./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_2.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_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/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_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/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_e31d1f95-609e-4244-bc94-5f1833d61627/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 93ddc895418216afe230ea40e87acd63de5c2d0d .................................................................................................................................................................................................................................................................................................................................................................................................. 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_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/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_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/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_e31d1f95-609e-4244-bc94-5f1833d61627/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 93ddc895418216afe230ea40e87acd63de5c2d0d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:49:53,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:49:53,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:49:53,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:49:53,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:49:53,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:49:53,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:49:53,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:49:53,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:49:53,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:49:53,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:49:53,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:49:53,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:49:53,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:49:53,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:49:53,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:49:53,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:49:53,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:49:53,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:49:53,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:49:53,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:49:53,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:49:53,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:49:53,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:49:53,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:49:53,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:49:53,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:49:53,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:49:53,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:49:53,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:49:53,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:49:53,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:49:53,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:49:53,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:49:53,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:49:53,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:49:53,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:49:53,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:49:53,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:49:53,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:49:53,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:49:53,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:49:53,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:49:53,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:49:53,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:49:53,786 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:49:53,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:49:53,789 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:49:53,789 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:49:53,789 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:49:53,790 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:49:53,790 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:49:53,791 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:49:53,791 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:49:53,792 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:49:53,792 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:49:53,792 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:49:53,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:49:53,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:49:53,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:49:53,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:49:53,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:49:53,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:49:53,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:49:53,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:49:53,795 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:49:53,796 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:49:53,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:49:53,796 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:49:53,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:49:53,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:49:53,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:49:53,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:49:53,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:49:53,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:49:53,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:49:53,800 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:49:53,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:49:53,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:49:53,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:49:53,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:49:53,801 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_e31d1f95-609e-4244-bc94-5f1833d61627/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93ddc895418216afe230ea40e87acd63de5c2d0d [2021-10-16 02:49:54,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:49:54,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:49:54,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:49:54,161 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:49:54,162 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:49:54,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-simple/nested_2.c [2021-10-16 02:49:54,245 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data/721c67a49/14619ae170ce4172a21f5b9b08b2f7ec/FLAGe2031e7eb [2021-10-16 02:49:54,693 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:49:54,693 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/sv-benchmarks/c/loop-simple/nested_2.c [2021-10-16 02:49:54,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data/721c67a49/14619ae170ce4172a21f5b9b08b2f7ec/FLAGe2031e7eb [2021-10-16 02:49:55,070 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data/721c67a49/14619ae170ce4172a21f5b9b08b2f7ec [2021-10-16 02:49:55,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:49:55,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:49:55,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:49:55,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:49:55,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:49:55,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215f98b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55, skipping insertion in model container [2021-10-16 02:49:55,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:49:55,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:49:55,279 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_e31d1f95-609e-4244-bc94-5f1833d61627/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-10-16 02:49:55,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:49:55,291 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:49:55,302 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_e31d1f95-609e-4244-bc94-5f1833d61627/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-10-16 02:49:55,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:49:55,316 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:49:55,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55 WrapperNode [2021-10-16 02:49:55,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:49:55,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:49:55,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:49:55,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:49:55,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:49:55,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:49:55,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:49:55,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:49:55,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:49:55,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:49:55,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:49:55,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:49:55,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (1/1) ... [2021-10-16 