./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.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_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/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_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/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_beb8fb82-f828-4fa7-828d-710df2f42ae8/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 72a3b80a468e10df778a3b8ff41e4c2b1e0b82c1005f056b209a19315511b1a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:51:33,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:51:33,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:51:33,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:51:33,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:51:33,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:51:33,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:51:33,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:51:33,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:51:33,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:51:33,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:51:33,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:51:33,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:51:33,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:51:33,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:51:33,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:51:33,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:51:33,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:51:33,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:51:33,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:51:33,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:51:33,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:51:33,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:51:33,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:51:33,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:51:33,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:51:33,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:51:33,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:51:33,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:51:33,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:51:33,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:51:33,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:51:33,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:51:33,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:51:33,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:51:33,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:51:33,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:51:33,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:51:33,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:51:33,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:51:33,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:51:33,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:51:33,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:51:33,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:51:33,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:51:33,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:51:33,879 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:51:33,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:51:33,880 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:51:33,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:51:33,886 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:51:33,887 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:51:33,888 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:51:33,888 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:51:33,888 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:51:33,888 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:51:33,889 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:51:33,889 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:51:33,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:51:33,890 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:51:33,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:51:33,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:51:33,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:51:33,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:51:33,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:51:33,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:51:33,892 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:51:33,892 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:51:33,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:51:33,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:51:33,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:51:33,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:51:33,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:51:33,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:33,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:51:33,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:51:33,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:51:33,896 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:51:33,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:51:33,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:51:33,897 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:51:33,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:51:33,897 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72a3b80a468e10df778a3b8ff41e4c2b1e0b82c1005f056b209a19315511b1a5 [2021-11-12 23:51:34,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:51:34,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:51:34,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:51:34,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:51:34,250 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:51:34,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i [2021-11-12 23:51:34,310 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data/f64a09095/c3bfa30738fd40af991b21dee527ac9b/FLAGd3ef520c9 [2021-11-12 23:51:34,926 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:51:34,927 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i [2021-11-12 23:51:34,950 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data/f64a09095/c3bfa30738fd40af991b21dee527ac9b/FLAGd3ef520c9 [2021-11-12 23:51:35,125 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data/f64a09095/c3bfa30738fd40af991b21dee527ac9b [2021-11-12 23:51:35,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:51:35,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:51:35,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:35,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:51:35,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:51:35,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:35,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e235b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35, skipping insertion in model container [2021-11-12 23:51:35,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:35,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:51:35,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:35,650 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i[33021,33034] [2021-11-12 23:51:35,832 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i[44590,44603] [2021-11-12 23:51:35,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:35,869 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) [2021-11-12 23:51:35,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a58899e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35, skipping insertion in model container [2021-11-12 23:51:35,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:35,870 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:51:35,872 INFO L158 Benchmark]: Toolchain (without parser) took 741.94ms. Allocated memory is still 98.6MB. Free memory was 74.2MB in the beginning and 62.8MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:51:35,873 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 77.6MB. Free memory was 55.2MB in the beginning and 55.2MB in the end (delta: 35.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:51:35,879 INFO L158 Benchmark]: CACSL2BoogieTranslator took 739.49ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 62.8MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:51:35,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 77.6MB. Free memory was 55.2MB in the beginning and 55.2MB in the end (delta: 35.