./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.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_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/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_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/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_ee24678f-1361-4764-bcfe-10b003593f84/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 6b7e4344a1b47d68a491e369e16c1769051091e9 .......................................................................................................................................................................................................................................................................................................................................................... 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_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/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_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/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_ee24678f-1361-4764-bcfe-10b003593f84/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 6b7e4344a1b47d68a491e369e16c1769051091e9 ................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 03:17:48,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:17:48,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:17:48,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:17:48,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:17:48,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:17:48,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:17:48,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:17:48,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:17:48,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:17:48,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:17:48,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:17:48,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:17:48,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:17:48,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:17:48,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:17:48,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:17:48,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:17:48,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:17:48,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:17:48,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:17:48,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:17:48,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:17:48,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:17:48,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:17:48,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:17:48,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:17:48,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:17:48,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:17:48,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:17:48,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:17:48,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:17:48,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:17:48,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:17:48,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:17:48,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:17:48,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:17:48,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:17:48,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:17:48,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:17:48,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:17:48,635 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:17:48,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:17:48,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:17:48,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:17:48,679 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:17:48,680 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:17:48,680 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:17:48,680 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:17:48,681 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:17:48,681 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:17:48,681 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:17:48,688 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:17:48,688 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:17:48,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:17:48,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:17:48,689 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:17:48,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:17:48,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:17:48,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:17:48,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:17:48,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:17:48,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:17:48,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:17:48,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:17:48,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:17:48,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:17:48,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:17:48,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:17:48,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:17:48,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:17:48,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:17:48,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:17:48,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:17:48,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:17:48,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:17:48,697 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:17:48,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:17:48,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:17:48,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:17:48,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:17:48,698 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_ee24678f-1361-4764-bcfe-10b003593f84/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b7e4344a1b47d68a491e369e16c1769051091e9 [2021-10-16 03:17:49,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:17:49,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:17:49,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:17:49,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:17:49,080 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:17:49,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2021-10-16 03:17:49,162 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data/7af600445/6fd02f5471c84487aedeb0275e1ebf2d/FLAG0854989d0 [2021-10-16 03:17:49,614 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:17:49,614 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2021-10-16 03:17:49,619 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data/7af600445/6fd02f5471c84487aedeb0275e1ebf2d/FLAG0854989d0 [2021-10-16 03:17:50,008 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data/7af600445/6fd02f5471c84487aedeb0275e1ebf2d [2021-10-16 03:17:50,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:17:50,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:17:50,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:17:50,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:17:50,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:17:50,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@597fed80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50, skipping insertion in model container [2021-10-16 03:17:50,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:17:50,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:17:50,230 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_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[557,570] [2021-10-16 03:17:50,233 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_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[613,626] [2021-10-16 03:17:50,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:17:50,245 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:17:50,262 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_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[557,570] [2021-10-16 03:17:50,263 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_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[613,626] [2021-10-16 03:17:50,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:17:50,279 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:17:50,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50 WrapperNode [2021-10-16 03:17:50,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:17:50,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:17:50,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:17:50,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:17:50,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:17:50,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:17:50,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:17:50,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:17:50,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:17:50,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:17:50,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:17:50,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:17:50,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (1/1) ... [2021-10-16 03:17:50,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:17:50,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:17:50,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:17:50,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:17:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:17:50,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:17:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:17:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:17:50,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:17:50,754 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-16 03:17:50,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:17:50 BoogieIcfgContainer [2021-10-16 03:17:50,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:17:50,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:17:50,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:17:50,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:17:50,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:17:50" (1/3) ... [2021-10-16 03:17:50,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6186e322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:17:50, skipping insertion in model container [2021-10-16 03:17:50,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:50" (2/3) ... [2021-10-16 03:17:50,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6186e322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:17:50, skipping insertion in model container [2021-10-16 03:17:50,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:17:50" (3/3) ... [2021-10-16 03:17:50,768 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-b.c [2021-10-16 03:17:50,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:17:50,774 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 03:17:50,825 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:17:50,833 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 03:17:50,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 03:17:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 states have internal predecessors, (14), 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 03:17:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:17:50,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:50,869 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 03:17:50,870 