./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH --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 c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:02:32,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:02:32,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:02:32,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:02:32,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:02:32,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:02:32,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:02:32,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:02:32,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:02:32,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:02:32,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:02:32,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:02:32,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:02:32,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:02:32,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:02:32,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:02:32,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:02:32,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:02:32,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:02:32,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:02:32,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:02:32,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:02:32,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:02:32,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:02:32,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:02:32,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:02:32,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:02:32,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:02:32,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:02:32,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:02:32,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:02:32,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:02:32,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:02:32,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:02:32,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:02:32,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:02:32,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:02:32,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:02:32,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:02:32,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:02:32,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:02:32,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:02:32,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:02:32,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:02:32,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:02:32,699 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:02:32,699 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:02:32,699 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:02:32,700 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:02:32,700 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:02:32,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:02:32,706 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:02:32,707 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:02:32,708 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:02:32,708 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:02:32,708 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:02:32,708 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:02:32,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:02:32,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:02:32,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:02:32,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:02:32,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:02:32,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:02:32,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:02:32,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:02:32,711 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:02:32,711 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:02:32,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:02:32,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:02:32,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:02:32,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:02:32,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:02:32,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:02:32,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:02:32,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:02:32,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:02:32,714 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:02:32,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:02:32,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:02:32,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:02:32,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:02:32,715 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_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2021-11-03 05:02:33,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:02:33,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:02:33,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:02:33,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:02:33,045 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:02:33,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-03 05:02:33,114 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data/bd019af70/da6bd4656bcf4cf0af69527691ad7af1/FLAG30c5394b2 [2021-11-03 05:02:33,717 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:02:33,718 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-03 05:02:33,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data/bd019af70/da6bd4656bcf4cf0af69527691ad7af1/FLAG30c5394b2 [2021-11-03 05:02:34,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data/bd019af70/da6bd4656bcf4cf0af69527691ad7af1 [2021-11-03 05:02:34,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:02:34,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:02:34,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:02:34,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:02:34,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:02:34,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:02:34" (1/1) ... [2021-11-03 05:02:34,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7adaa1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:34, skipping insertion in model container [2021-11-03 05:02:34,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:02:34" (1/1) ... [2021-11-03 05:02:34,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:02:34,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:02:34,710 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_3b50404c-80ab-4d5b-bed7-f33daf5950bc/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-03 05:02:34,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:02:34,738 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) [2021-11-03 05:02:34,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2afd577f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:34, skipping insertion in model container [2021-11-03 05:02:34,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:02:34,740 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:02:34,742 INFO L168 Benchmark]: Toolchain (without parser) took 596.05 ms. Allocated memory is still 96.5 MB. Free memory was 57.1 MB in the beginning and 57.3 MB in the end (delta: -139.3 kB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:02:34,742 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 96.5 MB. Free memory was 76.5 MB in the beginning and 76.5 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:02:34,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 590.89 ms. Allocated memory is still 96.5 MB. Free memory was 56.9 MB in the beginning and 57.3 MB in the end (delta: -364.4 kB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:02:34,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 96.5 MB. Free memory was 76.5 MB in the beginning and 76.5 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 590.89 ms. Allocated memory is still 96.5 MB. Free memory was 56.9 MB in the beginning and 57.3 MB in the end (delta: -364.4 kB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2099]: 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_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH --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 c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:02:36,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:02:36,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:02:37,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:02:37,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:02:37,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:02:37,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:02:37,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:02:37,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:02:37,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:02:37,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:02:37,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:02:37,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:02:37,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:02:37,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:02:37,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:02:37,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:02:37,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:02:37,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:02:37,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:02:37,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:02:37,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:02:37,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:02:37,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:02:37,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:02:37,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:02:37,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:02:37,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:02:37,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:02:37,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:02:37,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:02:37,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:02:37,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:02:37,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:02:37,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:02:37,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:02:37,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:02:37,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:02:37,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:02:37,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:02:37,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:02:37,096 