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 739.49ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 62.8MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/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_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/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_beb8fb82-f828-4fa7-828d-710df2f42ae8/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 72a3b80a468e10df778a3b8ff41e4c2b1e0b82c1005f056b209a19315511b1a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:51:38,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:51:38,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:51:38,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:51:38,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:51:38,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:51:38,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:51:38,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:51:38,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:51:38,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:51:38,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:51:38,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:51:38,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:51:38,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:51:38,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:51:38,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:51:38,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:51:38,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:51:38,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:51:38,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:51:38,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:51:38,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:51:38,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:51:38,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:51:38,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:51:38,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:51:38,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:51:38,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:51:38,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:51:38,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:51:38,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:51:38,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:51:38,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:51:38,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:51:38,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:51:38,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:51:38,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:51:38,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:51:38,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:51:38,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:51:38,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:51:38,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:51:38,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:51:38,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:51:38,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:51:38,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:51:38,269 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:51:38,269 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:51:38,269 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:51:38,270 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:51:38,270 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:51:38,270 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:51:38,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:51:38,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:51:38,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:51:38,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:51:38,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:51:38,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:51:38,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:51:38,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:51:38,274 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:51:38,275 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:51:38,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:51:38,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:51:38,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:51:38,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:51:38,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:51:38,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:51:38,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:51:38,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:38,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:51:38,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:51:38,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:51:38,278 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:51:38,278 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:51:38,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:51:38,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:51:38,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:51:38,279 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72a3b80a468e10df778a3b8ff41e4c2b1e0b82c1005f056b209a19315511b1a5 [2021-11-12 23:51:38,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:51:38,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:51:38,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:51:38,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:51:38,686 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:51:38,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i [2021-11-12 23:51:38,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data/fdd3e2756/6ec3f38495ca44728f739d10f42ac910/FLAG04f0ff813 [2021-11-12 23:51:39,516 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:51:39,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i [2021-11-12 23:51:39,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data/fdd3e2756/6ec3f38495ca44728f739d10f42ac910/FLAG04f0ff813 [2021-11-12 23:51:39,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/data/fdd3e2756/6ec3f38495ca44728f739d10f42ac910 [2021-11-12 23:51:39,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:51:39,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:51:39,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:39,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:51:39,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:51:39,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:39" (1/1) ... [2021-11-12 23:51:39,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcb8f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:39, skipping insertion in model container [2021-11-12 23:51:39,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:39" (1/1) ... [2021-11-12 23:51:39,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:51:39,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:40,364 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i[33021,33034] [2021-11-12 23:51:40,512 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i[44590,44603] [2021-11-12 23:51:40,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:40,558 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:51:40,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:40,593 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i[33021,33034] [2021-11-12 23:51:40,722 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i[44590,44603] [2021-11-12 23:51:40,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:40,757 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:51:40,785 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i[33021,33034] [2021-11-12 23:51:40,878 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_beb8fb82-f828-4fa7-828d-710df2f42ae8/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-2.i[44590,44603] [2021-11-12 23:51:40,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:40,937 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:51:40,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40 WrapperNode [2021-11-12 23:51:40,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:40,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:40,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:51:40,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:51:40,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:41,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:51:41,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:51:41,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:51:41,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:51:41,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:51:41,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:51:41,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:51:41,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (1/1) ... [2021-11-12 23:51:41,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:51:41,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:51:41,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:51:41,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:51:41,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:51:41,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:51:41,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:51:41,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:51:41,329 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:51:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:51:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:51:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:51:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:51:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:51:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:51:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:51:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:51:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:51:41,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:51:48,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:51:48,325 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-12 23:51:48,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:48 BoogieIcfgContainer [2021-11-12 23:51:48,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:51:48,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:51:48,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:51:48,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:51:48,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:51:39" (1/3) ... [2021-11-12 23:51:48,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4271940f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:48, skipping insertion in model container [2021-11-12 23:51:48,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:40" (2/3) ... [2021-11-12 23:51:48,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4271940f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:48, skipping insertion in model container [2021-11-12 23:51:48,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:48" (3/3) ... [2021-11-12 23:51:48,341 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test3-2.i [2021-11-12 23:51:48,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:51:48,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:51:48,440 