./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8 --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 c8ffdb7e52f13c5228ce15f1d79a563f57556d0a ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8 --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 c8ffdb7e52f13c5228ce15f1d79a563f57556d0a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-4e77c04 [2021-10-13 08:03:17,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:03:17,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:03:17,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:03:17,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:03:17,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:03:17,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:03:17,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:03:17,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:03:17,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:03:17,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:03:17,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:03:17,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:03:17,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:03:17,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:03:17,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:03:17,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:03:17,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:03:17,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:03:17,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:03:17,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:03:17,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:03:17,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:03:17,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:03:17,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:03:17,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:03:17,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:03:17,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:03:17,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:03:17,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:03:17,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:03:17,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:03:17,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:03:17,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:03:17,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:03:17,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:03:17,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:03:17,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:03:17,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:03:17,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:03:17,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:03:17,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:03:18,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:03:18,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:03:18,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:03:18,033 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:03:18,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:03:18,034 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:03:18,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:03:18,034 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:03:18,035 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:03:18,035 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:03:18,036 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:03:18,037 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:03:18,037 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:03:18,038 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:03:18,038 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:03:18,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:03:18,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:03:18,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:03:18,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:03:18,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:03:18,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:03:18,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:03:18,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:03:18,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:03:18,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:03:18,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:03:18,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:03:18,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:03:18,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:03:18,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:03:18,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:03:18,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:03:18,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:03:18,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:03:18,046 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:03:18,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:03:18,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:03:18,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:03:18,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:03:18,048 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_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ffdb7e52f13c5228ce15f1d79a563f57556d0a [2021-10-13 08:03:18,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:03:18,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:03:18,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:03:18,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:03:18,376 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:03:18,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-10-13 08:03:18,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data/3022eb155/dba34d5089ff4da5a80b6616c089eb23/FLAGbfd166a16 [2021-10-13 08:03:19,002 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:03:19,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-10-13 08:03:19,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data/3022eb155/dba34d5089ff4da5a80b6616c089eb23/FLAGbfd166a16 [2021-10-13 08:03:19,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data/3022eb155/dba34d5089ff4da5a80b6616c089eb23 [2021-10-13 08:03:19,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:03:19,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:03:19,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:03:19,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:03:19,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:03:19,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579b906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19, skipping insertion in model container [2021-10-13 08:03:19,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:03:19,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:03:19,594 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_e461c7c9-888a-4453-8530-ed9aba7dfb30/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2021-10-13 08:03:19,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:03:19,635 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:03:19,661 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_e461c7c9-888a-4453-8530-ed9aba7dfb30/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2021-10-13 08:03:19,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:03:19,700 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:03:19,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19 WrapperNode [2021-10-13 08:03:19,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:03:19,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:03:19,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:03:19,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:03:19,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:03:19,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:03:19,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:03:19,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:03:19,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:03:19,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:03:19,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:03:19,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:03:19,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (1/1) ... [2021-10-13 08:03:19,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:03:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:19,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:03:19,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:03:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:03:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:03:19,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:03:19,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:03:20,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:03:20,350 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 08:03:20,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:20 BoogieIcfgContainer [2021-10-13 08:03:20,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:03:20,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:03:20,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:03:20,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:03:20,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:19" (1/3) ... [2021-10-13 08:03:20,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1f2805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:20, skipping insertion in model container [2021-10-13 08:03:20,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:19" (2/3) ... [2021-10-13 08:03:20,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1f2805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:20, skipping insertion in model container [2021-10-13 08:03:20,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:20" (3/3) ... [2021-10-13 08:03:20,362 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2021-10-13 08:03:20,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:03:20,369 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 08:03:20,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:03:20,430 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 [2021-10-13 08:03:20,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 08:03:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:03:20,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:20,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:03:20,452 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:20,458 INFO L82 PathProgramCache]: Analyzing trace with hash 100327247, now seen corresponding path program 1 times [2021-10-13 08:03:20,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:03:20,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924600110] [2021-10-13 08:03:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:20,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:03:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:20,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:03:20,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924600110] [2021-10-13 08:03:20,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924600110] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:20,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:20,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:03:20,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98983628] [2021-10-13 08:03:20,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:03:20,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:03:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:03:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:03:20,699 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:20,718 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-10-13 08:03:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:03:20,719 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:03:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:20,726 INFO L225 Difference]: With dead ends: 25 [2021-10-13 08:03:20,726 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 