02:49:55,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:49:55,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:49:55,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:49:55,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:49:55,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:49:55,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:49:55,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:49:55,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:49:55,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:49:55,769 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-16 02:49:55,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:49:55 BoogieIcfgContainer [2021-10-16 02:49:55,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:49:55,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:49:55,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:49:55,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:49:55,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:49:55" (1/3) ... [2021-10-16 02:49:55,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42db8859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:49:55, skipping insertion in model container [2021-10-16 02:49:55,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:49:55" (2/3) ... [2021-10-16 02:49:55,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42db8859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:49:55, skipping insertion in model container [2021-10-16 02:49:55,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:49:55" (3/3) ... [2021-10-16 02:49:55,779 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2021-10-16 02:49:55,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:49:55,785 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:49:55,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:49:55,855 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 02:49:55,855 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:49:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 02:49:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:49:55,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:49:55,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:49:55,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:49:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:49:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2219910, now seen corresponding path program 1 times [2021-10-16 02:49:55,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:49:55,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74400528] [2021-10-16 02:49:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:55,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:49:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:56,043 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 02:49:56,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:49:56,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74400528] [2021-10-16 02:49:56,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74400528] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:49:56,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:49:56,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:49:56,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968719418] [2021-10-16 02:49:56,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:49:56,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:49:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:49:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:49:56,067 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 02:49:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:49:56,093 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-10-16 02:49:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:49:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-16 02:49:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:49:56,102 INFO L225 Difference]: With dead ends: 15 [2021-10-16 02:49:56,103 INFO L226 Difference]: Without dead ends: 8 [2021-10-16 02:49:56,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:49:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-16 02:49:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-10-16 02:49:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 02:49:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-10-16 02:49:56,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2021-10-16 02:49:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:49:56,135 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-16 02:49:56,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 02:49:56,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2021-10-16 02:49:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:49:56,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:49:56,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:49:56,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:49:56,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:49:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:49:56,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2100548995, now seen corresponding path program 1 times [2021-10-16 02:49:56,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:49:56,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643849312] [2021-10-16 02:49:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:56,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:49:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:56,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:49:56,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643849312] [2021-10-16 02:49:56,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643849312] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:49:56,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:49:56,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:49:56,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802213698] [2021-10-16 02:49:56,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:49:56,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:49:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:49:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:49:56,184 INFO L87 Difference]: Start difference. First operand 7 states and 8 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 02:49:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:49:56,196 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2021-10-16 02:49:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:49:56,196 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 02:49:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:49:56,197 INFO L225 Difference]: With dead ends: 13 [2021-10-16 02:49:56,197 INFO L226 Difference]: Without dead ends: 8 [2021-10-16 02:49:56,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:49:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-16 02:49:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-16 02:49:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 02:49:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-16 02:49:56,201 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-16 02:49:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:49:56,201 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-16 02:49:56,201 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 02:49:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-16 02:49:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:49:56,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:49:56,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:49:56,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:49:56,203 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:49:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:49:56,204 INFO L82 PathProgramCache]: Analyzing trace with hash 688800906, now seen corresponding path program 1 times [2021-10-16 02:49:56,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:49:56,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689787845] [2021-10-16 02:49:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:56,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:49:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:56,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:49:56,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689787845] [2021-10-16 02:49:56,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689787845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:49:56,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954629695] [2021-10-16 02:49:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:56,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:49:56,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:49:56,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:49:56,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:49:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:49:56,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:56,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954629695] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:49:56,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163612537] [2021-10-16 02:49:56,512 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-16 02:49:56,513 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:49:56,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:49:56,525 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:49:56,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:49:56,605 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:56,611 