./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8 --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 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:56:10,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:56:10,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:56:10,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:56:10,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:56:10,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:56:10,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:56:10,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:56:10,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:56:10,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:56:10,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:56:10,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:56:10,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:56:10,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:56:10,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:56:10,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:56:10,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:56:10,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:56:10,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:56:10,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:56:10,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:56:10,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:56:10,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:56:10,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:56:10,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:56:10,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:56:10,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:56:10,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:56:10,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:56:10,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:56:10,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:56:10,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:56:10,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:56:10,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:56:10,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:56:10,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:56:10,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:56:10,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:56:10,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:56:10,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:56:10,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:56:10,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:56:10,908 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:56:10,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:56:10,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:56:10,909 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:56:10,909 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:56:10,909 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:56:10,909 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:56:10,910 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:56:10,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:56:10,910 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:56:10,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:56:10,910 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:56:10,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:56:10,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:56:10,911 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:56:10,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:56:10,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:56:10,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:56:10,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:56:10,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:56:10,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:56:10,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:56:10,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:56:10,917 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:56:10,917 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:56:10,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:56:10,917 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:56:10,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:56:10,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:56:10,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:56:10,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:56:10,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:56:10,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:56:10,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:56:10,919 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:56:10,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:56:10,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:56:10,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:56:10,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:56:10,920 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_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2021-11-07 00:56:11,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:56:11,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:56:11,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:56:11,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:56:11,193 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:56:11,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-07 00:56:11,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data/4b80fcac2/a01b7c763aee4f5b8402b87c178db84e/FLAGc06c5cc4c [2021-11-07 00:56:11,872 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:56:11,873 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-07 00:56:11,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data/4b80fcac2/a01b7c763aee4f5b8402b87c178db84e/FLAGc06c5cc4c [2021-11-07 00:56:12,128 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data/4b80fcac2/a01b7c763aee4f5b8402b87c178db84e [2021-11-07 00:56:12,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:56:12,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:56:12,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:12,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:56:12,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:56:12,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:12" (1/1) ... [2021-11-07 00:56:12,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdbe9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:12, skipping insertion in model container [2021-11-07 00:56:12,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:12" (1/1) ... [2021-11-07 00:56:12,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:56:12,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:56:12,748 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_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-07 00:56:12,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:12,770 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) [2021-11-07 00:56:12,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4bcabc1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:12, skipping insertion in model container [2021-11-07 00:56:12,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:12,771 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:56:12,774 INFO L168 Benchmark]: Toolchain (without parser) took 640.46 ms. Allocated memory is still 136.3 MB. Free memory was 100.5 MB in the beginning and 100.4 MB in the end (delta: 107.8 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:12,774 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 83.9 MB. Free memory was 39.5 MB in the beginning and 39.4 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:56:12,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 638.16 ms. Allocated memory is still 136.3 MB. Free memory was 100.3 MB in the beginning and 100.4 MB in the end (delta: -156.4 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:56:12,777 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 83.9 MB. Free memory was 39.5 MB in the beginning and 39.4 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 638.16 ms. Allocated memory is still 136.3 MB. Free memory was 100.3 MB in the beginning and 100.4 MB in the end (delta: -156.4 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1375]: 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_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8 --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 