./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF --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 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:34:13,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:34:13,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:34:13,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:34:13,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:34:13,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:34:13,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:34:13,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:34:13,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:34:13,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:34:13,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:34:13,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:34:13,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:34:13,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:34:13,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:34:13,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:34:13,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:34:13,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:34:13,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:34:13,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:34:13,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:34:13,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:34:13,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:34:13,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:34:13,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:34:13,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:34:13,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:34:13,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:34:13,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:34:13,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:34:13,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:34:13,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:34:13,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:34:13,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:34:13,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:34:13,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:34:13,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:34:13,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:34:13,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:34:13,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:34:13,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:34:13,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:34:13,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:34:13,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:34:13,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:34:13,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:34:13,929 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:34:13,929 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:34:13,929 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:34:13,930 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:34:13,930 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:34:13,930 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:34:13,931 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:34:13,931 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:34:13,932 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:34:13,932 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:34:13,932 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:34:13,932 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:34:13,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:34:13,934 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:34:13,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:34:13,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:34:13,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:34:13,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:34:13,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:34:13,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:34:13,935 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:34:13,935 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:34:13,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:34:13,936 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:34:13,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:34:13,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:34:13,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:34:13,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:13,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:34:13,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:34:13,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:34:13,939 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:34:13,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:34:13,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:34:13,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:34:13,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:34:13,940 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 [2021-11-13 01:34:14,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:34:14,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:34:14,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:34:14,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:34:14,241 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:34:14,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2021-11-13 01:34:14,325 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data/a6e3f45a4/03a9a4248ea342378bfa602c53bb7a44/FLAG4ff9bba6e [2021-11-13 01:34:14,976 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:34:14,977 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2021-11-13 01:34:14,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data/a6e3f45a4/03a9a4248ea342378bfa602c53bb7a44/FLAG4ff9bba6e [2021-11-13 01:34:15,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data/a6e3f45a4/03a9a4248ea342378bfa602c53bb7a44 [2021-11-13 01:34:15,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:34:15,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:34:15,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:15,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:34:15,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:34:15,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:15" (1/1) ... [2021-11-13 01:34:15,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd31a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:15, skipping insertion in model container [2021-11-13 01:34:15,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:15" (1/1) ... [2021-11-13 01:34:15,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:34:15,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:15,669 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2021-11-13 01:34:15,852 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2021-11-13 01:34:15,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:15,906 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 01:34:15,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63575fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:15, skipping insertion in model container [2021-11-13 01:34:15,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:15,914 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:34:15,917 INFO L158 Benchmark]: Toolchain (without parser) took 763.08ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 55.2MB in the beginning and 91.6MB in the end (delta: -36.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:34:15,918 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 94.4MB. Free memory was 66.6MB in the beginning and 66.6MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:34:15,921 INFO L158 Benchmark]: CACSL2BoogieTranslator took 760.22ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 55.1MB in the beginning and 91.6MB in the end (delta: -36.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:34:15,923 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 94.4MB. Free memory was 66.6MB in the beginning and 66.6MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 760.22ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 55.1MB in the beginning and 91.6MB in the end (delta: -36.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF --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 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:34:18,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:34:18,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:34:18,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:34:18,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:34:18,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:34:18,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:34:18,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:34:18,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:34:18,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:34:18,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:34:18,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:34:18,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:34:18,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:34:18,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:34:18,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:34:18,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:34:18,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:34:18,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:34:18,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:34:18,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:34:18,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:34:18,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:34:18,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:34:18,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:34:18,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:34:18,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:34:18,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:34:18,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:34:18,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:34:18,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:34:18,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:34:18,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:34:18,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:34:18,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:34:18,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:34:18,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:34:18,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:34:18,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:34:18,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:34:18,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:34:18,235 