./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs --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 7f42b09f9bbe79e0765dd760dc5dae991687d89f ............................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs --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 7f42b09f9bbe79e0765dd760dc5dae991687d89f ............................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:09:09,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:09:09,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:09:09,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:09:09,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:09:09,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:09:09,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:09:09,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:09:09,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:09:09,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:09:09,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:09:09,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:09:09,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:09:09,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:09:09,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:09:09,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:09:09,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:09:09,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:09:09,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:09:09,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:09:09,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:09:09,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:09:09,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:09:09,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:09:09,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:09:09,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:09:09,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:09:09,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:09:09,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:09:09,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:09:09,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:09:09,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:09:09,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:09:09,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:09:09,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:09:09,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:09:09,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:09:09,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:09:09,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:09:09,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:09:09,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:09:09,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:09:09,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:09:09,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:09:09,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:09:09,372 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:09:09,372 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:09:09,372 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:09:09,373 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:09:09,373 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:09:09,373 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:09:09,373 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:09:09,373 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:09:09,374 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:09:09,376 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:09:09,377 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:09:09,377 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:09:09,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:09:09,378 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:09:09,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:09:09,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:09:09,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:09:09,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:09:09,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:09:09,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:09:09,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:09:09,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:09:09,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:09:09,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:09:09,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:09:09,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:09:09,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:09:09,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:09,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:09:09,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:09:09,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:09:09,382 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:09:09,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:09:09,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:09:09,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:09:09,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:09:09,384 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_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f42b09f9bbe79e0765dd760dc5dae991687d89f [2021-10-16 03:09:09,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:09:09,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:09:09,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:09:09,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:09:09,744 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:09:09,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c [2021-10-16 03:09:09,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data/1a0a7cb43/aa31ca7ef75842c78863c59f4cbd3d18/FLAGbc7147415 [2021-10-16 03:09:10,388 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:09:10,388 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c [2021-10-16 03:09:10,394 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data/1a0a7cb43/aa31ca7ef75842c78863c59f4cbd3d18/FLAGbc7147415 [2021-10-16 03:09:10,750 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data/1a0a7cb43/aa31ca7ef75842c78863c59f4cbd3d18 [2021-10-16 03:09:10,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:09:10,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:09:10,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:10,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:09:10,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:09:10,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:10,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4137baa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10, skipping insertion in model container [2021-10-16 03:09:10,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:10,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:09:10,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:09:10,923 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_c40c9fca-eb84-4240-9656-c99c443997dd/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c[712,725] [2021-10-16 03:09:10,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:10,951 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:09:10,963 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_c40c9fca-eb84-4240-9656-c99c443997dd/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c[712,725] [2021-10-16 03:09:10,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:10,981 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:09:10,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10 WrapperNode [2021-10-16 03:09:10,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:10,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:10,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:09:10,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:09:10,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:11,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:09:11,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:09:11,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:09:11,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:09:11,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:09:11,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:09:11,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:09:11,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (1/1) ... [2021-10-16 03:09:11,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:11,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:09:11,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:09:11,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:09:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:09:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:09:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:09:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:09:11,380 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:09:11,380 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-16 03:09:11,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:11 BoogieIcfgContainer [2021-10-16 03:09:11,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:09:11,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:09:11,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:09:11,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:09:11,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:09:10" (1/3) ... [2021-10-16 03:09:11,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af9738c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:11, skipping insertion in model container [2021-10-16 03:09:11,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:10" (2/3) ... [2021-10-16 03:09:11,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af9738c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:11, skipping insertion in model container [2021-10-16 03:09:11,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:11" (3/3) ... [2021-10-16 03:09:11,393 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound50.c [2021-10-16 03:09:11,399 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:09:11,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 03:09:11,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:09:11,496 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, mConcurrency=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 [2021-10-16 03:09:11,496 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 03:09:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:09:11,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:11,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 03:09:11,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:09:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash 71331668, now seen corresponding path program 1 times [2021-10-16 03:09:11,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:11,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992740309] [2021-10-16 03:09:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:11,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:09:11,674 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:09:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:09:11,717 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 03:09:11,719 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:09:11,721 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:09:11,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:09:11,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:09:11,730 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:09:11,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:09:11 BoogieIcfgContainer [2021-10-16 03:09:11,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:09:11,752 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:09:11,753 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:09:11,753 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:09:11,753 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:11" (3/4) ... [2021-10-16 03:09:11,756 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:09:11,757 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:09:11,762 INFO L168 Benchmark]: Toolchain (without parser) took 1003.54 ms. Allocated memory is still 98.6 MB. Free memory was 77.0 MB in the beginning and 56.8 MB in the end (delta: 20.