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:49:56,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:56,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:49:56,623 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:49:56,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:56,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:49:56,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-16 02:49:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:49:56,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:49:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:49:56,775 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:49:56,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:49:56,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:56,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:49:56,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:56,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:49:56,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:49:56,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:49:56,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:56,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:56,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-16 02:49:56,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:49:56,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:122, output treesize:106 [2021-10-16 02:49:56,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:49:57,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:49:57,046 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_9| 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 02:49:57,050 INFO L168 Benchmark]: Toolchain (without parser) took 1973.33 ms. Allocated memory is still 119.5 MB. Free memory was 79.7 MB in the beginning and 84.9 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:49:57,050 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 119.5 MB. Free memory is still 96.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:49:57,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.70 ms. Allocated memory is still 119.5 MB. Free memory was 79.5 MB in the beginning and 95.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:49:57,052 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.94 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 93.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:49:57,052 INFO L168 Benchmark]: Boogie Preprocessor took 22.22 ms. Allocated memory is still 119.5 MB. Free memory was 93.7 MB in the beginning and 92.7 MB in the end (delta: 976.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:49:57,053 INFO L168 Benchmark]: RCFGBuilder took 395.94 ms. Allocated memory is still 119.5 MB. Free memory was 92.7 MB in the beginning and 82.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:49:57,054 INFO L168 Benchmark]: TraceAbstraction took 1275.50 ms. Allocated memory is still 119.5 MB. Free memory was 82.2 MB in the beginning and 84.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 335.2 kB. Max. memory is 16.1 GB. [2021-10-16 02:49:57,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 119.5 MB. Free memory is still 96.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 238.70 ms. Allocated memory is still 119.5 MB. Free memory was 79.5 MB in the beginning and 95.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.94 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 93.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.22 ms. Allocated memory is still 119.5 MB. Free memory was 93.7 MB in the beginning and 92.7 MB in the end (delta: 976.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 395.94 ms. Allocated memory is still 119.5 MB. Free memory was 92.7 MB in the beginning and 82.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1275.50 ms. Allocated memory is still 119.5 MB. Free memory was 82.2 MB in the beginning and 84.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 335.2 kB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_9| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_9|: 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 02:49:57,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/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 02:49:59,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:49:59,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:49:59,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:49:59,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:49:59,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:49:59,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:49:59,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:49:59,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:49:59,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:49:59,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:49:59,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:49:59,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:49:59,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:49:59,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:49:59,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:49:59,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:49:59,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:49:59,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:49:59,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:49:59,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:49:59,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:49:59,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:49:59,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:49:59,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:49:59,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:49:59,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:49:59,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:49:59,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:49:59,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:49:59,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:49:59,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:49:59,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:49:59,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:49:59,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:49:59,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:49:59,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:49:59,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:49:59,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:49:59,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:49:59,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:49:59,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:49:59,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:49:59,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:49:59,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:49:59,938 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:49:59,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:49:59,938 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:49:59,938 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:49:59,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:49:59,939 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:49:59,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:49:59,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:49:59,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:49:59,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:49:59,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:49:59,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:49:59,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:49:59,941 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:49:59,941 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:49:59,941 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:49:59,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:49:59,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:49:59,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:49:59,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:49:59,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:49:59,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:49:59,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:49:59,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:49:59,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:49:59,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:49:59,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:49:59,944 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:49:59,944 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:49:59,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:49:59,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:49:59,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:49:59,945 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_e31d1f95-609e-4244-bc94-5f1833d61627/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93ddc895418216afe230ea40e87acd63de5c2d0d [2021-10-16 02:50:00,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:50:00,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:50:00,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:50:00,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:50:00,408 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:50:00,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-simple/nested_2.c [2021-10-16 02:50:00,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data/c903d5c01/e8d11265c90a42e19ce9f1274980d52a/FLAG75f5850ea [2021-10-16 02:50:01,024 