08:03:20,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:03:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 08:03:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 08:03:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-13 08:03:20,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2021-10-13 08:03:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:20,756 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-13 08:03:20,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-13 08:03:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-13 08:03:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:03:20,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:20,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:03:20,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:03:20,758 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash 99468274, now seen corresponding path program 1 times [2021-10-13 08:03:20,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:03:20,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588739589] [2021-10-13 08:03:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:20,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:03:20,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:03:20,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056437817] [2021-10-13 08:03:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:20,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:20,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:20,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:03:20,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:03:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:03:20,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:21,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:21,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:03:21,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588739589] [2021-10-13 08:03:21,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:03:21,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056437817] [2021-10-13 08:03:21,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056437817] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:21,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:21,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:03:21,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916073731] [2021-10-13 08:03:21,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:03:21,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:03:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:03:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:03:21,175 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:21,225 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-13 08:03:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:03:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:03:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:21,227 INFO L225 Difference]: With dead ends: 25 [2021-10-13 08:03:21,227 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 08:03:21,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:03:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 08:03:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-10-13 08:03:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-13 08:03:21,233 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5 [2021-10-13 08:03:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:21,233 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-13 08:03:21,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-13 08:03:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:03:21,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:21,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:03:21,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:21,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-13 08:03:21,450 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:21,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:21,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1211488473, now seen corresponding path program 1 times [2021-10-13 08:03:21,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:03:21,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950610993] [2021-10-13 08:03:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:21,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:03:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:21,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:03:21,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950610993] [2021-10-13 08:03:21,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950610993] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:21,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:21,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:03:21,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414496927] [2021-10-13 08:03:21,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:03:21,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:03:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:03:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:03:21,532 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:21,547 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-13 08:03:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:03:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 08:03:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:21,558 INFO L225 Difference]: With dead ends: 18 [2021-10-13 08:03:21,558 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 08:03:21,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:03:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 08:03:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 08:03:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-13 08:03:21,562 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-10-13 08:03:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:21,563 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-13 08:03:21,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 08:03:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-13 08:03:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:03:21,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:21,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:21,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:03:21,565 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -263176832, now seen corresponding path program 1 times [2021-10-13 08:03:21,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:03:21,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832167857] [2021-10-13 08:03:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:21,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:03:21,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:03:21,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963320285] [2021-10-13 08:03:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:21,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:21,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:03:21,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:03:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:21,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:03:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:21,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:22,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:03:22,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832167857] [2021-10-13 08:03:22,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:03:22,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963320285] [2021-10-13 08:03:22,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963320285] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:22,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:22,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-13 08:03:22,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352243462] [2021-10-13 08:03:22,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:03:22,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:03:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:03:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:03:22,029 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-10-13 08:03:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:22,153 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-13 08:03:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:03:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 08:03:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:22,154 INFO L225 Difference]: With dead ends: 18 [2021-10-13 08:03:22,154 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 08:03:22,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:03:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 08:03:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-13 08:03:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2021-10-13 08:03:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-13 08:03:22,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-13 08:03:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:22,161 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-13 08:03:22,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-10-13 08:03:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-13 08:03:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:03:22,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:22,163 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:22,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:22,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:22,382 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1349036158, now seen corresponding path program 1 times [2021-10-13 08:03:22,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:03:22,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722768330] [2021-10-13 08:03:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:22,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:03:22,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:03:22,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683270837] [2021-10-13 08:03:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:22,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:22,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:22,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:03:22,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 08:03:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:03:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:22,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:22,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:03:22,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722768330] [2021-10-13 08:03:22,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:03:22,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683270837] [2021-10-13 08:03:22,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683270837] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:22,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639110409] [2021-10-13 08:03:22,615 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-13 08:03:22,616 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:03:22,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:03:22,628 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:03:22,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:03:22,682 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.1 percent of original size [2021-10-13 08:03:22,693 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:03:22,694 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:22,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:03:22,699 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:03:22,700 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:22,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:03:22,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-13 08:03:22,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-13 08:03:22,772 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:22,773 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:03:22,774 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:22,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:03:22,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:03:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:03:22,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:03:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:03:22,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 08:03:22,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:22,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:03:22,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:22,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:03:22,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 08:03:22,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:03:22,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:22,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:22,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 159 [2021-10-13 08:03:22,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:03:22,902 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:312, output treesize:159 [2021-10-13 08:03:22,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:23,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:23,128 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_22| 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) [2021-10-13 08:03:23,134 INFO L168 Benchmark]: Toolchain (without parser) took 3767.49 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 61.1 MB in the beginning and 45.