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:11,762 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:09:11,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.74 ms. Allocated memory is still 98.6 MB. Free memory was 76.6 MB in the beginning and 66.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:11,766 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.08 ms. Allocated memory is still 98.6 MB. Free memory was 66.9 MB in the beginning and 65.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:11,767 INFO L168 Benchmark]: Boogie Preprocessor took 24.27 ms. Allocated memory is still 98.6 MB. Free memory was 65.6 MB in the beginning and 64.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:09:11,768 INFO L168 Benchmark]: RCFGBuilder took 335.53 ms. Allocated memory is still 98.6 MB. Free memory was 64.4 MB in the beginning and 71.4 MB in the end (delta: -7.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:11,769 INFO L168 Benchmark]: TraceAbstraction took 366.39 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 57.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:11,775 INFO L168 Benchmark]: Witness Printer took 4.15 ms. Allocated memory is still 98.6 MB. Free memory was 57.1 MB in the beginning and 56.8 MB in the end (delta: 291.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:09:11,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 226.74 ms. Allocated memory is still 98.6 MB. Free memory was 76.6 MB in the beginning and 66.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.08 ms. Allocated memory is still 98.6 MB. Free memory was 66.9 MB in the beginning and 65.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.27 ms. Allocated memory is still 98.6 MB. Free memory was 65.6 MB in the beginning and 64.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 335.53 ms. Allocated memory is still 98.6 MB. Free memory was 64.4 MB in the beginning and 71.4 MB in the end (delta: -7.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 366.39 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 57.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.15 ms. Allocated memory is still 98.6 MB. Free memory was 57.1 MB in the beginning and 56.8 MB in the end (delta: 291.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<50 [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 267.1ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 35.1ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.4ms SsaConstructionTime, 41.9ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-16 03:09:11,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:09:14,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:09:14,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:09:14,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:09:14,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:09:14,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:09:14,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:09:14,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:09:14,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:09:14,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:09:14,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:09:14,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:09:14,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:09:14,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:09:14,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:09:14,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:09:14,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:09:14,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:09:14,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:09:14,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:09:14,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:09:14,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:09:14,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:09:14,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:09:14,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:09:14,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:09:14,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:09:14,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:09:14,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:09:14,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:09:14,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:09:14,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:09:14,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:09:14,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:09:14,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:09:14,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:09:14,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:09:14,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:09:14,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:09:14,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:09:14,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:09:14,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 03:09:14,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:09:14,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:09:14,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:09:14,481 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:09:14,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:09:14,481 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:09:14,481 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:09:14,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:09:14,482 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:09:14,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:09:14,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:09:14,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:09:14,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:09:14,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:09:14,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:09:14,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:09:14,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:09:14,485 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:09:14,485 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:09:14,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:09:14,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:09:14,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:09:14,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:09:14,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:09:14,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:09:14,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:09:14,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:14,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:09:14,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:09:14,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:09:14,488 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:09:14,488 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:09:14,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:09:14,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:09:14,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:09:14,489 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_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f42b09f9bbe79e0765dd760dc5dae991687d89f [2021-10-16 03:09:14,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:09:14,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:09:14,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:09:14,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:09:14,960 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:09:14,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c [2021-10-16 03:09:15,037 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data/da66afdef/93075b51541c4d95b66afd50287082e0/FLAG476c26350 [2021-10-16 03:09:15,521 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:09:15,521 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c [2021-10-16 03:09:15,528 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data/da66afdef/93075b51541c4d95b66afd50287082e0/FLAG476c26350 [2021-10-16 03:09:15,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/data/da66afdef/93075b51541c4d95b66afd50287082e0 [2021-10-16 03:09:15,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:09:15,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:09:15,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:15,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:09:15,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:09:15,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:15" (1/1) ... [2021-10-16 03:09:15,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33940999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:15, skipping insertion in model container [2021-10-16 03:09:15,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:15" (1/1) ... [2021-10-16 03:09:15,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:09:15,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:09:16,062 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_c40c9fca-eb84-4240-9656-c99c443997dd/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c[712,725] [2021-10-16 