./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/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 fa528625528e1eb8428ab738bffd6c9e4b89662e .............................................................................................................................................................................................................................................................................................................................................................. 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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/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 fa528625528e1eb8428ab738bffd6c9e4b89662e .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:18:54,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:18:54,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:18:54,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:18:54,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:18:54,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:18:54,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:18:54,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:18:54,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:18:54,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:18:54,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:18:54,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:18:54,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:18:54,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:18:54,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:18:54,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:18:54,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:18:54,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:18:54,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:18:54,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:18:54,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:18:54,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:18:54,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:18:54,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:18:54,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:18:54,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:18:54,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:18:54,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:18:54,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:18:54,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:18:54,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:18:54,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:18:54,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:18:54,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:18:54,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:18:54,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:18:54,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:18:54,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:18:54,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:18:54,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:18:54,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:18:54,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:18:54,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:18:54,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:18:54,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:18:54,824 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:18:54,824 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:18:54,825 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:18:54,825 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:18:54,825 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:18:54,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:18:54,826 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:18:54,827 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:18:54,827 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:18:54,827 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:18:54,828 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:18:54,828 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:18:54,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:18:54,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:18:54,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:18:54,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:18:54,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:18:54,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:18:54,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:18:54,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:18:54,831 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:18:54,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:18:54,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:18:54,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:18:54,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:18:54,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:18:54,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:18:54,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:18:54,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:18:54,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:18:54,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:18:54,836 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:18:54,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:18:54,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:18:54,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:18:54,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:18:54,837 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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa528625528e1eb8428ab738bffd6c9e4b89662e [2021-10-16 03:18:55,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:18:55,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:18:55,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:18:55,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:18:55,185 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:18:55,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/ldv-regression/test24-2.c [2021-10-16 03:18:55,273 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data/eb25d1988/c3081106de0d4b1fb72ffb9a1947adf5/FLAG356b340ff [2021-10-16 03:18:55,884 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:18:55,885 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/sv-benchmarks/c/ldv-regression/test24-2.c [2021-10-16 03:18:55,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data/eb25d1988/c3081106de0d4b1fb72ffb9a1947adf5/FLAG356b340ff [2021-10-16 03:18:56,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data/eb25d1988/c3081106de0d4b1fb72ffb9a1947adf5 [2021-10-16 03:18:56,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:18:56,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:18:56,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:18:56,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:18:56,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:18:56,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f56d318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56, skipping insertion in model container [2021-10-16 03:18:56,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:18:56,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:18:56,568 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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-10-16 03:18:56,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:18:56,584 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:18:56,618 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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-10-16 03:18:56,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:18:56,645 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:18:56,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56 WrapperNode [2021-10-16 03:18:56,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:18:56,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:18:56,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:18:56,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:18:56,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:18:56,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:18:56,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:18:56,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:18:56,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:18:56,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:18:56,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:18:56,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:18:56,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (1/1) ... [2021-10-16 03:18:56,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:18:56,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:18:56,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:18:56,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:18:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:18:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:18:56,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:18:56,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:18:56,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:18:56,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 03:18:56,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:18:57,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:18:57,316 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 03:18:57,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:18:57 BoogieIcfgContainer [2021-10-16 03:18:57,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:18:57,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:18:57,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:18:57,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:18:57,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:18:56" (1/3) ... [2021-10-16 03:18:57,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784b95cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:18:57, skipping insertion in model container [2021-10-16 03:18:57,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:56" (2/3) ... [2021-10-16 03:18:57,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784b95cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:18:57, skipping insertion in model container [2021-10-16 03:18:57,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:18:57" (3/3) ... [2021-10-16 03:18:57,344 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2021-10-16 03:18:57,350 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:18:57,351 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:18:57,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:18:57,453 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 03:18:57,454 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:18:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:18:57,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:57,501 