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,134 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 70.7 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:03:23,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.88 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 60.8 MB in the beginning and 92.6 MB in the end (delta: -31.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.55 ms. Allocated memory is still 119.5 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,136 INFO L168 Benchmark]: Boogie Preprocessor took 37.49 ms. Allocated memory is still 119.5 MB. Free memory was 91.3 MB in the beginning and 90.4 MB in the end (delta: 859.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:03:23,137 INFO L168 Benchmark]: RCFGBuilder took 561.90 ms. Allocated memory is still 119.5 MB. Free memory was 90.4 MB in the beginning and 76.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,137 INFO L168 Benchmark]: TraceAbstraction took 2776.47 ms. Allocated memory is still 119.5 MB. Free memory was 75.7 MB in the beginning and 45.6 MB in the end (delta: 30.1 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,141 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 70.7 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 334.88 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 60.8 MB in the beginning and 92.6 MB in the end (delta: -31.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.55 ms. Allocated memory is still 119.5 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.49 ms. Allocated memory is still 119.5 MB. Free memory was 91.3 MB in the beginning and 90.4 MB in the end (delta: 859.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 561.90 ms. Allocated memory is still 119.5 MB. Free memory was 90.4 MB in the beginning and 76.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2776.47 ms. Allocated memory is still 119.5 MB. Free memory was 75.7 MB in the beginning and 45.6 MB in the end (delta: 30.1 MB). Peak memory consumption was 32.6 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_22| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_22|: 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. [2021-10-13 08:03:23,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 08:03:26,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:03:26,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:03:26,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:03:26,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:03:26,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:03:26,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:03:26,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:03:26,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:03:26,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:03:26,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:03:26,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:03:26,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:03:26,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:03:26,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:03:26,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:03:26,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:03:26,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:03:26,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:03:26,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:03:26,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:03:26,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:03:26,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:03:26,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:03:26,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:03:26,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:03:26,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:03:26,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:03:26,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:03:26,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:03:26,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:03:26,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:03:26,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:03:26,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:03:26,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:03:26,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:03:26,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:03:26,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:03:26,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:03:26,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:03:26,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:03:26,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:03:26,454 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:03:26,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:03:26,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:03:26,456 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:03:26,456 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:03:26,457 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:03:26,457 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:03:26,457 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:03:26,458 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:03:26,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:03:26,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:03:26,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:03:26,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:03:26,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:03:26,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:03:26,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:03:26,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:03:26,463 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:03:26,463 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:03:26,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:03:26,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:03:26,464 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:03:26,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:03:26,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:03:26,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:03:26,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:03:26,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:03:26,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:03:26,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:03:26,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:03:26,466 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:03:26,466 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:03:26,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:03:26,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:03:26,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:03:26,467 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_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ffdb7e52f13c5228ce15f1d79a563f57556d0a [2021-10-13 08:03:26,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:03:26,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:03:26,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:03:26,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:03:26,974 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:03:26,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-10-13 08:03:27,060 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data/4e975b019/33aae8199ef148f0921d9979119e4d8c/FLAGc637a9265 [2021-10-13 08:03:27,721 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:03:27,722 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-10-13 08:03:27,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data/4e975b019/33aae8199ef148f0921d9979119e4d8c/FLAGc637a9265 [2021-10-13 08:03:28,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/data/4e975b019/33aae8199ef148f0921d9979119e4d8c [2021-10-13 08:03:28,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:03:28,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:03:28,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:03:28,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:03:28,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:03:28,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67534e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28, skipping insertion in model container [2021-10-13 08:03:28,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:03:28,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:03:28,255 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_e461c7c9-888a-4453-8530-ed9aba7dfb30/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2021-10-13 08:03:28,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:03:28,285 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:03:28,322 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_e461c7c9-888a-4453-8530-ed9aba7dfb30/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2021-10-13 08:03:28,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:03:28,374 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:03:28,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28 WrapperNode [2021-10-13 08:03:28,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:03:28,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:03:28,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:03:28,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:03:28,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:03:28,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:03:28,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:03:28,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:03:28,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:03:28,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:03:28,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:03:28,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:03:28,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2021-10-13 08:03:28,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:03:28,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:28,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:03:28,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:03:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:03:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:03:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:03:28,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:03:28,871 