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:50:01,026 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/sv-benchmarks/c/loop-simple/nested_2.c [2021-10-16 02:50:01,033 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data/c903d5c01/e8d11265c90a42e19ce9f1274980d52a/FLAG75f5850ea [2021-10-16 02:50:01,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/data/c903d5c01/e8d11265c90a42e19ce9f1274980d52a [2021-10-16 02:50:01,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:50:01,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:50:01,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:50:01,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:50:01,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:50:01,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1604e3f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01, skipping insertion in model container [2021-10-16 02:50:01,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:50:01,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:50:01,586 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_e31d1f95-609e-4244-bc94-5f1833d61627/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-10-16 02:50:01,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:50:01,603 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:50:01,635 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_e31d1f95-609e-4244-bc94-5f1833d61627/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-10-16 02:50:01,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:50:01,659 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:50:01,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01 WrapperNode [2021-10-16 02:50:01,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:50:01,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:50:01,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:50:01,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:50:01,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:50:01,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:50:01,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:50:01,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:50:01,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:50:01,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:50:01,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:50:01,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:50:01,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (1/1) ... [2021-10-16 02:50:01,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:50:01,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:01,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:50:01,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:50:01,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:50:01,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:50:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:50:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:50:02,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:50:02,138 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-16 02:50:02,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:02 BoogieIcfgContainer [2021-10-16 02:50:02,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:50:02,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:50:02,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:50:02,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:50:02,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:50:01" (1/3) ... [2021-10-16 02:50:02,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9d2c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:50:02, skipping insertion in model container [2021-10-16 02:50:02,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:01" (2/3) ... [2021-10-16 02:50:02,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9d2c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:50:02, skipping insertion in model container [2021-10-16 02:50:02,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:02" (3/3) ... [2021-10-16 02:50:02,155 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2021-10-16 02:50:02,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:50:02,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:50:02,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:50:02,238 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 02:50:02,242 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:50:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) 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 02:50:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:50:02,282 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:02,283 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:50:02,283 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash 28697382, now seen corresponding path program 1 times [2021-10-16 02:50:02,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:02,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529751935] [2021-10-16 02:50:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:02,304 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:02,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:02,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:02,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:50:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:50:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:02,464 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 02:50:02,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:02,518 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 02:50:02,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:02,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529751935] [2021-10-16 02:50:02,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529751935] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:02,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:02,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:50:02,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492660621] [2021-10-16 02:50:02,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:50:02,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:50:02,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:02,559 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 02:50:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:02,639 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2021-10-16 02:50:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:50:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) Word has length 5 [2021-10-16 02:50:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:02,651 INFO L225 Difference]: With dead ends: 29 [2021-10-16 02:50:02,652 INFO L226 Difference]: Without dead ends: 14 [2021-10-16 02:50:02,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-16 02:50:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-16 02:50:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-16 02:50:02,714 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5 [2021-10-16 02:50:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:02,714 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-16 02:50:02,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 02:50:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-16 02:50:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:50:02,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:02,716 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:50:02,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:02,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:02,930 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:02,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1083585190, now seen corresponding path program 1 times [2021-10-16 02:50:02,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:02,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900866274] [2021-10-16 02:50:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:02,932 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:02,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:02,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:50:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:02,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:50:02,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:50:03,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:50:03,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:03,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900866274] [2021-10-16 02:50:03,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900866274] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:03,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:03,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:50:03,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773152720] [2021-10-16 02:50:03,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:50:03,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:03,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:50:03,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:03,133 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:03,154 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-10-16 02:50:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:50:03,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:50:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:03,156 INFO L225 Difference]: With dead ends: 29 [2021-10-16 02:50:03,156 INFO L226 Difference]: Without dead ends: 20 [2021-10-16 