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:18:57,502 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:18:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2024849811, now seen corresponding path program 1 times [2021-10-16 03:18:57,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:18:57,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184927376] [2021-10-16 03:18:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:57,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:18:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:57,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:18:57,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184927376] [2021-10-16 03:18:57,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184927376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:18:57,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:18:57,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:18:57,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098872609] [2021-10-16 03:18:57,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:18:57,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:18:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:18:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:18:57,840 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:18:57,900 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2021-10-16 03:18:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:18:57,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 7 [2021-10-16 03:18:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:18:57,912 INFO L225 Difference]: With dead ends: 23 [2021-10-16 03:18:57,913 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 03:18:57,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:18:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 03:18:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-16 03:18:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-16 03:18:57,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-10-16 03:18:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:18:57,954 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-16 03:18:57,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-16 03:18:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:18:57,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:57,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:18:57,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:18:57,957 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:18:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:57,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2016690528, now seen corresponding path program 1 times [2021-10-16 03:18:57,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:18:57,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323912035] [2021-10-16 03:18:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:57,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:18:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:58,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:18:58,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323912035] [2021-10-16 03:18:58,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323912035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:18:58,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943982070] [2021-10-16 03:18:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:58,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:18:58,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:18:58,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:18:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:58,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:18:58,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:18:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:58,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:18:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:58,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943982070] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:18:58,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290962512] [2021-10-16 03:18:58,427 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-16 03:18:58,427 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:18:58,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:18:58,445 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:18:58,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:18:58,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:58,563 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:18:58,566 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:58,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-16 03:18:58,569 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:18:58,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:58,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-16 03:18:58,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-10-16 03:18:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:58,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:58,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:58,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:58,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:58,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:58,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-10-16 03:18:58,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:58,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-16 03:18:58,675 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:58,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-16 03:18:58,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:18:58,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:18:58,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:58,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:58,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-10-16 03:18:58,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:18:58,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:157 [2021-10-16 03:18:58,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:58,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-16 03:18:58,964 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_18| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 03:18:58,968 INFO L168 Benchmark]: Toolchain (without parser) took 2731.44 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 53.0 MB in the beginning and 67.8 MB in the end (delta: -14.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:58,969 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory was 69.7 MB in the beginning and 69.7 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:18:58,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.66 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 52.8 MB in the beginning and 93.7 MB in the end (delta: -40.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:58,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.27 ms. Allocated memory is still 117.4 MB. Free memory was 93.7 MB in the beginning and 92.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:58,971 INFO L168 Benchmark]: Boogie Preprocessor took 56.43 ms. Allocated memory is still 117.4 MB. Free memory was 92.1 MB in the beginning and 90.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:58,972 INFO L168 Benchmark]: RCFGBuilder took 573.46 ms. Allocated memory is still 117.4 MB. Free memory was 90.8 MB in the beginning and 78.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:58,973 INFO L168 Benchmark]: TraceAbstraction took 1632.19 ms. Allocated memory is still 117.4 MB. Free memory was 78.2 MB in the beginning and 67.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:58,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory was 69.7 MB in the beginning and 69.7 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 405.66 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 52.8 MB in the beginning and 93.7 MB in the end (delta: -40.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.27 ms. Allocated memory is still 117.4 MB. Free memory was 93.7 MB in the beginning and 92.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.43 ms. Allocated memory is still 117.4 MB. Free memory was 92.1 MB in the beginning and 90.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 573.46 ms. Allocated memory is still 117.4 MB. Free memory was 90.8 MB in the beginning and 78.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1632.19 ms. Allocated memory is still 117.4 MB. Free memory was 78.2 MB in the beginning and 67.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_18| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_18|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 03:18:59,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:19:02,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:19:02,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:19:02,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:19:02,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:19:02,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:19:02,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:19:02,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:19:02,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:19:02,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:19:02,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:19:02,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:19:02,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:19:02,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:19:02,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:19:02,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:19:02,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:19:02,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:19:02,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:19:02,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:19:02,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:19:02,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:19:02,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:19:02,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:19:02,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:19:02,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:19:02,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:19:02,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:19:02,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:19:02,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:19:02,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:19:02,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:19:02,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:19:02,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:19:02,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:19:02,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:19:02,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:19:02,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:19:02,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:19:02,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:19:02,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:19:02,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 