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:03:28,871 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 08:03:28,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:28 BoogieIcfgContainer [2021-10-13 08:03:28,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:03:28,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:03:28,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:03:28,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:03:28,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:28" (1/3) ... [2021-10-13 08:03:28,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbfb22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:28, skipping insertion in model container [2021-10-13 08:03:28,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (2/3) ... [2021-10-13 08:03:28,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbfb22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:28, skipping insertion in model container [2021-10-13 08:03:28,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:28" (3/3) ... [2021-10-13 08:03:28,885 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2021-10-13 08:03:28,891 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:03:28,892 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 08:03:28,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:03:28,987 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 [2021-10-13 08:03:28,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 08:03:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 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) [2021-10-13 08:03:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:03:29,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:29,036 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:29,037 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:29,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-10-13 08:03:29,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:29,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280424932] [2021-10-13 08:03:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:29,061 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:29,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:29,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:03:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:03:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:29,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:29,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:29,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280424932] [2021-10-13 08:03:29,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280424932] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:29,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:29,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:03:29,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92486198] [2021-10-13 08:03:29,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:03:29,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:03:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:03:29,379 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 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) [2021-10-13 08:03:29,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:29,398 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-13 08:03:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:03:29,400 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 [2021-10-13 08:03:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:29,410 INFO L225 Difference]: With dead ends: 39 [2021-10-13 08:03:29,411 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 08:03:29,414 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 [2021-10-13 08:03:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 08:03:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 08:03:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-10-13 08:03:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 08:03:29,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-10-13 08:03:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:29,456 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 08:03:29,457 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) [2021-10-13 08:03:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 08:03:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:03:29,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:29,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:29,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:29,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:03:29,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-13 08:03:29,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:29,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332970715] [2021-10-13 08:03:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:29,674 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:29,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:29,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:29,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:03:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:03:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:30,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:30,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:30,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332970715] [2021-10-13 08:03:30,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332970715] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:30,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:30,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-13 08:03:30,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521697596] [2021-10-13 08:03:30,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:03:30,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:03:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:03:30,372 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-10-13 08:03:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:33,676 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-10-13 08:03:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:03:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 [2021-10-13 08:03:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:33,689 INFO L225 Difference]: With dead ends: 41 [2021-10-13 08:03:33,689 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 08:03:33,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:03:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 08:03:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2021-10-13 08:03:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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) [2021-10-13 08:03:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-13 08:03:33,703 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2021-10-13 08:03:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:33,704 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-13 08:03:33,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-10-13 08:03:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-13 08:03:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:03:33,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:33,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:33,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:33,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:03:33,911 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-10-13 08:03:33,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:33,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614210987] [2021-10-13 08:03:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:33,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:33,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:33,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:33,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:03:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:33,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:03:33,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:34,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:34,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:34,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614210987] [2021-10-13 08:03:34,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614210987] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:34,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:34,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 08:03:34,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377762704] [2021-10-13 08:03:34,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:03:34,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:03:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:03:34,150 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-10-13 08:03:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:34,295 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-10-13 08:03:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:03:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 [2021-10-13 08:03:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:34,299 INFO L225 Difference]: With dead ends: 39 [2021-10-13 08:03:34,299 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 08:03:34,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:03:34,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 08:03:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-10-13 08:03:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 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) [2021-10-13 08:03:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-10-13 08:03:34,312 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2021-10-13 08:03:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:34,312 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-10-13 08:03:34,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-10-13 08:03:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-10-13 08:03:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:03:34,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:34,314 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:34,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:34,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:03:34,524 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:34,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-10-13 08:03:34,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:34,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221220048] [2021-10-13 08:03:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:34,526 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:34,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:34,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:34,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:03:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:34,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:03:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:35,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:35,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:35,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221220048] [2021-10-13 08:03:35,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221220048] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:35,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:35,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-10-13 08:03:35,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110286513] [2021-10-13 08:03:35,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:03:35,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:35,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:03:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:03:35,807 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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) [2021-10-13 08:03:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:37,530 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-13 