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:51:48,450 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 [2021-11-12 23:51:48,451 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:51:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 218 states have (on average 1.6926605504587156) internal successors, (369), 225 states have internal predecessors, (369), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:51:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:51:48,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:48,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:48,493 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:48,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash -858857507, now seen corresponding path program 1 times [2021-11-12 23:51:48,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:48,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096695192] [2021-11-12 23:51:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:48,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:48,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:48,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:48,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:51:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:51:48,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:48,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:48,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:48,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096695192] [2021-11-12 23:51:48,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096695192] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:48,844 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:48,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:51:48,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376095801] [2021-11-12 23:51:48,847 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:48,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:51:48,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:51:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:51:48,889 INFO L87 Difference]: Start difference. First operand has 231 states, 218 states have (on average 1.6926605504587156) internal successors, (369), 225 states have internal predecessors, (369), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:48,948 INFO L93 Difference]: Finished difference Result 460 states and 773 transitions. [2021-11-12 23:51:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:51:48,950 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-12 23:51:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:48,962 INFO L225 Difference]: With dead ends: 460 [2021-11-12 23:51:48,962 INFO L226 Difference]: Without dead ends: 198 [2021-11-12 23:51:48,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:51:48,971 INFO L933 BasicCegarLoop]: 307 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, 307 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.79ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:48,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 3.79ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:51:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-12 23:51:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-12 23:51:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.3279569892473118) internal successors, (247), 192 states have internal predecessors, (247), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:51:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2021-11-12 23:51:49,034 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 9 [2021-11-12 23:51:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:49,035 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2021-11-12 23:51:49,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2021-11-12 23:51:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:51:49,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:49,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:49,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:49,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:49,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1459926514, now seen corresponding path program 1 times [2021-11-12 23:51:49,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:49,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982724494] [2021-11-12 23:51:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:49,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:49,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:49,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:49,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:51:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:49,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:51:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:49,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:49,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:49,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982724494] [2021-11-12 23:51:49,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982724494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:49,860 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:49,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:51:49,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350393803] [2021-11-12 23:51:49,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:49,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:51:49,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:51:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:51:49,864 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:52,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:54,268 INFO L93 Difference]: Finished difference Result 502 states and 668 transitions. [2021-11-12 23:51:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:51:54,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-12 23:51:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:54,273 INFO L225 Difference]: With dead ends: 502 [2021-11-12 23:51:54,273 INFO L226 Difference]: Without dead ends: 304 [2021-11-12 23:51:54,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:51:54,276 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 140 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4182.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.47ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4322.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:54,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 703 Invalid, 80 Unknown, 0 Unchecked, 8.47ms Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 1 Unknown, 0 Unchecked, 4322.42ms Time] [2021-11-12 23:51:54,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-12 23:51:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2021-11-12 23:51:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 289 states have (on average 1.328719723183391) internal successors, (384), 295 states have internal predecessors, (384), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:51:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 400 transitions. [2021-11-12 23:51:54,305 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 400 transitions. Word has length 14 [2021-11-12 23:51:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:54,305 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 400 transitions. [2021-11-12 23:51:54,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 400 transitions. [2021-11-12 23:51:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:51:54,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:54,308 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, 1, 1] [2021-11-12 23:51:54,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:54,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:54,525 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:54,526 INFO L85 PathProgramCache]: Analyzing trace with hash -294024543, now seen corresponding path program 1 times [2021-11-12 23:51:54,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:54,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587847524] [2021-11-12 23:51:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:54,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:54,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:54,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:54,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:51:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:54,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:55,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:55,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587847524] [2021-11-12 23:51:55,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587847524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:55,069 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:55,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 23:51:55,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256818372] [2021-11-12 23:51:55,070 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:55,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:51:55,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:51:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:51:55,073 INFO L87 Difference]: Start difference. First operand 301 states and 400 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:55,294 INFO L93 Difference]: Finished difference Result 499 states and 673 transitions. [2021-11-12 23:51:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:51:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 23:51:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:55,297 INFO L225 Difference]: With dead ends: 499 [2021-11-12 23:51:55,297 INFO L226 Difference]: Without dead ends: 334 [2021-11-12 23:51:55,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:51:55,300 