allocated memory was 56.6MB in the beginning and 79.7MB in the end (delta: 23.1MB). Free memory was 34.1MB in the beginning and 62.3MB in the end (delta: -28.2MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. [2021-11-12 22:51:16,833 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.28ms. Allocated memory is still 79.7MB. Free memory was 62.1MB in the beginning and 60.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:51:16,834 INFO L158 Benchmark]: Boogie Preprocessor took 38.51ms. Allocated memory is still 79.7MB. Free memory was 60.4MB in the beginning and 59.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:51:16,835 INFO L158 Benchmark]: RCFGBuilder took 2538.99ms. Allocated memory is still 79.7MB. Free memory was 59.1MB in the beginning and 48.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:51:16,836 INFO L158 Benchmark]: TraceAbstraction took 109895.41ms. Allocated memory is still 79.7MB. Free memory was 47.7MB in the beginning and 39.9MB in the end (delta: 7.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-11-12 22:51:16,839 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 56.6MB. Free memory was 36.5MB in the beginning and 36.5MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.60ms. Allocated memory was 56.6MB in the beginning and 79.7MB in the end (delta: 23.1MB). Free memory was 34.1MB in the beginning and 62.3MB in the end (delta: -28.2MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.28ms. Allocated memory is still 79.7MB. Free memory was 62.1MB in the beginning and 60.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.51ms. Allocated memory is still 79.7MB. Free memory was 60.4MB in the beginning and 59.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2538.99ms. Allocated memory is still 79.7MB. Free memory was 59.1MB in the beginning and 48.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 109895.41ms. Allocated memory is still 79.7MB. Free memory was 47.7MB in the beginning and 39.9MB in the end (delta: 7.8MB). Peak memory consumption was 8.9MB. 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 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 22:51:17,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28416d38-85d0-4feb-86c6-c8d3f659a0ca/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: ERROR: ExceptionOrErrorResult: NullPointerException: null