08:03:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 08:03:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 13 [2021-10-13 08:03:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:37,536 INFO L225 Difference]: With dead ends: 39 [2021-10-13 08:03:37,537 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 08:03:37,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1569.8ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-10-13 08:03:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 08:03:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-13 08:03:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 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) [2021-10-13 08:03:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-10-13 08:03:37,548 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 13 [2021-10-13 08:03:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:37,549 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-10-13 08:03:37,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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) [2021-10-13 08:03:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-10-13 08:03:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:03:37,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:37,551 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:37,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:37,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:03:37,765 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash -558465920, now seen corresponding path program 1 times [2021-10-13 08:03:37,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:37,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911332800] [2021-10-13 08:03:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:37,767 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:37,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:37,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:37,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:03:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:37,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:03:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:38,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:39,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:39,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911332800] [2021-10-13 08:03:39,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911332800] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:39,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [229873266] [2021-10-13 08:03:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:39,836 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:03:39,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:03:39,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:03:39,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 08:03:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:40,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:03:40,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:40,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:40,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [229873266] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:40,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317275285] [2021-10-13 08:03:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:40,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:40,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:40,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:03:40,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 08:03:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:03:41,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:41,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:53,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317275285] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:53,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:03:53,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5, 5, 10, 6] total 20 [2021-10-13 08:03:53,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889613073] [2021-10-13 08:03:53,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 08:03:53,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 08:03:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=280, Unknown=5, NotChecked=0, Total=380 [2021-10-13 08:03:53,258 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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) [2021-10-13 08:04:08,670 WARN L207 SmtUtils]: Spent 13.95 s on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-10-13 08:04:22,247 WARN L207 SmtUtils]: Spent 12.27 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-10-13 08:04:41,761 WARN L207 SmtUtils]: Spent 13.88 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-10-13 08:04:54,369 WARN L207 SmtUtils]: Spent 12.29 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-10-13 08:05:08,049 WARN L207 SmtUtils]: Spent 13.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-10-13 08:05:25,169 WARN L207 SmtUtils]: Spent 16.78 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-10-13 08:05:38,753 WARN L207 SmtUtils]: Spent 13.11 s on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-10-13 08:06:00,631 WARN L207 SmtUtils]: Spent 16.67 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-10-13 08:06:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:00,692 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-10-13 08:06:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 08:06:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 [2021-10-13 08:06:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:00,697 INFO L225 Difference]: With dead ends: 83 [2021-10-13 08:06:00,697 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 08:06:00,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 127783.1ms TimeCoverageRelationStatistics Valid=379, Invalid=948, Unknown=5, NotChecked=0, Total=1332 [2021-10-13 08:06:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 08:06:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2021-10-13 08:06:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.325) internal successors, (53), 41 states have internal predecessors, (53), 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) [2021-10-13 08:06:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-10-13 08:06:00,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 15 [2021-10-13 08:06:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:00,711 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-10-13 08:06:00,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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) [2021-10-13 08:06:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-10-13 08:06:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 08:06:00,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:00,713 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:00,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:00,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:01,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:01,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:06:01,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:06:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:01,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1449988658, now seen corresponding path program 1 times [2021-10-13 08:06:01,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:01,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607008611] [2021-10-13 08:06:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:01,327 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:01,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:01,329 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:01,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:06:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:06:01,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:02,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:06:03,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:03,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607008611] [2021-10-13 08:06:03,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607008611] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:06:03,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:06:03,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-10-13 08:06:03,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834466753] [2021-10-13 08:06:03,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:06:03,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:03,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:06:03,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:06:03,325 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-13 08:06:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:04,162 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-10-13 08:06:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:06:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) Word has length 18 [2021-10-13 08:06:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:04,164 INFO L225 Difference]: With dead ends: 46 [2021-10-13 08:06:04,164 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 08:06:04,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1357.8ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:06:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 08:06:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-13 08:06:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 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) [2021-10-13 08:06:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-10-13 08:06:04,181 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 18 [2021-10-13 08:06:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:04,182 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-10-13 08:06:04,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-13 08:06:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-10-13 08:06:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:06:04,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:04,183 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:04,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:04,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:04,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:06:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 1 times [2021-10-13 08:06:04,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:04,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577615195] [2021-10-13 08:06:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:04,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:04,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:04,394 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:04,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:06:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:04,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:06:04,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:04,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:04,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:04,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577615195] [2021-10-13 08:06:04,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577615195] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:04,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1823983201] [2021-10-13 08:06:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:04,894 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:06:04,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:06:04,899 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:06:04,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 08:06:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:05,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:06:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:05,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:05,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1823983201] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:05,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694084658] [2021-10-13 