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 104 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.11ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:55,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1241 Invalid, 98 Unknown, 0 Unchecked, 6.11ms Time], IncrementalHoareTripleChecker [25 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 191.85ms Time] [2021-11-12 23:51:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-12 23:51:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 307. [2021-11-12 23:51:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 295 states have (on average 1.2677966101694915) internal successors, (374), 301 states have internal predecessors, (374), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:51:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 390 transitions. [2021-11-12 23:51:55,328 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 390 transitions. Word has length 44 [2021-11-12 23:51:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:55,328 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 390 transitions. [2021-11-12 23:51:55,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 390 transitions. [2021-11-12 23:51:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:51:55,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:55,331 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, 1, 1] [2021-11-12 23:51:55,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:55,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:55,548 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1193467565, now seen corresponding path program 1 times [2021-11-12 23:51:55,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:55,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399249992] [2021-11-12 23:51:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:55,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:55,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:55,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:55,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:51:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:51:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:55,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:56,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:56,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399249992] [2021-11-12 23:51:56,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399249992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:56,303 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:56,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 23:51:56,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077684689] [2021-11-12 23:51:56,303 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:56,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:51:56,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:51:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:51:56,305 INFO L87 Difference]: Start difference. First operand 307 states and 390 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-12 23:51:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:56,483 INFO L93 Difference]: Finished difference Result 491 states and 627 transitions. [2021-11-12 23:51:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:51:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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 44 [2021-11-12 23:51:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:56,487 INFO L225 Difference]: With dead ends: 491 [2021-11-12 23:51:56,487 INFO L226 Difference]: Without dead ends: 320 [2021-11-12 23:51:56,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:51:56,489 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 186 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.86ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:56,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1084 Invalid, 99 Unknown, 0 Unchecked, 4.86ms Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 152.14ms Time] [2021-11-12 23:51:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-12 23:51:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 295. [2021-11-12 23:51:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 283 states have (on average 1.2508833922261484) internal successors, (354), 289 states have internal predecessors, (354), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:51:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2021-11-12 23:51:56,508 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 44 [2021-11-12 23:51:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:56,508 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2021-11-12 23:51:56,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-12 23:51:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2021-11-12 23:51:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:51:56,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:56,511 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, 1, 1] [2021-11-12 23:51:56,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:56,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:56,723 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -440515753, now seen corresponding path program 1 times [2021-11-12 23:51:56,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:56,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859592557] [2021-11-12 23:51:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:56,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:56,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:56,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:51:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:51:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:57,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:51:57,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:51:57,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:51:57,099 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 23:51:57,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-12 23:51:57,184 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 23:51:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-12 23:51:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:57,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:57,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:57,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859592557] [2021-11-12 23:51:57,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859592557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:57,445 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:57,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:51:57,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477742547] [2021-11-12 23:51:57,446 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:57,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:51:57,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:57,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:51:57,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:51:57,447 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2021-11-12 23:52:02,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:04,362 INFO L93 Difference]: Finished difference Result 606 states and 748 transitions. [2021-11-12 23:52:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:04,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 44 [2021-11-12 23:52:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:04,366 INFO L225 Difference]: With dead ends: 606 [2021-11-12 23:52:04,366 INFO L226 Difference]: Without dead ends: 446 [2021-11-12 23:52:04,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:04,368 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 342 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6641.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.54ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6846.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:04,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 681 Invalid, 166 Unknown, 0 Unchecked, 5.54ms Time], IncrementalHoareTripleChecker [12 Valid, 153 Invalid, 1 Unknown, 0 Unchecked, 6846.04ms Time] [2021-11-12 23:52:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-12 23:52:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 294. [2021-11-12 23:52:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 282 states have (on average 1.24822695035461) internal successors, (352), 288 states have internal predecessors, (352), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:52:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 368 transitions. [2021-11-12 23:52:04,385 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 368 transitions. Word has length 44 [2021-11-12 23:52:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:04,385 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 368 transitions. [2021-11-12 23:52:04,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2021-11-12 23:52:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 368 transitions. [2021-11-12 23:52:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 23:52:04,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:04,390 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:52:04,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:04,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:04,604 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1794176704, now seen corresponding path program 1 times [2021-11-12 23:52:04,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:04,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955244681] [2021-11-12 23:52:04,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:04,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:04,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:04,613 