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:56:14,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:56:14,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:56:15,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:56:15,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:56:15,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:56:15,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:56:15,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:56:15,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:56:15,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:56:15,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:56:15,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:56:15,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:56:15,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:56:15,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:56:15,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:56:15,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:56:15,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:56:15,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:56:15,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:56:15,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:56:15,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:56:15,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:56:15,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:56:15,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:56:15,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:56:15,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:56:15,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:56:15,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:56:15,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:56:15,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:56:15,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:56:15,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:56:15,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:56:15,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:56:15,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:56:15,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:56:15,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:56:15,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:56:15,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:56:15,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:56:15,089 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:56:15,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:56:15,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:56:15,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:56:15,144 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:56:15,145 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:56:15,145 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:56:15,145 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:56:15,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:56:15,146 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:56:15,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:56:15,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:56:15,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:56:15,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:56:15,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:56:15,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:56:15,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:56:15,149 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:56:15,149 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:56:15,150 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:56:15,150 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:56:15,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:56:15,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:56:15,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:56:15,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:56:15,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:56:15,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:56:15,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:56:15,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:56:15,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:56:15,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:56:15,153 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:56:15,153 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:15,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:56:15,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:56:15,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:56:15,154 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_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2021-11-07 00:56:15,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:56:15,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:56:15,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:56:15,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:56:15,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:56:15,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-07 00:56:15,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data/f8f96fcc1/9ef1500b03d54e17854974086e1974e5/FLAGdd3dbf9f6 [2021-11-07 00:56:16,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:56:16,290 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-07 00:56:16,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data/f8f96fcc1/9ef1500b03d54e17854974086e1974e5/FLAGdd3dbf9f6 [2021-11-07 00:56:16,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/data/f8f96fcc1/9ef1500b03d54e17854974086e1974e5 [2021-11-07 00:56:16,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:56:16,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:56:16,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:16,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:56:16,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:56:16,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:16" (1/1) ... [2021-11-07 00:56:16,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1001d2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:16, skipping insertion in model container [2021-11-07 00:56:16,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:16" (1/1) ... [2021-11-07 00:56:16,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:56:16,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:56:17,175 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_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-07 00:56:17,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:17,191 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:56:17,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:56:17,312 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_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-07 00:56:17,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:17,319 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:56:17,442 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_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-07 00:56:17,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:17,470 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:56:17,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17 WrapperNode [2021-11-07 00:56:17,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:17,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:56:17,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:56:17,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:56:17,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:17,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:17,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:56:17,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:56:17,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:56:17,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:56:17,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:17,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:17,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:17,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:18,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:18,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:18,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:18,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:56:18,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:56:18,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:56:18,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:56:18,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (1/1) ... [2021-11-07 00:56:18,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:56:18,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:18,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:56:18,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:56:18,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:56:18,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:56:18,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:56:18,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:56:32,688 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:56:32,688 INFO L299 CfgBuilder]: Removed 1143 assume(true) statements. [2021-11-07 00:56:32,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:32 BoogieIcfgContainer [2021-11-07 00:56:32,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:56:32,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:56:32,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:56:32,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:56:32,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:56:16" (1/3) ... [2021-11-07 00:56:32,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a75b535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:32, skipping insertion in model container [2021-11-07 00:56:32,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:17" (2/3) ... [2021-11-07 00:56:32,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a75b535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:32, skipping insertion in model container [2021-11-07 00:56:32,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:32" (3/3) ... [2021-11-07 00:56:32,710 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2021-11-07 