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:17:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash 63046149, now seen corresponding path program 1 times [2021-10-16 03:17:50,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:17:50,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042344078] [2021-10-16 03:17:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:50,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:17:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:51,204 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 03:17:51,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:17:51,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042344078] [2021-10-16 03:17:51,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042344078] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:17:51,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:17:51,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:17:51,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083884919] [2021-10-16 03:17:51,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:17:51,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:17:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:17:51,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:17:51,240 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 states have internal predecessors, (14), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 03:17:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:51,270 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-16 03:17:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:17:51,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-10-16 03:17:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:51,282 INFO L225 Difference]: With dead ends: 18 [2021-10-16 03:17:51,282 INFO L226 Difference]: Without dead ends: 7 [2021-10-16 03:17:51,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:17:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-16 03:17:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-16 03:17:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 03:17:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-16 03:17:51,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-16 03:17:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:51,316 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-16 03:17:51,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 03:17:51,317 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-16 03:17:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:17:51,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:51,318 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:17:51,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:17:51,319 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:17:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:51,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1953761755, now seen corresponding path program 1 times [2021-10-16 03:17:51,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:17:51,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355961874] [2021-10-16 03:17:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:51,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:17:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:51,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:17:51,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355961874] [2021-10-16 03:17:51,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355961874] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:17:51,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913986319] [2021-10-16 03:17:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:51,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:17:51,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:17:51,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:17:51,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:17:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:51,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:17:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:51,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:51,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913986319] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:17:51,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510633202] [2021-10-16 03:17:51,774 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-16 03:17:51,774 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:17:51,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:17:51,796 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:17:51,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:17:51,852 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:17:51,864 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:17:51,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:17:51,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 03:17:51,870 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:17:51,871 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:17:51,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 03:17:51,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-16 03:17:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:17:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:17:51,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:17:51,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 03:17:51,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:17:51,931 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 03:17:51,933 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:17:51,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 03:17:51,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:17:51,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:17:51,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:17:51,983 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:17:51,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-16 03:17:51,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:17:51,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:116, output treesize:119 [2021-10-16 03:17:52,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:52,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:17:52,201 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_10| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 03:17:52,205 INFO L168 Benchmark]: Toolchain (without parser) took 2192.01 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 71.8 MB in the beginning and 92.3 MB in the end (delta: -20.5 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:52,205 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory is still 87.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:17:52,206 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.59 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 84.7 MB in the end (delta: -13.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:52,206 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.58 ms. Allocated memory is still 109.1 MB. Free memory was 84.3 MB in the beginning and 83.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:52,207 INFO L168 Benchmark]: Boogie Preprocessor took 22.17 ms. Allocated memory is still 109.1 MB. Free memory was 83.1 MB in the beginning and 82.2 MB in the end (delta: 891.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:17:52,208 INFO L168 Benchmark]: RCFGBuilder took 417.18 ms. Allocated memory is still 109.1 MB. Free memory was 82.2 MB in the beginning and 72.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:52,209 INFO L168 Benchmark]: TraceAbstraction took 1444.22 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 71.7 MB in the beginning and 92.3 MB in the end (delta: -20.6 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:52,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory is still 87.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.59 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 84.7 MB in the end (delta: -13.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.58 ms. Allocated memory is still 109.1 MB. Free memory was 84.3 MB in the beginning and 83.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.17 ms. Allocated memory is still 109.1 MB. Free memory was 83.1 MB in the beginning and 82.2 MB in the end (delta: 891.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 417.18 ms. Allocated memory is still 109.1 MB. Free memory was 82.2 MB in the beginning and 72.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1444.22 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 71.7 MB in the beginning and 92.3 MB in the end (delta: -20.6 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 03:17:52,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/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 03:17:54,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:17:54,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:17:54,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:17:54,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:17:54,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:17:54,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:17:54,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:17:54,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:17:54,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:17:54,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:17:54,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:17:54,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:17:54,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:17:54,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:17:54,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:17:54,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:17:54,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:17:54,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:17:54,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:17:54,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:17:54,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:17:54,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:17:54,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:17:54,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:17:54,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:17:54,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:17:54,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:17:54,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:17:54,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:17:54,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:17:54,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:17:54,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:17:54,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:17:54,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:17:54,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:17:54,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:17:54,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:17:54,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:17:54,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:17:54,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:17:54,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 03:17:54,914 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:17:54,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:17:54,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:17:54,916 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:17:54,916 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:17:54,916 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:17:54,916 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:17:54,917 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:17:54,917 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:17:54,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:17:54,920 