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:34:18,279 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:34:18,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:34:18,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:34:18,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:34:18,281 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:34:18,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:34:18,282 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:34:18,282 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:34:18,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:34:18,282 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:34:18,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:34:18,285 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:34:18,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:34:18,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:34:18,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:34:18,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:34:18,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:34:18,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:34:18,286 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:34:18,287 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:34:18,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:34:18,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:34:18,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:34:18,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:34:18,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:34:18,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:34:18,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:34:18,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:18,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:34:18,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:34:18,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:34:18,289 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:34:18,290 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:18,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:34:18,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:34:18,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:34:18,291 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 [2021-11-13 01:34:18,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:34:18,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:34:18,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:34:18,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:34:18,690 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:34:18,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2021-11-13 01:34:18,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data/02579649a/25410b0ebf744388b040504ddde97416/FLAG3d45e099e [2021-11-13 01:34:19,523 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:34:19,524 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2021-11-13 01:34:19,542 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data/02579649a/25410b0ebf744388b040504ddde97416/FLAG3d45e099e [2021-11-13 01:34:19,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/data/02579649a/25410b0ebf744388b040504ddde97416 [2021-11-13 01:34:19,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:34:19,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:34:19,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:19,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:34:19,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:34:19,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:19" (1/1) ... [2021-11-13 01:34:19,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f3e837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:19, skipping insertion in model container [2021-11-13 01:34:19,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:19" (1/1) ... [2021-11-13 01:34:19,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:34:19,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:20,281 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2021-11-13 01:34:20,474 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2021-11-13 01:34:20,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:20,513 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:34:20,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:20,561 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2021-11-13 01:34:20,697 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2021-11-13 01:34:20,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:20,737 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:34:20,786 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2021-11-13 01:34:20,896 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_1aa762a4-9c92-4b48-ba5a-2c712be4f419/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2021-11-13 01:34:20,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:20,971 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:34:20,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20 WrapperNode [2021-11-13 01:34:20,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:20,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:34:20,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:34:20,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:34:20,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:34:21,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:34:21,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:34:21,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:34:21,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:34:21,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:34:21,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:34:21,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:34:21,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (1/1) ... [2021-11-13 01:34:21,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:21,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:21,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:34:21,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:34:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:34:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:34:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:34:21,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:34:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 01:34:21,403 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 01:34:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 01:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:34:21,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:34:21,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:34:21,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:34:32,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:34:32,739 INFO L299 CfgBuilder]: Removed 100 assume(true) statements. [2021-11-13 01:34:32,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:34:32 BoogieIcfgContainer [2021-11-13 01:34:32,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:34:32,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:34:32,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:34:32,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:34:32,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:34:19" (1/3) ... [2021-11-13 01:34:32,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f99396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:34:32, skipping insertion in model container [2021-11-13 01:34:32,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:20" (2/3) ... [2021-11-13 01:34:32,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f99396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:34:32, skipping insertion in model container [2021-11-13 01:34:32,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:34:32" (3/3) ... [2021-11-13 01:34:32,750 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test5-3.i [2021-11-13 01:34:32,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:34:32,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 01:34:32,815 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:34:32,823 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, mAutomataTypeConcurrency=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 [2021-11-13 01:34:32,824 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 01:34:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 01:34:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 01:34:32,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:32,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:32,866 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-13 01:34:32,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:32,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202622757] [2021-11-13 01:34:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:32,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:32,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:32,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:32,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:34:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:33,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:34:33,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:33,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:33,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:33,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202622757] [2021-11-13 01:34:33,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202622757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:33,229 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:33,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:34:33,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118403005] [2021-11-13 01:34:33,233 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:33,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:34:33,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:34:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:34:33,279 