00:56:32,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:56:32,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 00:56:32,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:56:32,811 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 [2021-11-07 00:56:32,812 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 00:56:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 5427 states, 5421 states have (on average 1.8989116399188342) internal successors, (10294), 5426 states have internal predecessors, (10294), 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) [2021-11-07 00:56:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 00:56:33,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:33,015 INFO L513 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] [2021-11-07 00:56:33,015 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:56:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash 770856702, now seen corresponding path program 1 times [2021-11-07 00:56:33,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:33,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59331278] [2021-11-07 00:56:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:33,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:33,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:33,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:33,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:56:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:33,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:56:33,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:33,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:33,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:33,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59331278] [2021-11-07 00:56:33,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59331278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:33,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:33,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:33,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459850985] [2021-11-07 00:56:33,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:33,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:33,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:33,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:33,826 INFO L87 Difference]: Start difference. First operand has 5427 states, 5421 states have (on average 1.8989116399188342) internal successors, (10294), 5426 states have internal predecessors, (10294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:34,389 INFO L93 Difference]: Finished difference Result 15250 states and 28923 transitions. [2021-11-07 00:56:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 00:56:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:34,483 INFO L225 Difference]: With dead ends: 15250 [2021-11-07 00:56:34,483 INFO L226 Difference]: Without dead ends: 9823 [2021-11-07 00:56:34,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2021-11-07 00:56:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 5423. [2021-11-07 00:56:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5423 states, 5418 states have (on average 1.8962716869693614) internal successors, (10274), 5422 states have internal predecessors, (10274), 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) [2021-11-07 00:56:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 10274 transitions. [2021-11-07 00:56:34,800 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 10274 transitions. Word has length 44 [2021-11-07 00:56:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:34,800 INFO L470 AbstractCegarLoop]: Abstraction has 5423 states and 10274 transitions. [2021-11-07 00:56:34,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 10274 transitions. [2021-11-07 00:56:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 00:56:34,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:34,805 INFO L513 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, 1, 1, 1, 1, 1] [2021-11-07 00:56:34,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:35,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:35,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:56:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:35,025 INFO L85 PathProgramCache]: Analyzing trace with hash 190982898, now seen corresponding path program 1 times [2021-11-07 00:56:35,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:35,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320888533] [2021-11-07 00:56:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:35,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:35,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:35,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:35,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:56:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:56:35,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:35,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320888533] [2021-11-07 00:56:35,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320888533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:35,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:35,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:56:35,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281320214] [2021-11-07 00:56:35,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:35,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:35,714 INFO L87 Difference]: Start difference. First operand 5423 states and 10274 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-07 00:56:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:36,738 INFO L93 Difference]: Finished difference Result 21657 states and 41021 transitions. [2021-11-07 00:56:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:56:36,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 49 [2021-11-07 00:56:36,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:36,847 INFO L225 Difference]: With dead ends: 21657 [2021-11-07 00:56:36,847 INFO L226 Difference]: Without dead ends: 16255 [2021-11-07 00:56:36,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:56:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16255 states. [2021-11-07 00:56:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16255 to 5401. [2021-11-07 00:56:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5396 states have (on average 1.894551519644181) internal successors, (10223), 5400 states have internal predecessors, (10223), 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) [2021-11-07 00:56:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 10223 transitions. [2021-11-07 00:56:37,175 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 10223 transitions. Word has length 49 [2021-11-07 00:56:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:37,176 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 10223 transitions. [2021-11-07 00:56:37,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-07 00:56:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 10223 transitions. [2021-11-07 00:56:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 00:56:37,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:37,187 INFO L513 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, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:37,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:37,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:37,403 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:56:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1439760622, now seen corresponding path program 1 times [2021-11-07 00:56:37,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:37,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123650109] [2021-11-07 00:56:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:37,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:37,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:37,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:37,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:56:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:56:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:37,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:38,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:38,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123650109] [2021-11-07 00:56:38,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123650109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:38,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:38,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:38,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57068569] [2021-11-07 00:56:38,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:38,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:38,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:38,140 INFO L87 Difference]: Start difference. First operand 5401 states and 10223 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-07 00:56:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:38,638 INFO L93 Difference]: Finished difference Result 15109 states and 28611 transitions. [2021-11-07 00:56:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:38,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 50 [2021-11-07 00:56:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:38,665 INFO L225 Difference]: With dead ends: 15109 [2021-11-07 