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:04,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:52:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:04,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:52:05,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:52:05,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:05,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955244681] [2021-11-12 23:52:05,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955244681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:05,391 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:05,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:52:05,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58946058] [2021-11-12 23:52:05,391 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:05,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:52:05,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:52:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:52:05,393 INFO L87 Difference]: Start difference. First operand 294 states and 368 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:52:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:05,539 INFO L93 Difference]: Finished difference Result 587 states and 741 transitions. [2021-11-12 23:52:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:52:05,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 81 [2021-11-12 23:52:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:05,542 INFO L225 Difference]: With dead ends: 587 [2021-11-12 23:52:05,542 INFO L226 Difference]: Without dead ends: 302 [2021-11-12 23:52:05,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:52:05,543 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 208 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:05,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 489 Invalid, 69 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 117.91ms Time] [2021-11-12 23:52:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-12 23:52:05,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2021-11-12 23:52:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 288 states have (on average 1.1875) internal successors, (342), 294 states have internal predecessors, (342), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:52:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 358 transitions. [2021-11-12 23:52:05,559 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 358 transitions. Word has length 81 [2021-11-12 23:52:05,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:05,559 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 358 transitions. [2021-11-12 23:52:05,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:52:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 358 transitions. [2021-11-12 23:52:05,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 23:52:05,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:05,563 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:52:05,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:05,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:05,777 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash 917413940, now seen corresponding path program 1 times [2021-11-12 23:52:05,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:05,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856186392] [2021-11-12 23:52:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:05,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:05,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:05,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:05,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:52:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:06,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:06,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:06,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:06,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:06,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856186392] [2021-11-12 23:52:06,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856186392] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:52:06,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:52:06,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:52:06,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090312661] [2021-11-12 23:52:06,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:06,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:52:06,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:52:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:52:06,462 INFO L87 Difference]: Start difference. First operand 300 states and 358 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:52:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:06,515 INFO L93 Difference]: Finished difference Result 558 states and 673 transitions. [2021-11-12 23:52:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:52:06,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2021-11-12 23:52:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:06,518 INFO L225 Difference]: With dead ends: 558 [2021-11-12 23:52:06,519 INFO L226 Difference]: Without dead ends: 303 [2021-11-12 23:52:06,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:06,520 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 2 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:06,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 698 Invalid, 13 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 31.37ms Time] [2021-11-12 23:52:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-12 23:52:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-11-12 23:52:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 290 states have (on average 1.1896551724137931) internal successors, (345), 297 states have internal predecessors, (345), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:52:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 362 transitions. [2021-11-12 23:52:06,537 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 362 transitions. Word has length 81 [2021-11-12 23:52:06,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:06,537 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 362 transitions. [2021-11-12 23:52:06,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:52:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 362 transitions. [2021-11-12 23:52:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:52:06,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:06,539 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:52:06,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:06,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:06,752 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1589864622, now seen corresponding path program 1 times [2021-11-12 23:52:06,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:06,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135971047] [2021-11-12 23:52:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:06,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:06,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:06,754 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:06,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:52:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:07,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:07,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:07,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135971047] [2021-11-12 23:52:07,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135971047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:07,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1946049009] [2021-11-12 23:52:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:07,545 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:07,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:07,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:07,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:52:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:07,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:08,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:08,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1946049009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:08,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983807025] [2021-11-12 23:52:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:08,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:52:08,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:52:08,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:52:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:08,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:08,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:08,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:52:08,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:52:08,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:52:08,721 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 23:52:08,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-12 23:52:08,806 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 23:52:08,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-12 23:52:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:52:08,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:52:09,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983807025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:09,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:52:09,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-12 23:52:09,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682793539] [2021-11-12 23:52:09,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:09,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:52:09,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:52:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:52:09,032 INFO L87 Difference]: Start difference. First operand 303 states and 362 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:52:10,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:13,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:16,566 INFO L93 Difference]: Finished difference Result 461 states and 552 transitions. [2021-11-12 23:52:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:52:16,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2021-11-12 23:52:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:16,572 INFO L225 Difference]: With dead ends: 461 [2021-11-12 23:52:16,572 INFO L226 Difference]: Without dead ends: 440 [2021-11-12 23:52:16,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:52:16,574 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 287 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7185.