03:19:02,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:19:02,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:19:02,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:19:02,389 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:19:02,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:19:02,390 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:19:02,390 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:19:02,390 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:19:02,391 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:19:02,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:19:02,394 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:19:02,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:19:02,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:19:02,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:19:02,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:19:02,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:19:02,396 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:19:02,396 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:19:02,396 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:19:02,396 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:19:02,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:19:02,397 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:19:02,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:19:02,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:19:02,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:19:02,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:19:02,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:19:02,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:19:02,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:19:02,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:19:02,399 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:19:02,400 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:19:02,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:19:02,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:19:02,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:19:02,401 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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa528625528e1eb8428ab738bffd6c9e4b89662e [2021-10-16 03:19:02,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:19:02,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:19:02,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:19:02,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:19:02,948 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:19:02,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/ldv-regression/test24-2.c [2021-10-16 03:19:03,045 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data/f248dcd2d/d054a4465f0749c5bf139a74e82773f2/FLAG2a5ee0512 [2021-10-16 03:19:03,704 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:19:03,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/sv-benchmarks/c/ldv-regression/test24-2.c [2021-10-16 03:19:03,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data/f248dcd2d/d054a4465f0749c5bf139a74e82773f2/FLAG2a5ee0512 [2021-10-16 03:19:04,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/data/f248dcd2d/d054a4465f0749c5bf139a74e82773f2 [2021-10-16 03:19:04,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:19:04,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:19:04,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:19:04,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:19:04,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:19:04,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7102f38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04, skipping insertion in model container [2021-10-16 03:19:04,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:19:04,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:19:04,339 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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-10-16 03:19:04,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:19:04,353 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:19:04,375 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_5748d8b0-ee2a-4ef5-94d5-88113bd57476/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-10-16 03:19:04,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:19:04,392 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:19:04,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04 WrapperNode [2021-10-16 03:19:04,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:19:04,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:19:04,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:19:04,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:19:04,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:19:04,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:19:04,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:19:04,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:19:04,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:19:04,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:19:04,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:19:04,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:19:04,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (1/1) ... [2021-10-16 03:19:04,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:19:04,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:19:04,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:19:04,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:19:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:19:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:19:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 03:19:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:19:04,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:19:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:19:04,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 03:19:04,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:19:04,932 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 03:19:04,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:04 BoogieIcfgContainer [2021-10-16 03:19:04,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:19:04,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:19:04,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:19:04,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:19:04,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:19:04" (1/3) ... [2021-10-16 03:19:04,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63250b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:19:04, skipping insertion in model container [2021-10-16 03:19:04,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:04" (2/3) ... [2021-10-16 03:19:04,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63250b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:19:04, skipping insertion in model container [2021-10-16 03:19:04,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:04" (3/3) ... [2021-10-16 03:19:04,946 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2021-10-16 03:19:04,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:19:04,954 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:19:05,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:19:05,036 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 03:19:05,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:19:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 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 03:19:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 03:19:05,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:05,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:19:05,090 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:19:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:05,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2021-10-16 03:19:05,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:19:05,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433563591] [2021-10-16 03:19:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:05,130 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:19:05,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:19:05,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:19:05,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:19:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 03:19:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:05,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:05,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:19:05,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433563591] [2021-10-16 03:19:05,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433563591] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:19:05,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:19:05,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:19:05,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917156149] [2021-10-16 03:19:05,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:19:05,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:19:05,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:19:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:19:05,476 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:19:05,495 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-10-16 03:19:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:19:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 03:19:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:19:05,508 INFO L225 Difference]: With dead ends: 30 [2021-10-16 03:19:05,508 INFO L226 Difference]: Without dead ends: 13 [2021-10-16 03:19:05,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:19:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-16 03:19:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-16 03:19:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-16 03:19:05,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-10-16 03:19:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:19:05,558 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-16 03:19:05,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:05,559 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-16 03:19:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:19:05,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:05,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:19:05,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:05,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:19:05,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:19:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2021-10-16 03:19:05,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:19:05,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352653115] [2021-10-16 