INFO L87 Difference]: Start difference. First operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2021-11-13 01:34:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:33,365 INFO L93 Difference]: Finished difference Result 614 states and 1041 transitions. [2021-11-13 01:34:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:34:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 8 [2021-11-13 01:34:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:33,381 INFO L225 Difference]: With dead ends: 614 [2021-11-13 01:34:33,384 INFO L226 Difference]: Without dead ends: 254 [2021-11-13 01:34:33,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:34:33,398 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:33,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 5.13ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:34:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-13 01:34:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-13 01:34:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 01:34:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-13 01:34:33,465 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-13 01:34:33,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:33,465 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-13 01:34:33,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2021-11-13 01:34:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-13 01:34:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 01:34:33,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:33,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:33,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:33,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:33,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-13 01:34:33,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:33,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009648436] [2021-11-13 01:34:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:33,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:33,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:33,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:33,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:34:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:34:33,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:34,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:34,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:34,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009648436] [2021-11-13 01:34:34,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009648436] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:34,219 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:34,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:34:34,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985829887] [2021-11-13 01:34:34,220 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:34,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:34:34,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:34:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:34:34,222 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-13 01:34:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:34,551 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-13 01:34:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 42 [2021-11-13 01:34:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:34,557 INFO L225 Difference]: With dead ends: 575 [2021-11-13 01:34:34,557 INFO L226 Difference]: Without dead ends: 497 [2021-11-13 01:34:34,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:34:34,560 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 871 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.01ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 280.09ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:34,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 690 Invalid, 41 Unknown, 0 Unchecked, 9.01ms Time], IncrementalHoareTripleChecker [17 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 280.09ms Time] [2021-11-13 01:34:34,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-13 01:34:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-13 01:34:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:34:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-13 01:34:34,605 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-13 01:34:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:34,606 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-13 01:34:34,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-13 01:34:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-13 01:34:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-13 01:34:34,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:34,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:34,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:34,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:34,835 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-13 01:34:34,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:34,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717940022] [2021-11-13 01:34:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:34,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:34,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:34,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:34,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:34:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:35,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:34:36,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:34:36,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:36,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717940022] [2021-11-13 01:34:36,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717940022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:36,788 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:36,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:34:36,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340238137] [2021-11-13 01:34:36,789 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:36,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:34:36,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:36,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:34:36,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:36,791 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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) [2021-11-13 01:34:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:36,925 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-13 01:34:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:36,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 238 [2021-11-13 01:34:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:36,928 INFO L225 Difference]: With dead ends: 850 [2021-11-13 01:34:36,929 INFO L226 Difference]: Without dead ends: 433 [2021-11-13 01:34:36,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:36,931 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.69ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.10ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:36,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 3.69ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 98.10ms Time] [2021-11-13 01:34:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-13 01:34:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-13 01:34:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:34:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-13 01:34:36,956 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-13 01:34:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:36,957 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-13 01:34:36,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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) [2021-11-13 01:34:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-13 01:34:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-13 01:34:36,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:36,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:36,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:37,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:37,166 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-13 01:34:37,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:37,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015445508] [2021-11-13 01:34:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:37,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:37,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:37,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:34:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:34:38,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:34:39,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:39,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015445508] [2021-11-13 01:34:39,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015445508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:39,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:39,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:34:39,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880922198] [2021-11-13 01:34:39,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:39,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:39,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:34:39,360 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-11-13 01:34:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:39,733 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-13 01:34:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 238 [2021-11-13 01:34:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:39,745 INFO L225 Difference]: With dead ends: 807 [2021-11-13 01:34:39,745 INFO L226 Difference]: Without dead ends: 429 [2021-11-13 01:34:39,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:34:39,747 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 340.