08:06:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:05,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:06:05,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:06:05,501 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:06:05,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 08:06:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:06:05,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:05,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:05,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694084658] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:05,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:06:05,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-13 08:06:05,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801485281] [2021-10-13 08:06:05,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:06:05,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:06:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:06:05,941 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-10-13 08:06:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:06,386 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2021-10-13 08:06:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 08:06:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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 21 [2021-10-13 08:06:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:06,388 INFO L225 Difference]: With dead ends: 96 [2021-10-13 08:06:06,388 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 08:06:06,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:06:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 08:06:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-10-13 08:06:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 87 states have internal predecessors, (105), 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) [2021-10-13 08:06:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2021-10-13 08:06:06,412 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 21 [2021-10-13 08:06:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:06,413 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2021-10-13 08:06:06,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-10-13 08:06:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2021-10-13 08:06:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:06:06,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:06,415 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:06,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:06,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:06,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:07,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:06:07,038 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:06:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:07,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1513887678, now seen corresponding path program 1 times [2021-10-13 08:06:07,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:07,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172375605] [2021-10-13 08:06:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:07,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:07,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:07,040 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:07,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 08:06:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:06:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:07,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:07,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:07,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172375605] [2021-10-13 08:06:07,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172375605] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:07,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62149949] [2021-10-13 08:06:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:07,601 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:06:07,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:06:07,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:06:07,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 08:06:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:07,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:06:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:08,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:08,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62149949] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:08,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832757158] [2021-10-13 08:06:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:08,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:06:08,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:06:08,152 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:06:08,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 08:06:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:08,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:06:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:08,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:08,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832757158] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:08,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:06:08,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 8 [2021-10-13 08:06:08,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900647734] [2021-10-13 08:06:08,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:06:08,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:06:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:06:08,678 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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) [2021-10-13 08:06:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:08,866 INFO L93 Difference]: Finished difference Result 157 states and 188 transitions. [2021-10-13 08:06:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:06:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 25 [2021-10-13 08:06:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:08,872 INFO L225 Difference]: With dead ends: 157 [2021-10-13 08:06:08,872 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 08:06:08,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:06:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 08:06:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2021-10-13 08:06:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 121 states have internal predecessors, (146), 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) [2021-10-13 08:06:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2021-10-13 08:06:08,922 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 25 [2021-10-13 08:06:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:08,923 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2021-10-13 08:06:08,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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) [2021-10-13 08:06:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2021-10-13 08:06:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:06:08,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:08,928 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:08,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-10-13 08:06:09,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:09,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:09,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:06:09,531 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:06:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:09,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1501215940, now seen corresponding path program 2 times [2021-10-13 08:06:09,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:09,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563042179] [2021-10-13 08:06:09,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:06:09,533 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:09,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:09,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 08:06:09,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:06:09,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:06:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 08:06:09,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:11,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:12,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:12,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563042179] [2021-10-13 08:06:12,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563042179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:12,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1293557499] [2021-10-13 08:06:12,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:06:12,623 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:06:12,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:06:12,624 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:06:12,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-13 08:06:13,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:06:13,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:06:13,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:06:13,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:14,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:14,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1293557499] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:14,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786522258] [2021-10-13 08:06:14,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:06:14,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:06:14,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:06:14,538 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:06:14,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 08:06:15,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:06:15,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:06:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 08:06:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:16,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786522258] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:16,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:06:16,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 14, 6, 14, 6] total 18 [2021-10-13 08:06:16,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7870126] [2021-10-13 08:06:16,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 08:06:16,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 08:06:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-10-13 08:06:16,482 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2021-10-13 08:06:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:35,839 INFO L93 Difference]: Finished difference Result 186 states and 221 transitions. [2021-10-13 08:06:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 08:06:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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 25 [2021-10-13 08:06:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:35,847 INFO L225 Difference]: With dead ends: 186 [2021-10-13 08:06:35,847 INFO L226 Difference]: Without dead ends: 139 [2021-10-13 08:06:35,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 3912.6ms TimeCoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2021-10-13 08:06:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-13 08:06:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2021-10-13 08:06:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.162162162162162) internal successors, (129), 112 states have internal predecessors, (129), 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) [2021-10-13 08:06:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-10-13 08:06:35,891 