03:19:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:05,779 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:19:05,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:19:05,785 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:19:05,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:19:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:05,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 03:19:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:05,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:06,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:19:06,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352653115] [2021-10-16 03:19:06,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352653115] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:19:06,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:19:06,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 03:19:06,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616748529] [2021-10-16 03:19:06,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:19:06,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:19:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:19:06,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:19:06,073 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:19:06,108 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-16 03:19:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:19:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 03:19:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:19:06,110 INFO L225 Difference]: With dead ends: 25 [2021-10-16 03:19:06,111 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 03:19:06,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:19:06,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 03:19:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 03:19:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-16 03:19:06,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-10-16 03:19:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:19:06,119 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-16 03:19:06,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-16 03:19:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 03:19:06,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:06,121 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:19:06,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:06,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:19:06,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:19:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 1 times [2021-10-16 03:19:06,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:19:06,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598759665] [2021-10-16 03:19:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:06,338 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:19:06,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:19:06,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:19:06,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:19:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:19:06,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:06,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:06,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:19:06,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598759665] [2021-10-16 03:19:06,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598759665] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:06,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [785367885] [2021-10-16 03:19:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:06,714 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:19:06,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:19:06,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:19:06,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 03:19:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:06,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:19:06,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:06,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:07,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [785367885] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:07,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372251363] [2021-10-16 03:19:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:07,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:19:07,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:19:07,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:19:07,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 03:19:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:07,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:19:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:07,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:07,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372251363] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:07,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:19:07,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-16 03:19:07,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309671792] [2021-10-16 03:19:07,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:19:07,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:19:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:19:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:19:07,328 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:19:07,488 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-10-16 03:19:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:19:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 15 [2021-10-16 03:19:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:19:07,490 INFO L225 Difference]: With dead ends: 33 [2021-10-16 03:19:07,490 INFO L226 Difference]: Without dead ends: 24 [2021-10-16 03:19:07,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:19:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-16 03:19:07,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-16 03:19:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-16 03:19:07,498 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2021-10-16 03:19:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:19:07,499 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-16 03:19:07,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-16 03:19:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 03:19:07,501 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:07,501 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:19:07,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:07,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:07,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:08,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:19:08,104 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:19:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 2 times [2021-10-16 03:19:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:19:08,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372256342] [2021-10-16 03:19:08,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:19:08,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:19:08,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:19:08,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:19:08,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 03:19:08,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:19:08,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:19:08,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:19:08,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:08,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:08,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:19:08,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372256342] [2021-10-16 03:19:08,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372256342] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:08,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [987764349] [2021-10-16 03:19:08,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:19:08,798 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:19:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:19:08,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:19:08,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 03:19:09,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:19:09,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:19:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:19:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:09,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:09,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [987764349] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:09,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388353220] [2021-10-16 03:19:09,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:19:09,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:19:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:19:09,256 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:19:09,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 03:19:09,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:19:09,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:19:09,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:19:09,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:09,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:09,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388353220] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:09,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:19:09,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-10-16 03:19:09,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593444554] [2021-10-16 03:19:09,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 03:19:09,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:19:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 03:19:09,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-16 03:19:09,692 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:19:10,352 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2021-10-16 03:19:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:19:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 23 [2021-10-16 03:19:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:19:10,358 INFO L225 Difference]: With dead ends: 49 [2021-10-16 03:19:10,358 INFO L226 Difference]: Without dead ends: 40 [2021-10-16 03:19:10,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:19:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-16 03:19:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-16 03:19:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-16 03:19:10,367 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 23 [2021-10-16 03:19:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:19:10,368 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-16 03:19:10,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-16 