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 351.74ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:39,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 351.74ms Time] [2021-11-13 01:34:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-13 01:34:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-13 01:34:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:34:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-13 01:34:39,769 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-13 01:34:39,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:39,769 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-13 01:34:39,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-11-13 01:34:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-13 01:34:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-13 01:34:39,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:39,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:39,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:39,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:39,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash 733455842, now seen corresponding path program 1 times [2021-11-13 01:34:39,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:39,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353110690] [2021-11-13 01:34:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:39,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:39,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:39,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:34:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:40,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 01:34:41,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:34:41,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:41,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353110690] [2021-11-13 01:34:41,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353110690] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:41,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:34:41,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:34:41,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493478610] [2021-11-13 01:34:41,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:41,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:34:41,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:34:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:41,872 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:34:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:41,957 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-13 01:34:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-11-13 01:34:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:41,962 INFO L225 Difference]: With dead ends: 814 [2021-11-13 01:34:41,962 INFO L226 Difference]: Without dead ends: 432 [2021-11-13 01:34:41,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:41,965 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.69ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:41,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 53.69ms Time] [2021-11-13 01:34:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-13 01:34:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-13 01:34:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-13 01:34:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-13 01:34:41,987 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-13 01:34:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:41,988 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-13 01:34:41,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:34:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-13 01:34:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 01:34:41,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:41,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:42,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:42,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:42,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:42,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1488672828, now seen corresponding path program 1 times [2021-11-13 01:34:42,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:42,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446006565] [2021-11-13 01:34:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:42,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:42,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:42,216 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:42,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:34:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:34:43,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:34:44,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:44,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446006565] [2021-11-13 01:34:44,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446006565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:44,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [343658365] [2021-11-13 01:34:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:44,042 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:44,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:44,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:44,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 01:34:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:44,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:34:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 01:34:45,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 01:34:46,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [343658365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:46,067 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:46,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-13 01:34:46,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489780690] [2021-11-13 01:34:46,068 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:46,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:34:46,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:34:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:34:46,070 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:34:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:46,331 INFO L93 Difference]: Finished difference Result 810 states and 1058 transitions. [2021-11-13 01:34:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:46,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-13 01:34:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:46,337 INFO L225 Difference]: With dead ends: 810 [2021-11-13 01:34:46,337 INFO L226 Difference]: Without dead ends: 478 [2021-11-13 01:34:46,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:34:46,339 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 22 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.52ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.47ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:46,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1448 Invalid, 174 Unknown, 0 Unchecked, 6.52ms Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 223.47ms Time] [2021-11-13 01:34:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-13 01:34:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 472. [2021-11-13 01:34:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 450 states have (on average 1.24) internal successors, (558), 457 states have internal predecessors, (558), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-13 01:34:46,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 596 transitions. [2021-11-13 01:34:46,369 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 596 transitions. Word has length 255 [2021-11-13 01:34:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:46,371 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 596 transitions. [2021-11-13 01:34:46,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:34:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 596 transitions. [2021-11-13 01:34:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 01:34:46,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:46,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:46,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:46,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:46,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:46,786 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash -301049792, now seen corresponding path program 1 times [2021-11-13 01:34:46,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:46,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684503785] [2021-11-13 01:34:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:46,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:46,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:46,790 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:46,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:34:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:47,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:34:47,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:34:48,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:48,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684503785] [2021-11-13 01:34:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684503785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:48,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1425429724] [2021-11-13 01:34:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:48,418 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:48,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:48,427 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:48,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 01:34:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:34:49,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:34:50,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1425429724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:50,401 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:50,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 01:34:50,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729512802] [2021-11-13 01:34:50,402 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:50,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:50,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:50,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:50,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:34:50,403 INFO L87 Difference]: Start difference. First operand 472 states and 596 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:34:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:51,214 INFO L93 Difference]: Finished difference Result 1026 states and 1310 transitions. [2021-11-13 01:34:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:51,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-13 01:34:51,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:51,220 INFO L225 Difference]: With dead ends: 1026 [2021-11-13 01:34:51,221 INFO L226 Difference]: Without dead ends: 748 [2021-11-13 01:34:51,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:34:51,222 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 233 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 744.