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 25 [2021-10-13 08:06:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:35,894 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-10-13 08:06:35,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2021-10-13 08:06:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-10-13 08:06:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:06:35,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:35,897 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:35,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:36,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:36,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:36,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:36,499 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:06:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1106341888, now seen corresponding path program 3 times [2021-10-13 08:06:36,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:36,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876861873] [2021-10-13 08:06:36,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:06:36,500 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:36,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:36,501 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:36,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 08:06:37,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 08:06:37,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:06:37,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:06:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:38,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:50,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:50,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876861873] [2021-10-13 08:06:50,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876861873] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:50,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392002884] [2021-10-13 08:06:50,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:06:50,776 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:06:50,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:06:50,777 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:06:50,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 08:06:51,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 08:06:51,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:06:51,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 08:06:51,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:52,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:52,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [392002884] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:52,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538725529] [2021-10-13 08:06:52,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:06:52,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:06:52,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:06:52,794 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:06:52,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 08:06:53,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 08:06:53,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:06:53,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:06:53,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:54,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:06:55,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538725529] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:55,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:06:55,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 12, 7, 12, 7] total 17 [2021-10-13 08:06:55,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945753124] [2021-10-13 08:06:55,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 08:06:55,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 08:06:55,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=205, Unknown=4, NotChecked=0, Total=272 [2021-10-13 08:06:55,189 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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) [2021-10-13 08:07:12,235 WARN L207 SmtUtils]: Spent 12.30 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-10-13 08:07:41,833 WARN L207 SmtUtils]: Spent 12.36 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-10-13 08:07:54,839 WARN L207 SmtUtils]: Spent 12.29 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-10-13 08:07:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:07:55,145 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2021-10-13 08:07:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 08:07:55,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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 25 [2021-10-13 08:07:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:07:55,147 INFO L225 Difference]: With dead ends: 159 [2021-10-13 08:07:55,147 INFO L226 Difference]: Without dead ends: 157 [2021-10-13 08:07:55,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 59541.0ms TimeCoverageRelationStatistics Valid=292, Invalid=696, Unknown=4, NotChecked=0, Total=992 [2021-10-13 08:07:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-13 08:07:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 96. [2021-10-13 08:07:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1263157894736842) internal successors, (107), 95 states have internal predecessors, (107), 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) [2021-10-13 08:07:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2021-10-13 08:07:55,169 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 25 [2021-10-13 08:07:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:07:55,170 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2021-10-13 08:07:55,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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) [2021-10-13 08:07:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2021-10-13 08:07:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 08:07:55,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:07:55,172 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:07:55,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 08:07:55,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:07:55,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-10-13 08:07:55,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:07:55,786 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:07:55,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:07:55,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 2 times [2021-10-13 08:07:55,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:07:55,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551710830] [2021-10-13 08:07:55,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:07:55,788 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:07:55,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:07:55,789 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:07:55,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 08:07:56,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:07:56,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:07:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:07:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:07:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:56,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:07:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:57,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:07:57,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551710830] [2021-10-13 08:07:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551710830] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:07:57,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [757547118] [2021-10-13 08:07:57,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:07:57,116 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:07:57,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:07:57,117 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:07:57,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-13 08:07:58,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:07:58,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:07:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:07:58,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:07:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:07:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:58,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [757547118] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:07:58,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240237312] [2021-10-13 08:07:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:07:58,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:07:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:07:58,482 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:07:58,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 08:07:59,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:07:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:07:59,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:07:59,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:07:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:59,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:07:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:59,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240237312] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:07:59,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:07:59,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 17 [2021-10-13 08:07:59,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678210655] [2021-10-13 08:07:59,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 08:07:59,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:07:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 08:07:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-13 08:07:59,562 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 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) [2021-10-13 08:08:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:01,320 INFO L93 Difference]: Finished difference Result 220 states and 270 transitions. [2021-10-13 08:08:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 08:08:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 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 41 [2021-10-13 08:08:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:01,324 INFO L225 Difference]: With dead ends: 220 [2021-10-13 08:08:01,324 INFO L226 Difference]: Without dead ends: 216 [2021-10-13 08:08:01,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1304.7ms TimeCoverageRelationStatistics Valid=409, Invalid=923, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 08:08:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-13 08:08:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-10-13 08:08:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.130232558139535) internal successors, (243), 215 states have internal predecessors, (243), 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) [2021-10-13 08:08:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 243 transitions. [2021-10-13 08:08:01,371 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 243 transitions. Word has length 41 [2021-10-13 08:08:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:01,374 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 243 transitions. [2021-10-13 08:08:01,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 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) [2021-10-13 08:08:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 243 transitions. [2021-10-13 08:08:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-13 08:08:01,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:01,382 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:01,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:01,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-13 