02:50:03,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-16 02:50:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-16 02:50:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 02:50:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-16 02:50:03,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-10-16 02:50:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:03,164 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-16 02:50:03,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-16 02:50:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:50:03,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:03,166 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:50:03,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:03,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:03,378 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1571899686, now seen corresponding path program 1 times [2021-10-16 02:50:03,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:03,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623707319] [2021-10-16 02:50:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:03,380 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:03,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:03,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:03,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:50:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:50:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:50:03,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:50:03,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:03,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623707319] [2021-10-16 02:50:03,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623707319] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:03,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2132131116] [2021-10-16 02:50:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:03,665 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:03,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:03,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:50:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:03,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:50:03,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:50:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:50:03,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2132131116] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:03,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899088365] [2021-10-16 02:50:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:03,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:03,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:03,969 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:04,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:50:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:50:04,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 02:50:04,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 02:50:04,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899088365] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:04,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:04,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-10-16 02:50:04,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496594227] [2021-10-16 02:50:04,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:50:04,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:04,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:50:04,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:50:04,483 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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 02:50:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:05,937 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2021-10-16 02:50:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-16 02:50:05,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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 19 [2021-10-16 02:50:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:05,939 INFO L225 Difference]: With dead ends: 108 [2021-10-16 02:50:05,939 INFO L226 Difference]: Without dead ends: 96 [2021-10-16 02:50:05,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1230.8ms TimeCoverageRelationStatistics Valid=689, Invalid=1963, Unknown=0, NotChecked=0, Total=2652 [2021-10-16 02:50:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-16 02:50:05,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-16 02:50:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 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 02:50:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-10-16 02:50:05,974 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 19 [2021-10-16 02:50:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:05,975 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-10-16 02:50:05,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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 02:50:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-10-16 02:50:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-16 02:50:05,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:05,979 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2021-10-16 02:50:05,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:06,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:06,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:06,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:06,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:06,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1766438950, now seen corresponding path program 2 times [2021-10-16 02:50:06,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:06,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197182968] [2021-10-16 02:50:06,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:06,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:06,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:06,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:06,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:50:06,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:06,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:06,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 02:50:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1382 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:07,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1347 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-16 02:50:07,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:07,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197182968] [2021-10-16 02:50:07,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197182968] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:07,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [67680033] [2021-10-16 02:50:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:07,957 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:07,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:07,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:07,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 02:50:08,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:08,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:50:08,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1347 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-16 02:50:08,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1347 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-16 02:50:09,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [67680033] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:09,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415984356] [2021-10-16 02:50:09,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:09,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:09,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:09,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:09,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:50:09,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:50:09,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1347 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-16 02:50:09,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1347 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-16 02:50:11,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415984356] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:11,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:11,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16, 16, 16, 18] total 36 [2021-10-16 02:50:11,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459582187] [2021-10-16 02:50:11,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-16 02:50:11,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:11,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-16 02:50:11,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 02:50:11,331 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 36 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 36 states have internal predecessors, (98), 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 02:50:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:11,763 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-10-16 02:50:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 02:50:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 36 states have internal predecessors, (98), 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 