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.28ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 781.02ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:51,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 765 Invalid, 19 Unknown, 0 Unchecked, 4.28ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 781.02ms Time] [2021-11-13 01:34:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-13 01:34:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2021-11-13 01:34:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 714 states have (on average 1.2478991596638656) internal successors, (891), 726 states have internal predecessors, (891), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-13 01:34:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 952 transitions. [2021-11-13 01:34:51,274 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 952 transitions. Word has length 255 [2021-11-13 01:34:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:51,276 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 952 transitions. [2021-11-13 01:34:51,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:34:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 952 transitions. [2021-11-13 01:34:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-13 01:34:51,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:51,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:51,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:51,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-13 01:34:51,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:51,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash -627607892, now seen corresponding path program 1 times [2021-11-13 01:34:51,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:51,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768511373] [2021-11-13 01:34:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:51,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:51,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:51,709 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:51,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:34:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:52,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:34:52,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:34:53,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:53,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768511373] [2021-11-13 01:34:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768511373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:53,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1495206136] [2021-11-13 01:34:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:53,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:53,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:53,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 01:34:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:53,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:53,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-13 01:34:55,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-13 01:34:57,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1495206136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:57,212 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:57,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 01:34:57,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914092879] [2021-11-13 01:34:57,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:57,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:57,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:34:57,215 INFO L87 Difference]: Start difference. First operand 746 states and 952 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:34:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:57,854 INFO L93 Difference]: Finished difference Result 1054 states and 1345 transitions. [2021-11-13 01:34:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:57,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2021-11-13 01:34:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:57,859 INFO L225 Difference]: With dead ends: 1054 [2021-11-13 01:34:57,859 INFO L226 Difference]: Without dead ends: 745 [2021-11-13 01:34:57,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:34:57,862 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 93 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 587.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 611.86ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:57,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 713 Invalid, 16 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 611.86ms Time] [2021-11-13 01:34:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-11-13 01:34:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2021-11-13 01:34:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 712 states have (on average 1.2485955056179776) internal successors, (889), 724 states have internal predecessors, (889), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 01:34:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 947 transitions. [2021-11-13 01:34:57,894 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 947 transitions. Word has length 262 [2021-11-13 01:34:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:57,895 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 947 transitions. [2021-11-13 01:34:57,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:34:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 947 transitions. [2021-11-13 01:34:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 01:34:57,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:57,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:57,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:58,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:58,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:58,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:58,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1990050795, now seen corresponding path program 1 times [2021-11-13 01:34:58,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:58,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864916885] [2021-11-13 01:34:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:58,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:58,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:58,325 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:58,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:34:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:59,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:34:59,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:35:00,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:00,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864916885] [2021-11-13 01:35:00,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864916885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:00,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1979003116] [2021-11-13 01:35:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:00,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:00,235 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:00,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 01:35:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:35:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 01:35:01,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 01:35:01,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1979003116] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:01,769 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:35:01,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-13 01:35:01,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134965286] [2021-11-13 01:35:01,769 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:01,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:01,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:01,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:35:01,771 INFO L87 Difference]: Start difference. First operand 743 states and 947 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 01:35:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:01,954 INFO L93 Difference]: Finished difference Result 961 states and 1255 transitions. [2021-11-13 01:35:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:35:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-13 01:35:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:01,962 INFO L225 Difference]: With dead ends: 961 [2021-11-13 01:35:01,962 INFO L226 Difference]: Without dead ends: 806 [2021-11-13 01:35:01,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:35:01,966 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 34 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.30ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:01,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 593 Invalid, 133 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [85 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 158.30ms Time] [2021-11-13 01:35:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-13 01:35:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 803. [2021-11-13 01:35:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 772 states have (on average 1.2292746113989637) internal successors, (949), 784 states have internal predecessors, (949), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 01:35:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1007 transitions. [2021-11-13 01:35:02,006 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1007 transitions. Word has length 279 [2021-11-13 01:35:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:02,007 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1007 transitions. [2021-11-13 01:35:02,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 01:35:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1007 