08:08:01,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-10-13 08:08:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:01,999 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash -990240277, now seen corresponding path program 3 times [2021-10-13 08:08:02,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:02,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304998418] [2021-10-13 08:08:02,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:08:02,001 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:02,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:02,002 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:02,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 08:08:03,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 08:08:03,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:08:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 08:08:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:03,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:05,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:05,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304998418] [2021-10-13 08:08:05,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304998418] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:05,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1175550033] [2021-10-13 08:08:05,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:08:05,913 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:08:05,916 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:08:05,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-10-13 08:08:07,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 08:08:07,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:08:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 08:08:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:07,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:09,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1175550033] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:09,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891916760] [2021-10-13 08:08:09,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:08:09,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:09,251 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:09,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 08:08:10,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 08:08:10,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:08:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 08:08:10,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:10,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:11,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891916760] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:11,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:08:11,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17, 17, 17, 17] total 49 [2021-10-13 08:08:11,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573620100] [2021-10-13 08:08:11,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-13 08:08:11,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:11,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-13 08:08:11,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1828, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 08:08:11,244 INFO L87 Difference]: Start difference. First operand 216 states and 243 transitions. Second operand has 50 states, 50 states have (on average 4.68) internal successors, (234), 49 states have internal predecessors, (234), 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) [2021-10-13 08:08:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:20,788 INFO L93 Difference]: Finished difference Result 464 states and 569 transitions. [2021-10-13 08:08:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-13 08:08:20,791 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.68) internal successors, (234), 49 states have internal predecessors, (234), 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 81 [2021-10-13 08:08:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:20,794 INFO L225 Difference]: With dead ends: 464 [2021-10-13 08:08:20,795 INFO L226 Difference]: Without dead ends: 460 [2021-10-13 08:08:20,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 10468.8ms TimeCoverageRelationStatistics Valid=2094, Invalid=6462, Unknown=0, NotChecked=0, Total=8556 [2021-10-13 08:08:20,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-13 08:08:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 456. [2021-10-13 08:08:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.1384615384615384) internal successors, (518), 455 states have internal predecessors, (518), 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) [2021-10-13 08:08:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 518 transitions. [2021-10-13 08:08:20,873 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 518 transitions. Word has length 81 [2021-10-13 08:08:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:20,873 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 518 transitions. [2021-10-13 08:08:20,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.68) internal successors, (234), 49 states have internal predecessors, (234), 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) [2021-10-13 08:08:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 518 transitions. [2021-10-13 08:08:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-13 08:08:20,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:20,876 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:20,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:21,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:21,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:21,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:21,485 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:21,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1521977301, now seen corresponding path program 4 times [2021-10-13 08:08:21,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:21,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723433532] [2021-10-13 08:08:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 08:08:21,486 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:21,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:21,487 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:21,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 08:08:23,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 08:08:23,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 08:08:23,548 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:08:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:08:25,226 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:08:25,226 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:08:25,227 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:25,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:25,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:25,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:25,466 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:08:25,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:08:25 BoogieIcfgContainer [2021-10-13 08:08:25,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:08:25,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:08:25,637 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:08:25,637 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:08:25,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:28" (3/4) ... [2021-10-13 08:08:25,639 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:08:25,744 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:08:25,745 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:08:25,746 INFO L168 Benchmark]: Toolchain (without parser) took 297671.75 ms. Allocated memory was 56.6 MB in the beginning and 100.7 MB in the end (delta: 44.0 MB). Free memory was 35.0 MB in the beginning and 27.8 MB in the end (delta: 7.2 MB). Peak memory consumption was 51.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:25,747 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory is still 38.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:25,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.08 ms. Allocated memory is still 56.6 MB. Free memory was 34.9 MB in the beginning and 39.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:25,748 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.05 ms. Allocated memory is still 56.6 MB. Free memory was 39.7 MB in the beginning and 38.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:25,748 INFO L168 Benchmark]: Boogie Preprocessor took 44.52 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 37.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:25,749 INFO L168 Benchmark]: RCFGBuilder took 397.54 ms. Allocated memory is still 56.6 MB. Free memory was 36.8 MB in the beginning and 27.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:25,749 INFO L168 Benchmark]: TraceAbstraction took 296759.21 ms. Allocated memory was 56.6 MB in the beginning and 100.7 MB in the end (delta: 44.0 MB). Free memory was 26.5 MB in the beginning and 37.0 MB in the end (delta: -10.5 MB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:25,750 INFO L168 Benchmark]: Witness Printer took 108.59 ms. Allocated memory is still 100.7 MB. Free memory was 37.0 MB in the beginning and 27.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:25,752 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 56.6 MB. Free memory is still 38.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 299.08 ms. Allocated memory is still 56.6 MB. Free memory was 34.9 MB in the beginning and 39.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.05 ms. Allocated memory is still 56.6 MB. Free memory was 39.7 MB in the beginning and 38.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.52 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 37.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 397.54 ms. Allocated memory is still 56.6 MB. Free memory was 36.8 MB in the beginning and 27.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 296759.21 ms. Allocated memory was 56.6 MB in the beginning and 100.7 MB in the end (delta: 44.0 MB). Free memory was 26.5 MB in the beginning and 37.0 MB in the end (delta: -10.5 MB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. * Witness Printer took 108.59 ms. Allocated memory is still 100.7 MB. Free memory was 37.0 MB in the beginning and 27.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND FALSE !(counter++<20) [L16] COND TRUE !(cond) VAL [counter=21] [L18] reach_error() VAL [counter=21] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 296490.8ms, OverallIterations: 13, TraceHistogramMax: 21, EmptinessCheckTime: 60.3ms, AutomataDifference: 224829.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 260 SDtfs, 1233 SDslu, 1867 SDs, 0 SdLazy, 1313 SolverSat, 454 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 47866.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1620 GetRequests, 1326 SyntacticMatches, 5 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 206929.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=456occurred in iteration=12, InterpolantAutomatonStates: 214, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 340.6ms AutomataMinimizationTime, 12 MinimizatonAttempts, 158 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 277.8ms SsaConstructionTime, 6589.5ms SatisfiabilityAnalysisTime, 48778.9ms InterpolantComputationTime, 872 NumberOfCodeBlocks, 842 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 1470 ConstructedInterpolants, 7 QuantifiedInterpolants, 7911 SizeOfPredicates, 202 NumberOfNonLiveVariables, 2038 ConjunctsInSsa, 387 ConjunctsInUnsatCore, 52 InterpolantComputations, 9 PerfectInterpolantSequences, 270/3932 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! [2021-10-13 08:08:25,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e461c7c9-888a-4453-8530-ed9aba7dfb30/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...