00:56:38,665 INFO L226 Difference]: Without dead ends: 9729 [2021-11-07 00:56:38,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9729 states. [2021-11-07 00:56:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9729 to 5401. [2021-11-07 00:56:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5396 states have (on average 1.8934395848776873) internal successors, (10217), 5400 states have internal predecessors, (10217), 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) [2021-11-07 00:56:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 10217 transitions. [2021-11-07 00:56:38,908 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 10217 transitions. Word has length 50 [2021-11-07 00:56:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:38,909 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 10217 transitions. [2021-11-07 00:56:38,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-07 00:56:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 10217 transitions. [2021-11-07 00:56:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 00:56:38,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:38,914 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:38,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 00:56:39,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:39,129 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:56:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:39,130 INFO L85 PathProgramCache]: Analyzing trace with hash 155893919, now seen corresponding path program 1 times [2021-11-07 00:56:39,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:39,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353798067] [2021-11-07 00:56:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:39,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:39,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:39,132 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:39,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:56:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:56:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:39,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:39,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:39,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353798067] [2021-11-07 00:56:39,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353798067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:39,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:39,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:56:39,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195000403] [2021-11-07 00:56:39,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:39,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:39,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:39,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:39,909 INFO L87 Difference]: Start difference. First operand 5401 states and 10217 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2021-11-07 00:56:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:41,979 INFO L93 Difference]: Finished difference Result 30252 states and 57272 transitions. [2021-11-07 00:56:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:56:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 55 [2021-11-07 00:56:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:42,049 INFO L225 Difference]: With dead ends: 30252 [2021-11-07 00:56:42,050 INFO L226 Difference]: Without dead ends: 24875 [2021-11-07 00:56:42,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:56:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24875 states. [2021-11-07 00:56:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24875 to 5403. [2021-11-07 00:56:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5398 states have (on average 1.8921822897369396) internal successors, (10214), 5402 states have internal predecessors, (10214), 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) [2021-11-07 00:56:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 10214 transitions. [2021-11-07 00:56:42,354 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 10214 transitions. Word has length 55 [2021-11-07 00:56:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:42,356 INFO L470 AbstractCegarLoop]: Abstraction has 5403 states and 10214 transitions. [2021-11-07 00:56:42,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2021-11-07 00:56:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 10214 transitions. [2021-11-07 00:56:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 00:56:42,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:42,359 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:42,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:42,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:42,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:56:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:42,575 INFO L85 PathProgramCache]: Analyzing trace with hash -907086511, now seen corresponding path program 1 times [2021-11-07 00:56:42,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:42,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036551305] [2021-11-07 00:56:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:42,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:42,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:42,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:42,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:56:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:43,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:43,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:43,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:43,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036551305] [2021-11-07 00:56:43,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036551305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:43,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:43,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 00:56:43,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497561989] [2021-11-07 00:56:43,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:43,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:43,418 INFO L87 Difference]: Start difference. First operand 5403 states and 10214 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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) [2021-11-07 00:56:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:47,018 INFO L93 Difference]: Finished difference Result 19437 states and 36924 transitions. [2021-11-07 00:56:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:56:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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 56 [2021-11-07 00:56:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:47,053 INFO L225 Difference]: With dead ends: 19437 [2021-11-07 00:56:47,054 INFO L226 Difference]: Without dead ends: 14064 [2021-11-07 00:56:47,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14064 states. [2021-11-07 00:56:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14064 to 5403. [2021-11-07 00:56:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5398 states have (on average 1.842534271952575) internal successors, (9946), 5402 states have internal predecessors, (9946), 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) [2021-11-07 00:56:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 9946 transitions. [2021-11-07 00:56:47,284 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 9946 transitions. Word has length 56 [2021-11-07 00:56:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:47,284 INFO L470 AbstractCegarLoop]: Abstraction has 5403 states and 9946 transitions. [2021-11-07 00:56:47,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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) [2021-11-07 00:56:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 9946 transitions. [2021-11-07 00:56:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 00:56:47,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:47,289 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:47,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:47,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:47,505 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:56:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:47,505 INFO L85 PathProgramCache]: Analyzing trace with hash -17617253, now seen corresponding path program 1 times [2021-11-07 00:56:47,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:47,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784805857] [2021-11-07 00:56:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:47,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:47,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:47,507 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:47,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:56:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:47,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:56:47,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:48,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:48,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:48,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784805857] [2021-11-07 