transitions. [2021-11-13 01:35:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 01:35:02,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:02,013 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:02,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:02,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:02,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:02,434 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:02,435 INFO L85 PathProgramCache]: Analyzing trace with hash 603847401, now seen corresponding path program 1 times [2021-11-13 01:35:02,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:02,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017360487] [2021-11-13 01:35:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:02,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:02,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:02,437 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:02,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:35:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:35:03,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:35:04,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:04,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017360487] [2021-11-13 01:35:04,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017360487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:04,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [138937055] [2021-11-13 01:35:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:04,116 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:04,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:04,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:04,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 01:35:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:35:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 01:35:05,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 01:35:05,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [138937055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:05,649 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:35:05,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-13 01:35:05,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294281433] [2021-11-13 01:35:05,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:05,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:05,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:05,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:35:05,652 INFO L87 Difference]: Start difference. First operand 803 states and 1007 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 01:35:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:05,830 INFO L93 Difference]: Finished difference Result 1466 states and 1855 transitions. [2021-11-13 01:35:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:35:05,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-13 01:35:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:05,836 INFO L225 Difference]: With dead ends: 1466 [2021-11-13 01:35:05,836 INFO L226 Difference]: Without dead ends: 755 [2021-11-13 01:35:05,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:35:05,838 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 291 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.31ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.68ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:05,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1403 Invalid, 103 Unknown, 0 Unchecked, 4.31ms Time], IncrementalHoareTripleChecker [39 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 146.68ms Time] [2021-11-13 01:35:05,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-13 01:35:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 752. [2021-11-13 01:35:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 721 states have (on average 1.1997226074895977) internal successors, (865), 733 states have internal predecessors, (865), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 01:35:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 923 transitions. [2021-11-13 01:35:05,868 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 923 transitions. Word has length 279 [2021-11-13 01:35:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:05,869 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 923 transitions. [2021-11-13 01:35:05,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 01:35:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 923 transitions. [2021-11-13 01:35:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 01:35:05,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:05,873 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:05,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:06,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:06,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:06,277 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:06,278 INFO L85 PathProgramCache]: Analyzing trace with hash 874348137, now seen corresponding path program 1 times [2021-11-13 01:35:06,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:06,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111187493] [2021-11-13 01:35:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:06,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:06,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:06,280 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:06,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:35:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:35:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:35:07,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:07,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111187493] [2021-11-13 01:35:07,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111187493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:07,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [701576036] [2021-11-13 01:35:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:07,896 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:07,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:07,897 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:07,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-13 01:35:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:08,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:08,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 01:35:08,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 01:35:09,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [701576036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:09,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:35:09,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-13 01:35:09,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985265911] [2021-11-13 01:35:09,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:09,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:35:09,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:35:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:35:09,142 INFO L87 Difference]: Start difference. First operand 752 states and 923 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 01:35:09,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:09,281 INFO L93 Difference]: Finished difference Result 931 states and 1165 transitions. [2021-11-13 01:35:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:35:09,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-13 01:35:09,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:09,288 INFO L225 Difference]: With dead ends: 931 [2021-11-13 01:35:09,289 INFO L226 Difference]: Without dead ends: 708 [2021-11-13 01:35:09,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:35:09,290 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 80 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.69ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:09,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1010 Invalid, 66 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [27 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 101.69ms Time] [2021-11-13 01:35:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-13 01:35:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 701. [2021-11-13 01:35:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 670 states have (on average 1.1656716417910449) internal successors, (781), 682 states have internal predecessors, (781), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 01:35:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 839 transitions. [2021-11-13 01:35:09,324 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 839 transitions. Word has length 279 [2021-11-13 01:35:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:09,325 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 839 transitions. [2021-11-13 01:35:09,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 01:35:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 839 transitions. [2021-11-13 01:35:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 01:35:09,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:09,328 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:09,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:09,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:09,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:09,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1511815561, now seen corresponding path program 1 times [2021-11-13 01:35:09,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:09,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236449107] [2021-11-13 01:35:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:09,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:09,753 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:09,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:35:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:10,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:35:10,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:35:11,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236449107] [2021-11-13 01:35:11,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236449107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1379213242] [2021-11-13 01:35:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:11,365 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:11,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:11,365 