03:19:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-16 03:19:10,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:10,370 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:19:10,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-16 03:19:10,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-16 03:19:10,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:10,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:19:10,986 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:19:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:10,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 3 times [2021-10-16 03:19:10,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:19:10,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859298128] [2021-10-16 03:19:10,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 03:19:10,987 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:19:10,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:19:10,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:19:10,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 03:19:11,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-16 03:19:11,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:19:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 03:19:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:11,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:12,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:19:12,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859298128] [2021-10-16 03:19:12,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859298128] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:12,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2032790241] [2021-10-16 03:19:12,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 03:19:12,522 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:19:12,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:19:12,523 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:19:12,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 03:19:13,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-16 03:19:13,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:19:13,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 03:19:13,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:13,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:15,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2032790241] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:15,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401848331] [2021-10-16 03:19:15,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 03:19:15,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:19:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:19:15,619 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:19:15,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 03:19:43,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-16 03:19:43,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:19:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 03:19:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:44,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:44,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401848331] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:44,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:19:44,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 18, 17, 18] total 46 [2021-10-16 03:19:44,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847515620] [2021-10-16 03:19:44,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-16 03:19:44,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:19:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-16 03:19:44,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1495, Unknown=0, NotChecked=0, Total=2070 [2021-10-16 03:19:44,484 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:19:49,058 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-10-16 03:19:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-16 03:19:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 states have internal predecessors, (97), 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 39 [2021-10-16 03:19:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:19:49,060 INFO L225 Difference]: With dead ends: 81 [2021-10-16 03:19:49,061 INFO L226 Difference]: Without dead ends: 72 [2021-10-16 03:19:49,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 5750.1ms TimeCoverageRelationStatistics Valid=1036, Invalid=2746, Unknown=0, NotChecked=0, Total=3782 [2021-10-16 03:19:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-16 03:19:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-16 03:19:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-10-16 03:19:49,078 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 39 [2021-10-16 03:19:49,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:19:49,078 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-10-16 03:19:49,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-10-16 03:19:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-16 03:19:49,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:49,081 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:19:49,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:49,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:49,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:49,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:19:49,710 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:19:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 4 times [2021-10-16 03:19:49,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:19:49,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106733753] [2021-10-16 03:19:49,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 03:19:49,712 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:19:49,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:19:49,717 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:19:49,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 03:19:50,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 03:19:50,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 03:19:50,174 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:19:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:19:50,586 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 03:19:50,586 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:19:50,587 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:19:50,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:50,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:19:50,813 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:19:50,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:19:50 BoogieIcfgContainer [2021-10-16 03:19:50,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:19:50,881 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:19:50,881 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:19:50,881 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:19:50,882 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:04" (3/4) ... [2021-10-16 03:19:50,884 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:19:50,993 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:19:50,997 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:19:50,999 INFO L168 Benchmark]: Toolchain (without parser) took 46930.45 ms. Allocated memory was 52.4 MB in the beginning and 81.8 MB in the end (delta: 29.4 MB). Free memory was 29.5 MB in the beginning and 50.4 MB in the end (delta: -21.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,000 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 52.4 MB. Free memory was 33.2 MB in the beginning and 33.2 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:19:51,005 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.81 ms. Allocated memory is still 52.4 MB. Free memory was 29.2 MB in the beginning and 30.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.16 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 30.4 MB in the beginning and 50.5 MB in the end (delta: -20.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,006 INFO L168 Benchmark]: Boogie Preprocessor took 58.92 ms. Allocated memory is still 67.1 MB. Free memory was 50.3 MB in the beginning and 49.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:19:51,006 INFO L168 Benchmark]: RCFGBuilder took 400.06 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 38.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,007 INFO L168 Benchmark]: TraceAbstraction took 45942.94 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 38.2 MB in the beginning and 54.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,007 INFO L168 Benchmark]: Witness Printer took 116.23 ms. Allocated memory is still 81.8 MB. Free memory was 54.6 MB in the beginning and 50.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 52.4 MB. Free memory was 33.2 MB in the beginning and 33.2 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.81 ms. Allocated memory is still 52.4 MB. Free memory was 29.2 MB in the beginning and 30.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 80.16 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 30.4 MB in the beginning and 50.5 MB in the end (delta: -20.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.92 ms. Allocated memory is still 67.1 MB. Free memory was 50.3 MB in the beginning and 49.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 400.06 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 38.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45942.94 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 38.2 MB in the beginning and 54.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. * Witness Printer took 116.23 ms. Allocated memory is still 81.8 MB. Free memory was 54.6 MB in the beginning and 50.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] COND TRUE !check(ad1, i) [L39] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 45786.1ms, OverallIterations: 6, TraceHistogramMax: 20, EmptinessCheckTime: 32.5ms, AutomataDifference: 5532.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 66 SDtfs, 216 SDslu, 304 SDs, 0 SdLazy, 569 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 846.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 506 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 6545.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=5, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 206.6ms SsaConstructionTime, 30042.8ms SatisfiabilityAnalysisTime, 5566.4ms InterpolantComputationTime, 303 NumberOfCodeBlocks, 303 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 482 ConstructedInterpolants, 0 QuantifiedInterpolants, 1688 SizeOfPredicates, 10 NumberOfNonLiveVariables, 747 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/1416 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 03:19:51,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5748d8b0-ee2a-4ef5-94d5-88113bd57476/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...