00:56:48,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784805857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:48,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:48,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 00:56:48,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933733564] [2021-11-07 00:56:48,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:48,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:48,371 INFO L87 Difference]: Start difference. First operand 5403 states and 9946 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-11-07 00:56:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:51,066 INFO L93 Difference]: Finished difference Result 27107 states and 50757 transitions. [2021-11-07 00:56:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:56:51,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 68 [2021-11-07 00:56:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:51,111 INFO L225 Difference]: With dead ends: 27107 [2021-11-07 00:56:51,111 INFO L226 Difference]: Without dead ends: 21752 [2021-11-07 00:56:51,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:56:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21752 states. [2021-11-07 00:56:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 7472. [2021-11-07 00:56:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7472 states, 7467 states have (on average 1.8430427213070846) internal successors, (13762), 7471 states have internal predecessors, (13762), 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) [2021-11-07 00:56:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7472 states to 7472 states and 13762 transitions. [2021-11-07 00:56:51,595 INFO L78 Accepts]: Start accepts. Automaton has 7472 states and 13762 transitions. Word has length 68 [2021-11-07 00:56:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:51,596 INFO L470 AbstractCegarLoop]: Abstraction has 7472 states and 13762 transitions. [2021-11-07 00:56:51,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-11-07 00:56:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 7472 states and 13762 transitions. [2021-11-07 00:56:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:56:51,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:51,600 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:51,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:51,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:56:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:51,821 INFO L85 PathProgramCache]: Analyzing trace with hash 712103995, now seen corresponding path program 1 times [2021-11-07 00:56:51,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:51,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496612547] [2021-11-07 00:56:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:51,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:51,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:51,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:51,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:56:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:52,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:56:52,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:52,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:52,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:52,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496612547] [2021-11-07 00:56:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496612547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:52,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:52,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:56:52,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108825209] [2021-11-07 00:56:52,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:52,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:52,628 INFO L87 Difference]: Start difference. First operand 7472 states and 13762 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2021-11-07 00:56:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:56,474 INFO L93 Difference]: Finished difference Result 35684 states and 66227 transitions. [2021-11-07 00:56:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:56:56,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 70 [2021-11-07 00:56:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:56,517 INFO L225 Difference]: With dead ends: 35684 [2021-11-07 00:56:56,517 INFO L226 Difference]: Without dead ends: 28259 [2021-11-07 00:56:56,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:56:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28259 states. [2021-11-07 00:56:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28259 to 9614. [2021-11-07 00:56:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9609 states have (on average 1.8412946196274327) internal successors, (17693), 9613 states have internal predecessors, (17693), 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) [2021-11-07 00:56:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 17693 transitions. [2021-11-07 00:56:56,995 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 17693 transitions. Word has length 70 [2021-11-07 00:56:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:56,995 INFO L470 AbstractCegarLoop]: Abstraction has 9614 states and 17693 transitions. [2021-11-07 00:56:56,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2021-11-07 00:56:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 17693 transitions. [2021-11-07 00:56:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 00:56:56,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:56,999 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:57,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:57,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:57,214 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:56:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:57,214 INFO L85 PathProgramCache]: Analyzing trace with hash 372239342, now seen corresponding path program 1 times [2021-11-07 00:56:57,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:57,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495993066] [2021-11-07 00:56:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:57,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:57,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:57,216 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:57,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:56:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:57,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:57,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:57,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495993066] [2021-11-07 00:56:57,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495993066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:57,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:57,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:57,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115810604] [2021-11-07 00:56:57,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:57,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:57,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:57,995 INFO L87 Difference]: Start difference. First operand 9614 states and 17693 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-07 00:57:01,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:01,624 INFO L93 Difference]: Finished difference Result 35497 states and 66116 transitions. [2021-11-07 00:57:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:57:01,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-11-07 00:57:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:01,662 INFO L225 Difference]: With dead ends: 35497 [2021-11-07 00:57:01,663 INFO L226 Difference]: Without dead ends: 25917 [2021-11-07 00:57:01,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:57:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25917 states. [2021-11-07 00:57:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25917 to 16621. [2021-11-07 00:57:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16621 states, 16616 states have (on average 1.8278165623495426) internal successors, (30371), 16620 states have internal predecessors, (30371), 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) [2021-11-07 00:57:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16621 states to 16621 states and 30371 transitions. [2021-11-07 00:57:02,468 INFO L78 Accepts]: Start accepts. Automaton has 16621 states and 30371 transitions. Word has length 71 [2021-11-07 00:57:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:02,469 INFO L470 AbstractCegarLoop]: Abstraction has 16621 states and 30371 transitions. [2021-11-07 00:57:02,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-07 00:57:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 16621 states and 30371 transitions. [2021-11-07 00:57:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:57:02,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:02,472 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:02,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:02,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:02,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash 341611366, now seen corresponding path program 1 times [2021-11-07 00:57:02,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:02,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518339351] [2021-11-07 