03:09:16,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:16,091 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:09:16,104 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_c40c9fca-eb84-4240-9656-c99c443997dd/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c[712,725] [2021-10-16 03:09:16,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:16,125 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:09:16,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16 WrapperNode [2021-10-16 03:09:16,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:16,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:16,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:09:16,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:09:16,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:16,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:09:16,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:09:16,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:09:16,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:09:16,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:09:16,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:09:16,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:09:16,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (1/1) ... [2021-10-16 03:09:16,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:09:16,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:09:16,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:09:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:09:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:09:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:09:16,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:09:22,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:09:22,276 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-16 03:09:22,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:22 BoogieIcfgContainer [2021-10-16 03:09:22,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:09:22,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:09:22,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:09:22,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:09:22,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:09:15" (1/3) ... [2021-10-16 03:09:22,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5168963d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:22, skipping insertion in model container [2021-10-16 03:09:22,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:16" (2/3) ... [2021-10-16 03:09:22,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5168963d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:22, skipping insertion in model container [2021-10-16 03:09:22,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:22" (3/3) ... [2021-10-16 03:09:22,287 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound50.c [2021-10-16 03:09:22,294 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:09:22,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 03:09:22,352 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:09:22,358 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, mConcurrency=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 [2021-10-16 03:09:22,359 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 03:09:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:09:22,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:22,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:09:22,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:09:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-16 03:09:22,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:09:22,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449808581] [2021-10-16 03:09:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:22,411 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:09:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:09:22,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:09:22,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:09:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 03:09:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:09:47,574 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 ULTIMATE.start_main_~a~0) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse1 ULTIMATE.start_main_~a~0) .cse1)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))))) is different from false [2021-10-16 03:09:55,770 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 ULTIMATE.start_main_~a~0) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from false [2021-10-16 03:09:57,801 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 ULTIMATE.start_main_~a~0) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from true [2021-10-16 03:09:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:57,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:04,120 WARN L838 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) is different from false [2021-10-16 03:10:06,179 WARN L860 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) is different from true [2021-10-16 03:10:14,787 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) is different from false [2021-10-16 03:10:16,831 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) is different from true [2021-10-16 03:10:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:16,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:16,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449808581] [2021-10-16 03:10:16,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449808581] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:16,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:16,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-16 03:10:16,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968747873] [2021-10-16 03:10:16,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:10:16,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:10:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=13, Unknown=7, NotChecked=36, Total=72 [2021-10-16 03:10:16,862 INFO L87 Difference]: Start difference. First operand has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:20,604 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-10-16 03:10:22,650 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-10-16 03:10:24,697 WARN L838 $PredicateComparison]: unable to prove that (and (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) (= c_ULTIMATE.start_main_~r~0 (_ bv0 32)) (= c_ULTIMATE.start_main_~x~0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-10-16 03:10:26,753 WARN L860 $PredicateComparison]: unable to prove that (and (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) (= c_ULTIMATE.start_main_~r~0 (_ bv0 32)) (= c_ULTIMATE.start_main_~x~0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-10-16 03:10:28,813 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (and (not .cse0) (or (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse1 ULTIMATE.start_main_~a~0) .cse1)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and .cse0 (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse2 ULTIMATE.start_main_~a~0) .cse2)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))))))) is different from false [2021-10-16 03:10:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:39,132 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-10-16 03:10:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:10:39,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 03:10:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:39,158 INFO L225 Difference]: With dead ends: 37 [2021-10-16 03:10:39,158 INFO L226 Difference]: Without dead ends: 19 [2021-10-16 03:10:39,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28764.8ms TimeCoverageRelationStatistics Valid=22, Invalid=14, Unknown=12, NotChecked=84, Total=132 [2021-10-16 03:10:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-16 03:10:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-10-16 03:10:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-16 03:10:39,191 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2021-10-16 03:10:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:39,191 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-16 03:10:39,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-16 03:10:39,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:10:39,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:39,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:39,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:39,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:39,413 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:10:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:39,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1806862075, now seen corresponding path program 1 times [2021-10-16 03:10:39,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:39,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461650339] [2021-10-16 03:10:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:39,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:39,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:39,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:39,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:10:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:39,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:10:39,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:39,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:40,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:40,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461650339] [2021-10-16 03:10:40,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461650339] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:40,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:40,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 03:10:40,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736204348] [2021-10-16 03:10:40,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:10:40,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:10:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:10:40,071 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:42,631 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-16 03:10:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:10:42,632 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 03:10:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:42,633 INFO L225 Difference]: With dead ends: 19 [2021-10-16 03:10:42,633 INFO L226 Difference]: Without dead ends: 15 [2021-10-16 03:10:42,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:10:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-16 03:10:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-16 03:10:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-16 