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:11,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 01:35:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:12,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:35:12,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:35:13,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1379213242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:13,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020840113] [2021-11-13 01:35:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:13,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:35:13,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:35:13,186 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:35:13,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 01:35:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:13,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 01:35:14,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 01:35:15,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020840113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:15,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:35:15,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-13 01:35:15,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799336389] [2021-11-13 01:35:15,304 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:35:15,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:35:15,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:35:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:35:15,309 INFO L87 Difference]: Start difference. First operand 701 states and 839 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 01:35:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:18,193 INFO L93 Difference]: Finished difference Result 2955 states and 3656 transitions. [2021-11-13 01:35:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:35:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-13 01:35:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:18,206 INFO L225 Difference]: With dead ends: 2955 [2021-11-13 01:35:18,206 INFO L226 Difference]: Without dead ends: 2301 [2021-11-13 01:35:18,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:35:18,209 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 2383 mSDsluCounter, 5358 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2362.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 6169 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.66ms SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2640.02ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:18,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 6169 Invalid, 776 Unknown, 0 Unchecked, 13.66ms Time], IncrementalHoareTripleChecker [227 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 2640.02ms Time] [2021-11-13 01:35:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-13 01:35:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1947. [2021-11-13 01:35:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1878 states have (on average 1.174653887113951) internal successors, (2206), 1890 states have internal predecessors, (2206), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-13 01:35:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2353 transitions. [2021-11-13 01:35:18,286 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2353 transitions. Word has length 279 [2021-11-13 01:35:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:18,287 INFO L470 AbstractCegarLoop]: Abstraction has 1947 states and 2353 transitions. [2021-11-13 01:35:18,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 01:35:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2353 transitions. [2021-11-13 01:35:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-13 01:35:18,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:18,297 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:18,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:18,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:18,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:18,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:18,915 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash -889533929, now seen corresponding path program 2 times [2021-11-13 01:35:18,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:18,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738576019] [2021-11-13 01:35:18,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:35:18,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:18,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:18,920 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:18,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:35:20,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:35:20,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:35:20,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:35:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 01:35:21,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 01:35:23,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:23,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738576019] [2021-11-13 01:35:23,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738576019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:23,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1470275659] [2021-11-13 01:35:23,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:35:23,188 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:23,189 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:23,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 01:35:26,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:35:26,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:35:26,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:35:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 01:35:27,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 01:35:28,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1470275659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:28,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33021122] [2021-11-13 01:35:28,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:35:28,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:35:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:35:28,835 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:35:28,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 01:35:29,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:35:29,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:35:30,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:35:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-13 01:35:31,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-13 01:35:32,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33021122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:32,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:35:32,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-13 01:35:32,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760223607] [2021-11-13 01:35:32,554 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:35:32,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 01:35:32,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 01:35:32,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:35:32,557 INFO L87 Difference]: Start difference. First operand 1947 states and 2353 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:35:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:33,861 INFO L93 Difference]: Finished difference Result 3873 states and 4886 transitions. [2021-11-13 01:35:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 01:35:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-13 01:35:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:33,874 INFO L225 Difference]: With dead ends: 3873 [2021-11-13 01:35:33,874 INFO L226 Difference]: Without dead ends: 1967 [2021-11-13 01:35:33,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 01:35:33,881 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 173 mSDsluCounter, 2341 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 418.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.36ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 481.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:33,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2642 Invalid, 379 Unknown, 0 Unchecked, 4.36ms Time], IncrementalHoareTripleChecker [87 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 481.88ms Time] [2021-11-13 01:35:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-11-13 01:35:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1959. [2021-11-13 01:35:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1890 states have (on average 1.1756613756613756) internal successors, (2222), 1902 states have internal predecessors, (2222), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-13 01:35:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2369 transitions. [2021-11-13 01:35:33,970 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2369 transitions. Word has length 679 [2021-11-13 01:35:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:33,970 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 2369 transitions. [2021-11-13 01:35:33,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:35:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2369 transitions. [2021-11-13 01:35:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-13 01:35:33,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:33,981 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:33,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:34,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:34,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:34,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:34,594 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1901317097, now seen corresponding path program 3 times [2021-11-13 01:35:34,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:34,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927432544] [2021-11-13 01:35:34,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:35:34,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:34,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:34,599 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:34,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa762a4-9c92-4b48-ba5a-2c712be4f419/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process