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:17:54,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:17:54,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:17:54,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:17:54,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:17:54,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:17:54,921 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:17:54,921 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:17:54,922 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:17:54,922 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:17:54,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:17:54,922 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:17:54,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:17:54,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:17:54,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:17:54,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:17:54,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:17:54,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:17:54,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:17:54,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:17:54,924 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:17:54,925 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:17:54,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:17:54,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:17:54,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:17:54,926 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_ee24678f-1361-4764-bcfe-10b003593f84/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b7e4344a1b47d68a491e369e16c1769051091e9 [2021-10-16 03:17:55,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:17:55,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:17:55,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:17:55,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:17:55,310 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:17:55,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2021-10-16 03:17:55,384 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data/9bb653cfe/206ef80139f5451d97fe88d084cf8228/FLAGe681301f7 [2021-10-16 03:17:55,820 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:17:55,820 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2021-10-16 03:17:55,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data/9bb653cfe/206ef80139f5451d97fe88d084cf8228/FLAGe681301f7 [2021-10-16 03:17:56,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/data/9bb653cfe/206ef80139f5451d97fe88d084cf8228 [2021-10-16 03:17:56,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:17:56,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:17:56,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:17:56,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:17:56,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:17:56,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60afda00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56, skipping insertion in model container [2021-10-16 03:17:56,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:17:56,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:17:56,422 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_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[557,570] [2021-10-16 03:17:56,426 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_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[613,626] [2021-10-16 03:17:56,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:17:56,439 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:17:56,454 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_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[557,570] [2021-10-16 03:17:56,455 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_ee24678f-1361-4764-bcfe-10b003593f84/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[613,626] [2021-10-16 03:17:56,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:17:56,470 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:17:56,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56 WrapperNode [2021-10-16 03:17:56,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:17:56,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:17:56,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:17:56,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:17:56,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:17:56,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:17:56,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:17:56,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:17:56,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:17:56,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:17:56,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:17:56,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:17:56,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (1/1) ... [2021-10-16 03:17:56,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:17:56,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:17:56,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:17:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:17:56,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:17:56,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:17:56,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:17:56,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:17:56,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:17:56,984 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-16 03:17:56,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:17:56 BoogieIcfgContainer [2021-10-16 03:17:56,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:17:56,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:17:56,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:17:57,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:17:57,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:17:56" (1/3) ... [2021-10-16 03:17:57,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c976ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:17:57, skipping insertion in model container [2021-10-16 03:17:57,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:17:56" (2/3) ... [2021-10-16 03:17:57,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c976ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:17:57, skipping insertion in model container [2021-10-16 03:17:57,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:17:56" (3/3) ... [2021-10-16 03:17:57,019 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-b.c [2021-10-16 03:17:57,025 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:17:57,025 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 03:17:57,076 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:17:57,082 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 03:17:57,083 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 03:17:57,096 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 03:17:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:17:57,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:57,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:17:57,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:17:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:57,123 INFO L82 PathProgramCache]: Analyzing trace with hash 889577263, now seen corresponding path program 1 times [2021-10-16 03:17:57,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:57,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574921845] [2021-10-16 03:17:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:57,136 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:57,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:57,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:17:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 03:17:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:57,287 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 03:17:57,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:57,320 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 03:17:57,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:17:57,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574921845] [2021-10-16 03:17:57,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574921845] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:17:57,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:17:57,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:17:57,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524048084] [2021-10-16 03:17:57,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:17:57,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:17:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:17:57,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:17:57,362 INFO L87 Difference]: Start difference. First 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 03:17:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:57,375 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-10-16 03:17:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:17:57,378 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 03:17:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:57,385 INFO L225 Difference]: With dead ends: 20 [2021-10-16 03:17:57,386 INFO L226 Difference]: Without dead ends: 7 [2021-10-16 03:17:57,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:17:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-16 03:17:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-16 03:17:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 03:17:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-16 03:17:57,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 6 [2021-10-16 03:17:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:57,421 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-16 03:17:57,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 03:17:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-16 03:17:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:17:57,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:57,423 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:17:57,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:57,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:17:57,634 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:17:57,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash 889573419, now seen corresponding path program 1 times [2021-10-16 03:17:57,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:57,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209829132] [2021-10-16 03:17:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:57,642 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:57,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:57,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:57,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:17:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:57,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 03:17:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:57,792 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 03:17:57,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:57,820 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 03:17:57,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:17:57,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209829132] [2021-10-16 03:17:57,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209829132] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:17:57,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:17:57,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 03:17:57,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748627012] [2021-10-16 03:17:57,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:17:57,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:17:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:17:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:17:57,827 