00:57:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:02,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:02,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:02,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:02,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:57:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:57:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:03,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:03,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:03,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518339351] [2021-11-07 00:57:03,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518339351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:03,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:03,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:57:03,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651455699] [2021-11-07 00:57:03,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:57:03,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:57:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:57:03,657 INFO L87 Difference]: Start difference. First operand 16621 states and 30371 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-07 00:57:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:07,234 INFO L93 Difference]: Finished difference Result 134906 states and 247081 transitions. [2021-11-07 00:57:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:57:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 73 [2021-11-07 00:57:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:07,409 INFO L225 Difference]: With dead ends: 134906 [2021-11-07 00:57:07,410 INFO L226 Difference]: Without dead ends: 118328 [2021-11-07 00:57:07,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118328 states. [2021-11-07 00:57:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118328 to 32245. [2021-11-07 00:57:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32245 states, 32240 states have (on average 1.828908188585608) internal successors, (58964), 32244 states have internal predecessors, (58964), 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) [2021-11-07 00:57:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32245 states to 32245 states and 58964 transitions. [2021-11-07 00:57:09,281 INFO L78 Accepts]: Start accepts. Automaton has 32245 states and 58964 transitions. Word has length 73 [2021-11-07 00:57:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:09,282 INFO L470 AbstractCegarLoop]: Abstraction has 32245 states and 58964 transitions. [2021-11-07 00:57:09,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-07 00:57:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 32245 states and 58964 transitions. [2021-11-07 00:57:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:57:09,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:09,284 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:09,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:09,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:09,499 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:09,500 INFO L85 PathProgramCache]: Analyzing trace with hash -502394136, now seen corresponding path program 1 times [2021-11-07 00:57:09,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:09,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251055189] [2021-11-07 00:57:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:09,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:09,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:09,501 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:09,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:57:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:10,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:57:10,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:10,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:10,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:10,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251055189] [2021-11-07 00:57:10,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251055189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:10,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:10,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:57:10,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90498473] [2021-11-07 00:57:10,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:10,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:10,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:57:10,484 INFO L87 Difference]: Start difference. First operand 32245 states and 58964 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2021-11-07 00:57:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:11,455 INFO L93 Difference]: Finished difference Result 52028 states and 93970 transitions. [2021-11-07 00:57:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:11,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 73 [2021-11-07 00:57:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:11,496 INFO L225 Difference]: With dead ends: 52028 [2021-11-07 00:57:11,496 INFO L226 Difference]: Without dead ends: 33295 [2021-11-07 00:57:11,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:57:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33295 states. [2021-11-07 00:57:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33295 to 33285. [2021-11-07 00:57:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33285 states, 33280 states have (on average 1.8159254807692307) internal successors, (60434), 33284 states have internal predecessors, (60434), 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) [2021-11-07 00:57:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33285 states to 33285 states and 60434 transitions. [2021-11-07 00:57:12,715 INFO L78 Accepts]: Start accepts. Automaton has 33285 states and 60434 transitions. Word has length 73 [2021-11-07 00:57:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:12,715 INFO L470 AbstractCegarLoop]: Abstraction has 33285 states and 60434 transitions. [2021-11-07 00:57:12,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2021-11-07 00:57:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 33285 states and 60434 transitions. [2021-11-07 00:57:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:57:12,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:12,718 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:12,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:12,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:12,933 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:12,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1203994010, now seen corresponding path program 1 times [2021-11-07 00:57:12,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:12,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374321711] [2021-11-07 00:57:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:12,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:12,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:12,935 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:12,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:57:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:13,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:14,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:14,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374321711] [2021-11-07 00:57:14,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374321711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:14,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:14,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 00:57:14,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33008477] [2021-11-07 00:57:14,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:57:14,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:57:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:57:14,020 INFO L87 Difference]: Start difference. First operand 33285 states and 60434 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 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) [2021-11-07 00:57:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:17,693 INFO L93 Difference]: Finished difference Result 81894 states and 150123 transitions. [2021-11-07 00:57:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 00:57:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 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 73 [2021-11-07 00:57:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:17,775 INFO L225 Difference]: With dead ends: 81894 [2021-11-07 00:57:17,775 INFO L226 Difference]: Without dead ends: 63198 [2021-11-07 00:57:17,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:57:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63198 states. [2021-11-07 00:57:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63198 to 33237. [2021-11-07 00:57:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33237 states, 33232 states have (on average 1.8156596051998075) internal successors, (60338), 33236 states have internal predecessors, (60338), 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) [2021-11-07 00:57:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33237 states to 33237 states and 60338 transitions. [2021-11-07 00:57:19,093 INFO L78 Accepts]: Start accepts. Automaton has 33237 states and 60338 transitions. Word has length 73 [2021-11-07 