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.47ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7416.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:16,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 668 Invalid, 133 Unknown, 0 Unchecked, 4.47ms Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 1 Unknown, 0 Unchecked, 7416.67ms Time] [2021-11-12 23:52:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-12 23:52:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 305. [2021-11-12 23:52:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 292 states have (on average 1.1883561643835616) internal successors, (347), 299 states have internal predecessors, (347), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:52:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 364 transitions. [2021-11-12 23:52:16,592 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 364 transitions. Word has length 83 [2021-11-12 23:52:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:16,593 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 364 transitions. [2021-11-12 23:52:16,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:52:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 364 transitions. [2021-11-12 23:52:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:52:16,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:16,596 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:16,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:16,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:17,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-12 23:52:17,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:17,218 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1213202843, now seen corresponding path program 1 times [2021-11-12 23:52:17,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:17,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849462692] [2021-11-12 23:52:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:17,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:17,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:17,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:52:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:17,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:17,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:18,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:18,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849462692] [2021-11-12 23:52:18,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849462692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:18,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62129259] [2021-11-12 23:52:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:18,196 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:18,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:18,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:18,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:52:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:18,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:52:18,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:52:19,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62129259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:19,457 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:52:19,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-12 23:52:19,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064316674] [2021-11-12 23:52:19,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:19,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:52:19,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:19,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:52:19,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:19,459 INFO L87 Difference]: Start difference. First operand 305 states and 364 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-11-12 23:52:22,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:24,312 INFO L93 Difference]: Finished difference Result 672 states and 822 transitions. [2021-11-12 23:52:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 113 [2021-11-12 23:52:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:24,317 INFO L225 Difference]: With dead ends: 672 [2021-11-12 23:52:24,317 INFO L226 Difference]: Without dead ends: 412 [2021-11-12 23:52:24,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:52:24,318 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 415 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4628.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4802.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:24,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 449 Invalid, 98 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 1 Unknown, 0 Unchecked, 4802.89ms Time] [2021-11-12 23:52:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-12 23:52:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 380. [2021-11-12 23:52:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 367 states have (on average 1.1907356948228882) internal successors, (437), 374 states have internal predecessors, (437), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:52:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 454 transitions. [2021-11-12 23:52:24,342 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 454 transitions. Word has length 113 [2021-11-12 23:52:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:24,343 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 454 transitions. [2021-11-12 23:52:24,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-11-12 23:52:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 454 transitions. [2021-11-12 23:52:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:52:24,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:24,345 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:24,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-12 23:52:24,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:24,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:24,748 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash -586883627, now seen corresponding path program 1 times [2021-11-12 23:52:24,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:24,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40140216] [2021-11-12 23:52:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:24,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:24,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:24,751 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:24,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:52:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:25,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:25,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:25,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:25,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40140216] [2021-11-12 23:52:25,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40140216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:25,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [203831811] [2021-11-12 23:52:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:25,710 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:25,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:25,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:25,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:52:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:26,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:26,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:26,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [203831811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:26,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732915757] [2021-11-12 23:52:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:26,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:26,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:52:26,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:52:26,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:52:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:27,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:27,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732915757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:27,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:52:27,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-12 23:52:27,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545617087] [2021-11-12 23:52:27,821 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:52:27,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:52:27,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:52:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:52:27,823 INFO L87 Difference]: Start difference. First operand 380 states and 454 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:52:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:28,374 INFO L93 Difference]: Finished difference Result 727 states and 881 transitions. [2021-11-12 23:52:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:52:28,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 120 [2021-11-12 23:52:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:28,379 INFO L225 Difference]: With dead ends: 727 [2021-11-12 23:52:28,379 INFO L226 Difference]: Without dead ends: 395 [2021-11-12 23:52:28,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:52:28,382 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 46 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.39ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:28,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1382 Invalid, 100 Unknown, 0 Unchecked, 6.39ms Time], IncrementalHoareTripleChecker [29 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 218.82ms Time] [2021-11-12 23:52:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-12 23:52:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2021-11-12 23:52:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 377 states have (on average 1.206896551724138) internal successors, (455), 384 states have internal predecessors, (455), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:52:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 472 transitions. [2021-11-12 23:52:28,417 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 472 transitions. Word has length 120 [2021-11-12 23:52:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:28,417 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 472 transitions. [2021-11-12 23:52:28,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:52:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 472 transitions. [2021-11-12 23:52:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:52:28,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:28,423 INFO L514 BasicCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:28,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:28,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:28,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:29,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:29,029 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1021822029, now seen corresponding path program 2 times [2021-11-12 23:52:29,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:29,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912435844] [2021-11-12 23:52:29,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:52:29,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:29,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:29,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:29,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:52:29,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:52:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:52:29,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:52:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:52:29,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:52:30,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:30,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912435844] [2021-11-12 23:52:30,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912435844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:30,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1780300024] [2021-11-12 23:52:30,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:52:30,289 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:30,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:30,290 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:30,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:52:31,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:52:31,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:52:31,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:52:31,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:52:31,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:52:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1780300024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:31,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809779351] [2021-11-12 23:52:31,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:52:31,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:31,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:52:31,832 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:52:31,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 23:52:32,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:52:32,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:52:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:32,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:52:32,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:52:33,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809779351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:33,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:52:33,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-12 23:52:33,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236035021] [2021-11-12 23:52:33,303 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:52:33,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:52:33,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:52:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:52:33,306 INFO L87 Difference]: Start difference. First operand 391 states and 472 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:52:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:34,670 INFO L93 Difference]: Finished difference Result 745 states and 906 transitions. [2021-11-12 23:52:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:52:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-11-12 23:52:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:34,674 INFO L225 Difference]: With dead ends: 745 [2021-11-12 23:52:34,675 INFO L226 Difference]: Without dead ends: 404 [2021-11-12 23:52:34,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 23:52:34,677 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 69 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 460.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 539.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:34,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1646 Invalid, 257 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [38 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 539.50ms Time] [2021-11-12 23:52:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-12 23:52:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 398. [2021-11-12 23:52:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 384 states have (on average 1.203125) internal successors, (462), 391 states have internal predecessors, (462), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:52:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 479 transitions. [2021-11-12 23:52:34,711 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 479 transitions. Word has length 126 [2021-11-12 23:52:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:34,711 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 479 transitions. [2021-11-12 23:52:34,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:52:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 479 transitions. [2021-11-12 23:52:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:52:34,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:34,714 INFO L514 BasicCegarLoop]: trace histogram [15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:34,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-12 23:52:34,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:35,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-12 23:52:35,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:35,337 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash -399861817, now seen corresponding path program 3 times [2021-11-12 23:52:35,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:35,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044929062] [2021-11-12 23:52:35,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:52:35,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:35,340 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:35,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:52:40,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:52:40,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:52:40,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:52:40,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:52:40,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:52:41,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:41,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044929062] [2021-11-12 23:52:41,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044929062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:41,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028607869] [2021-11-12 23:52:41,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:52:41,251 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:41,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:41,251 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:41,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:53:37,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:53:37,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:53:37,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:53:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:53:37,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:53:38,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2028607869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:38,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164210022] [2021-11-12 23:53:38,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:53:38,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:53:38,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:53:38,394 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:53:38,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb8fb82-f828-4fa7-828d-710df2f42ae8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process