03:10:42,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2021-10-16 03:10:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:42,640 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-16 03:10:42,641 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-16 03:10:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:10:42,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:42,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:42,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:42,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:42,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:10:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:42,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1274494228, now seen corresponding path program 1 times [2021-10-16 03:10:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:42,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832123611] [2021-10-16 03:10:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:42,868 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:42,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:42,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:10:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 03:10:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:02,047 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)))) (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (not .cse0)))) is different from false [2021-10-16 03:11:04,113 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)))) (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (not .cse0)))) is different from true [2021-10-16 03:11:10,314 WARN L838 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) is different from false [2021-10-16 03:11:12,377 WARN L860 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) is different from true [2021-10-16 03:11:24,808 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))) (_ bv0 32))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) is different from false [2021-10-16 03:11:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:24,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:43,529 WARN L838 $PredicateComparison]: unable to prove that (or (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32))) is different from false [2021-10-16 03:11:45,592 WARN L860 $PredicateComparison]: unable to prove that (or (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32))) is different from true [2021-10-16 03:11:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:45,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:45,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832123611] [2021-10-16 03:11:45,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832123611] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:45,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:45,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-16 03:11:45,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916685203] [2021-10-16 03:11:45,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:11:45,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:11:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:11:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=4, Unknown=7, NotChecked=20, Total=42 [2021-10-16 03:11:45,630 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:49,887 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)))) (and (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and .cse1 (not .cse0))) (or .cse1 .cse0))) is different from false [2021-10-16 03:11:51,951 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)))) (and (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and .cse1 (not .cse0))) (or .cse1 .cse0))) is different from true [2021-10-16 03:11:54,018 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))) (_ bv0 32))) (not (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) is different from false [2021-10-16 03:11:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:56,221 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-10-16 03:11:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:11:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 03:11:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:56,223 INFO L225 Difference]: With dead ends: 19 [2021-10-16 03:11:56,223 INFO L226 Difference]: Without dead ends: 15 [2021-10-16 03:11:56,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20721.8ms TimeCoverageRelationStatistics Valid=15, Invalid=5, Unknown=10, NotChecked=42, Total=72 [2021-10-16 03:11:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-16 03:11:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-16 03:11:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-16 03:11:56,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2021-10-16 03:11:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:56,228 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-16 03:11:56,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-16 03:11:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 03:11:56,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:56,230 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:56,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:56,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:56,431 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:11:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:56,432 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-10-16 03:11:56,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:56,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481409609] [2021-10-16 03:11:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:56,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:56,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:56,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 03:12:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:12:10,407 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:12:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:12:21,865 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 03:12:21,865 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:12:21,866 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:12:21,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:12:21,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:22,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:12:22,074 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:12:22,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:12:22 BoogieIcfgContainer [2021-10-16 03:12:22,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:12:22,099 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:12:22,099 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:12:22,099 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:12:22,100 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:22" (3/4) ... [2021-10-16 03:12:22,101 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:12:22,141 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:12:22,141 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:12:22,142 INFO L168 Benchmark]: Toolchain (without parser) took 186253.54 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 29.7 MB in the beginning and 37.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:12:22,143 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 52.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:12:22,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.54 ms. Allocated memory is still 52.4 MB. Free memory was 29.5 MB in the beginning and 32.2 MB in the end (delta: -2.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:12:22,144 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.01 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 32.2 MB in the beginning and 50.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:12:22,145 INFO L168 Benchmark]: Boogie Preprocessor took 28.28 ms. Allocated memory is still 67.1 MB. Free memory was 50.4 MB in the beginning and 49.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:12:22,146 INFO L168 Benchmark]: RCFGBuilder took 6032.67 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 39.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:12:22,146 INFO L168 Benchmark]: TraceAbstraction took 179818.72 ms. Allocated memory is still 67.1 MB. Free memory was 39.0 MB in the beginning and 39.2 MB in the end (delta: -226.0 kB). Peak memory consumption was 146.2 kB. Max. memory is 16.1 GB. [2021-10-16 03:12:22,147 INFO L168 Benchmark]: Witness Printer took 41.89 ms. Allocated memory is still 67.1 MB. Free memory was 39.2 MB in the beginning and 37.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:12:22,149 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 52.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.54 ms. Allocated memory is still 52.4 MB. Free memory was 29.5 MB in the beginning and 32.2 MB in the end (delta: -2.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 89.01 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 32.2 MB in the beginning and 50.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.28 ms. Allocated memory is still 67.1 MB. Free memory was 50.4 MB in the beginning and 49.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 6032.67 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 39.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 179818.72 ms. Allocated memory is still 67.1 MB. Free memory was 39.0 MB in the beginning and 39.2 MB in the end (delta: -226.0 kB). Peak memory consumption was 146.2 kB. Max. memory is 16.1 GB. * Witness Printer took 41.89 ms. Allocated memory is still 67.1 MB. Free memory was 39.2 MB in the beginning and 37.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<50 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x > r)) [L37] x = x - r [L38] r = r + 1 VAL [counter=1] [L32] EXPR counter++ VAL [counter=2] [L32] COND TRUE counter++<50 [L17] COND TRUE !(cond) VAL [counter=2] [L19] reach_error() VAL [counter=2] - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 179723.2ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 12.0ms, AutomataDifference: 35474.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 7 SDslu, 66 SDs, 0 SdLazy, 14 SolverSat, 3 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 18452.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49620.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.1ms SsaConstructionTime, 18046.9ms SatisfiabilityAnalysisTime, 113579.5ms InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 38 ConstructedInterpolants, 4 QuantifiedInterpolants, 470 SizeOfPredicates, 13 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 03:12:22,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40c9fca-eb84-4240-9656-c99c443997dd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...