95 [2021-10-16 02:50:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:11,765 INFO L225 Difference]: With dead ends: 112 [2021-10-16 02:50:11,765 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:50:11,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 863.0ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 02:50:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:50:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:50:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:50:11,767 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 95 [2021-10-16 02:50:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:11,768 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:50:11,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 36 states have internal predecessors, (98), 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 02:50:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:50:11,768 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:50:11,771 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:50:11,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:11,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-16 02:50:12,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:12,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:12,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:50:12,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:50:12,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:50:12,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:50:12,690 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:50:12,690 INFO L857 garLoopResultBuilder]: For program point L25-1(lines 25 27) no Hoare annotation was computed. [2021-10-16 02:50:12,690 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2021-10-16 02:50:12,690 INFO L853 garLoopResultBuilder]: At program point L21-3(lines 21 23) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~a~0 (_ bv5 32)))) (or (= (_ bv4 32) ULTIMATE.start_main_~a~0) (and .cse0 (= (_ bv2 32) ULTIMATE.start_main_~b~0)) (= (_ bv3 32) ULTIMATE.start_main_~a~0) (and .cse0 (= (_ bv4 32) ULTIMATE.start_main_~b~0)) (and .cse0 (= ULTIMATE.start_main_~b~0 (_ bv5 32))) (= (_ bv2 32) ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~a~0 (_ bv0 32)) (= ULTIMATE.start_main_~a~0 (_ bv1 32)) (and .cse0 (= (_ bv6 32) ULTIMATE.start_main_~b~0)) (and .cse0 (= ULTIMATE.start_main_~b~0 (_ bv1 32))) (and .cse0 (= ULTIMATE.start_main_~b~0 (_ bv0 32))) (and .cse0 (= (_ bv3 32) ULTIMATE.start_main_~b~0)))) [2021-10-16 02:50:12,691 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:50:12,691 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:50:12,691 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:50:12,691 INFO L860 garLoopResultBuilder]: At program point L28(lines 15 29) the Hoare annotation is: true [2021-10-16 02:50:12,691 INFO L857 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-10-16 02:50:12,691 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2021-10-16 02:50:12,691 INFO L857 garLoopResultBuilder]: For program point L20-2(lines 20 24) no Hoare annotation was computed. [2021-10-16 02:50:12,692 INFO L853 garLoopResultBuilder]: At program point L20-3(lines 20 24) the Hoare annotation is: (or (= (_ bv4 32) ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~a~0 (_ bv5 32)) (= (_ bv3 32) ULTIMATE.start_main_~a~0) (= (_ bv2 32) ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~a~0 (_ bv0 32)) (= ULTIMATE.start_main_~a~0 (_ bv1 32)) (and (= (_ bv6 32) ULTIMATE.start_main_~a~0) (= (_ bv6 32) ULTIMATE.start_main_~b~0))) [2021-10-16 02:50:12,692 INFO L857 garLoopResultBuilder]: For program point L20-4(lines 15 29) no Hoare annotation was computed. [2021-10-16 02:50:12,695 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:50:12,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:50:12 BoogieIcfgContainer [2021-10-16 02:50:12,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:50:12,712 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:50:12,712 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:50:12,712 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:50:12,713 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:02" (3/4) ... [2021-10-16 02:50:12,716 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:50:12,726 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-16 02:50:12,726 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:50:12,726 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:50:12,727 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:50:12,769 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:50:12,770 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:50:12,771 INFO L168 Benchmark]: Toolchain (without parser) took 11378.64 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 45.6 MB in the beginning and 92.1 MB in the end (delta: -46.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:50:12,772 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory was 61.8 MB in the beginning and 61.7 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:50:12,772 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.98 ms. Allocated memory is still 79.7 MB. Free memory was 45.4 MB in the beginning and 63.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:12,772 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.71 ms. Allocated memory is still 79.7 MB. Free memory was 63.9 MB in the beginning and 62.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:50:12,773 INFO L168 Benchmark]: Boogie Preprocessor took 47.67 ms. Allocated memory is still 79.7 MB. Free memory was 62.6 MB in the beginning and 61.6 MB in the end (delta: 965.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:50:12,773 INFO L168 Benchmark]: RCFGBuilder took 386.42 ms. Allocated memory is still 79.7 MB. Free memory was 61.4 MB in the beginning and 52.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:12,774 INFO L168 Benchmark]: TraceAbstraction took 10569.32 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 51.7 MB in the beginning and 95.2 MB in the end (delta: -43.5 MB). Peak memory consumption was 59.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:12,774 INFO L168 Benchmark]: Witness Printer took 58.05 ms. Allocated memory is still 117.4 MB. Free memory was 95.2 MB in the beginning and 92.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:12,777 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory was 61.8 MB in the beginning and 61.7 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.98 ms. Allocated memory is still 79.7 MB. Free memory was 45.4 MB in the beginning and 63.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.71 ms. Allocated memory is still 79.7 MB. Free memory was 63.9 MB in the beginning and 62.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.67 ms. Allocated memory is still 79.7 MB. Free memory was 62.6 MB in the beginning and 61.6 MB in the end (delta: 965.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 386.42 ms. Allocated memory is still 79.7 MB. Free memory was 61.4 MB in the beginning and 52.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10569.32 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 51.7 MB in the beginning and 95.2 MB in the end (delta: -43.5 MB). Peak memory consumption was 59.0 MB. Max. memory is 16.1 GB. * Witness Printer took 58.05 ms. Allocated memory is still 117.4 MB. Free memory was 95.2 MB in the beginning and 92.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 26]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10466.7ms, OverallIterations: 4, TraceHistogramMax: 36, EmptinessCheckTime: 27.5ms, AutomataDifference: 2046.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 316.9ms, InitialAbstractionConstructionTime: 18.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 43 SDtfs, 259 SDslu, 138 SDs, 0 SdLazy, 896 SolverSat, 165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 631.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 738 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2114.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=3, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 53 NumberOfFragments, 92 HoareAnnotationTreeSize, 3 FomulaSimplifications, 413 FormulaSimplificationTreeSizeReduction, 125.5ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 95 FormulaSimplificationTreeSizeReductionInter, 186.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 115.6ms SsaConstructionTime, 341.8ms SatisfiabilityAnalysisTime, 5023.5ms InterpolantComputationTime, 358 NumberOfCodeBlocks, 358 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 700 ConstructedInterpolants, 0 QuantifiedInterpolants, 2987 SizeOfPredicates, 7 NumberOfNonLiveVariables, 552 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 1155/9322 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((((((4bv32 == a || (a == 5bv32 && 2bv32 == b)) || 3bv32 == a) || (a == 5bv32 && 4bv32 == b)) || (a == 5bv32 && b == 5bv32)) || 2bv32 == a) || a == 0bv32) || a == 1bv32) || (a == 5bv32 && 6bv32 == b)) || (a == 5bv32 && b == 1bv32)) || (a == 5bv32 && b == 0bv32)) || (a == 5bv32 && 3bv32 == b) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((((4bv32 == a || a == 5bv32) || 3bv32 == a) || 2bv32 == a) || a == 0bv32) || a == 1bv32) || (6bv32 == a && 6bv32 == b) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:50:12,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e31d1f95-609e-4244-bc94-5f1833d61627/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...