00:57:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:19,093 INFO L470 AbstractCegarLoop]: Abstraction has 33237 states and 60338 transitions. [2021-11-07 00:57:19,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 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) [2021-11-07 00:57:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33237 states and 60338 transitions. [2021-11-07 00:57:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:57:19,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:19,096 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:19,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:19,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:19,304 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash -739112864, now seen corresponding path program 1 times [2021-11-07 00:57:19,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:19,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739574767] [2021-11-07 00:57:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:19,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:19,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:19,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:57:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:20,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:57:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:20,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:20,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:20,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739574767] [2021-11-07 00:57:20,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739574767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:20,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:20,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:57:20,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641924551] [2021-11-07 00:57:20,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:57:20,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:20,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:57:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:57:20,518 INFO L87 Difference]: Start difference. First operand 33237 states and 60338 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-07 00:57:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:24,302 INFO L93 Difference]: Finished difference Result 130171 states and 236689 transitions. [2021-11-07 00:57:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:57:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 75 [2021-11-07 00:57:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:24,496 INFO L225 Difference]: With dead ends: 130171 [2021-11-07 00:57:24,496 INFO L226 Difference]: Without dead ends: 111504 [2021-11-07 00:57:24,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111504 states. [2021-11-07 00:57:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111504 to 50533. [2021-11-07 00:57:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50533 states, 50528 states have (on average 1.8064637428752375) internal successors, (91277), 50532 states have internal predecessors, (91277), 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) [2021-11-07 00:57:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50533 states to 50533 states and 91277 transitions. [2021-11-07 00:57:26,833 INFO L78 Accepts]: Start accepts. Automaton has 50533 states and 91277 transitions. Word has length 75 [2021-11-07 00:57:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:26,833 INFO L470 AbstractCegarLoop]: Abstraction has 50533 states and 91277 transitions. [2021-11-07 00:57:26,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-07 00:57:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 50533 states and 91277 transitions. [2021-11-07 00:57:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 00:57:26,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:26,836 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:26,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 00:57:27,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:27,070 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:27,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2054997388, now seen corresponding path program 1 times [2021-11-07 00:57:27,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:27,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646907574] [2021-11-07 00:57:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:27,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:27,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:27,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:27,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:57:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:27,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:27,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:28,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:28,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646907574] [2021-11-07 00:57:28,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646907574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:28,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:28,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 00:57:28,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612671332] [2021-11-07 00:57:28,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:57:28,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:28,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:57:28,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:57:28,168 INFO L87 Difference]: Start difference. First operand 50533 states and 91277 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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) [2021-11-07 00:57:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:37,876 INFO L93 Difference]: Finished difference Result 229156 states and 415460 transitions. [2021-11-07 00:57:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:57:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 77 [2021-11-07 00:57:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:38,345 INFO L225 Difference]: With dead ends: 229156 [2021-11-07 00:57:38,345 INFO L226 Difference]: Without dead ends: 193193 [2021-11-07 00:57:38,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:57:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193193 states. [2021-11-07 00:57:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193193 to 75530. [2021-11-07 00:57:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75530 states, 75525 states have (on average 1.811400198609732) internal successors, (136806), 75529 states have internal predecessors, (136806), 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) [2021-11-07 00:57:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75530 states to 75530 states and 136806 transitions. [2021-11-07 00:57:42,364 INFO L78 Accepts]: Start accepts. Automaton has 75530 states and 136806 transitions. Word has length 77 [2021-11-07 00:57:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:42,365 INFO L470 AbstractCegarLoop]: Abstraction has 75530 states and 136806 transitions. [2021-11-07 00:57:42,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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) [2021-11-07 00:57:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 75530 states and 136806 transitions. [2021-11-07 00:57:42,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 00:57:42,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:42,368 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:42,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:42,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:42,583 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2004275665, now seen corresponding path program 1 times [2021-11-07 00:57:42,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:42,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796424178] [2021-11-07 00:57:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:42,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:42,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:42,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:42,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6da7cc5-95f2-4e7c-a6a4-ae6a452cf7c7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:57:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:57:43,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:43,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:43,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:43,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796424178] [2021-11-07 00:57:43,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796424178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:43,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:43,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:57:43,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569524283] [2021-11-07 00:57:43,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:57:43,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:43,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:57:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:57:43,803 INFO L87 Difference]: Start difference. First operand 75530 states and 136806 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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)