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 03:17:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:57,840 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-10-16 03:17:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:17:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 03:17:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:57,841 INFO L225 Difference]: With dead ends: 11 [2021-10-16 03:17:57,841 INFO L226 Difference]: Without dead ends: 8 [2021-10-16 03:17:57,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:17:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-16 03:17:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-16 03:17:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 03:17:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-16 03:17:57,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-16 03:17:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:57,845 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-16 03:17:57,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 03:17:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-16 03:17:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:17:57,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:57,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:17:57,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:58,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:17:58,048 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:17:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:58,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1807024099, now seen corresponding path program 1 times [2021-10-16 03:17:58,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:58,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623827383] [2021-10-16 03:17:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:58,050 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:58,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:58,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:58,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:17:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:17:58,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:58,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:58,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:17:58,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623827383] [2021-10-16 03:17:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623827383] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:17:58,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1494268046] [2021-10-16 03:17:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:58,187 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:17:58,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:17:58,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:17:58,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 03:17:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:17:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:58,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:58,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1494268046] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:17:58,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235912737] [2021-10-16 03:17:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:58,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:17:58,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:17:58,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:17:58,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 03:17:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:58,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:17:58,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:58,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:58,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235912737] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:17:58,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:17:58,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 5 [2021-10-16 03:17:58,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776156004] [2021-10-16 03:17:58,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:17:58,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:17:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:17:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:17:58,541 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 03:17:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:58,575 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-10-16 03:17:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:17:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 03:17:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:58,576 INFO L225 Difference]: With dead ends: 12 [2021-10-16 03:17:58,576 INFO L226 Difference]: Without dead ends: 9 [2021-10-16 03:17:58,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:17:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-16 03:17:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-16 03:17:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 03:17:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-16 03:17:58,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-16 03:17:58,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:58,580 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-16 03:17:58,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 03:17:58,581 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-16 03:17:58,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:17:58,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:58,582 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-16 03:17:58,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:58,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:58,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:59,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:17:59,193 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:17:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:59,194 INFO L82 PathProgramCache]: Analyzing trace with hash 183224107, now seen corresponding path program 2 times [2021-10-16 03:17:59,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:59,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992287576] [2021-10-16 03:17:59,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:17:59,195 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:59,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:59,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:59,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 03:17:59,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:17:59,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 03:17:59,257 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:17:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:17:59,305 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 03:17:59,305 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:17:59,306 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:17:59,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:17:59,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:59,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:17:59,515 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:17:59,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:17:59 BoogieIcfgContainer [2021-10-16 03:17:59,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:17:59,542 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:17:59,542 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:17:59,543 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:17:59,543 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:17:56" (3/4) ... [2021-10-16 03:17:59,546 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:17:59,630 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:17:59,631 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:17:59,632 INFO L168 Benchmark]: Toolchain (without parser) took 3390.21 ms. Allocated memory was 52.4 MB in the beginning and 79.7 MB in the end (delta: 27.3 MB). Free memory was 29.2 MB in the beginning and 61.2 MB in the end (delta: -32.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:59,636 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 52.4 MB. Free memory was 33.5 MB in the beginning and 33.5 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:17:59,637 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.13 ms. Allocated memory is still 52.4 MB. Free memory was 29.0 MB in the beginning and 32.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:59,638 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.16 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 32.3 MB in the beginning and 48.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:59,639 INFO L168 Benchmark]: Boogie Preprocessor took 48.21 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 47.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:17:59,639 INFO L168 Benchmark]: RCFGBuilder took 409.19 ms. Allocated memory is still 65.0 MB. Free memory was 47.2 MB in the beginning and 37.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:59,639 INFO L168 Benchmark]: TraceAbstraction took 2544.94 ms. Allocated memory is still 65.0 MB. Free memory was 37.5 MB in the beginning and 31.6 MB in the end (delta: 5.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:59,640 INFO L168 Benchmark]: Witness Printer took 88.53 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 31.6 MB in the beginning and 61.2 MB in the end (delta: -29.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:17:59,645 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 52.4 MB. Free memory was 33.5 MB in the beginning and 33.5 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 228.13 ms. Allocated memory is still 52.4 MB. Free memory was 29.0 MB in the beginning and 32.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.16 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 32.3 MB in the beginning and 48.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.21 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 47.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 409.19 ms. Allocated memory is still 65.0 MB. Free memory was 47.2 MB in the beginning and 37.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2544.94 ms. Allocated memory is still 65.0 MB. Free memory was 37.5 MB in the beginning and 31.6 MB in the end (delta: 5.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Witness Printer took 88.53 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 31.6 MB in the beginning and 61.2 MB in the end (delta: -29.6 MB). Peak memory consumption was 4.2 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: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L5] unsigned char n = __VERIFIER_nondet_uchar(); [L6] COND FALSE !(n == 0) [L9] unsigned char v = 0; [L10] unsigned char s = 0; [L11] unsigned int i = 0; [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND FALSE !(i < n) [L17] COND TRUE s < v [L18] reach_error() - UnprovableResult [Line: 22]: 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: 2439.2ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 25.9ms, AutomataDifference: 103.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 10 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.2ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 53.9ms SsaConstructionTime, 122.8ms SatisfiabilityAnalysisTime, 485.6ms InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 130 SizeOfPredicates, 9 NumberOfNonLiveVariables, 157 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 03:17:59,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee24678f-1361-4764-bcfe-10b003593f84/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...