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:02:37,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:02:37,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:02:37,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:02:37,121 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:02:37,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:02:37,121 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:02:37,122 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:02:37,122 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:02:37,122 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:02:37,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:02:37,123 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:02:37,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:02:37,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:02:37,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:02:37,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:02:37,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:02:37,124 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:02:37,125 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:02:37,125 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:02:37,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:02:37,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:02:37,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:02:37,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:02:37,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:02:37,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:02:37,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:02:37,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:02:37,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:02:37,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:02:37,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:02:37,128 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:02:37,128 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:02:37,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:02:37,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:02:37,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:02:37,129 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_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2021-11-03 05:02:37,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:02:37,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:02:37,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:02:37,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:02:37,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:02:37,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-03 05:02:37,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data/79163590f/dc31674e6a284cc9ace5d79b69b652f8/FLAG15a618c7b [2021-11-03 05:02:38,313 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:02:38,315 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-03 05:02:38,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data/79163590f/dc31674e6a284cc9ace5d79b69b652f8/FLAG15a618c7b [2021-11-03 05:02:38,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/data/79163590f/dc31674e6a284cc9ace5d79b69b652f8 [2021-11-03 05:02:38,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:02:38,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:02:38,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:02:38,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:02:38,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:02:38,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:02:38" (1/1) ... [2021-11-03 05:02:38,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c545aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:38, skipping insertion in model container [2021-11-03 05:02:38,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:02:38" (1/1) ... [2021-11-03 05:02:38,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:02:38,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:02:39,185 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_3b50404c-80ab-4d5b-bed7-f33daf5950bc/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-03 05:02:39,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:02:39,206 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:02:39,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:02:39,437 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_3b50404c-80ab-4d5b-bed7-f33daf5950bc/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-03 05:02:39,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:02:39,459 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:02:39,593 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-03 05:02:39,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:02:39,626 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:02:39,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39 WrapperNode [2021-11-03 05:02:39,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:02:39,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:02:39,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:02:39,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:02:39,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:39,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:02:40,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:02:40,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:02:40,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:02:40,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:02:40,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:02:40,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:02:40,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:02:40,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (1/1) ... [2021-11-03 05:02:40,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:02:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:02:40,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:02:40,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:02:40,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:02:40,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:02:40,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:02:40,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:02:53,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:02:53,294 INFO L299 CfgBuilder]: Removed 1125 assume(true) statements. [2021-11-03 05:02:53,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:02:53 BoogieIcfgContainer [2021-11-03 05:02:53,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:02:53,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:02:53,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:02:53,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:02:53,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:02:38" (1/3) ... [2021-11-03 05:02:53,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247ff176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:02:53, skipping insertion in model container [2021-11-03 05:02:53,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:39" (2/3) ... [2021-11-03 05:02:53,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247ff176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:02:53, skipping insertion in model container [2021-11-03 05:02:53,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:02:53" (3/3) ... [2021-11-03 05:02:53,313 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2021-11-03 05:02:53,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:02:53,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 05:02:53,401 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:02:53,410 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 [2021-11-03 05:02:53,410 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 05:02:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 4860 states, 4854 states have (on average 1.8939019365471776) internal successors, (9193), 4859 states have internal predecessors, (9193), 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) [2021-11-03 05:02:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:02:53,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:53,542 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] [2021-11-03 05:02:53,546 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)] === [2021-11-03 05:02:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:53,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1694776345, now seen corresponding path program 1 times [2021-11-03 05:02:53,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:53,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904397996] [2021-11-03 05:02:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:53,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:53,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:53,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:53,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:02:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:53,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:02:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:54,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:54,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:54,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904397996] [2021-11-03 05:02:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904397996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:54,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:54,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:02:54,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425202795] [2021-11-03 05:02:54,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:02:54,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:02:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:02:54,152 INFO L87 Difference]: Start difference. First operand has 4860 states, 4854 states have (on average 1.8939019365471776) internal successors, (9193), 4859 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:54,279 INFO L93 Difference]: Finished difference Result 4879 states and 9216 transitions. [2021-11-03 05:02:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:02:54,280 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 05:02:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:54,327 INFO L225 Difference]: With dead ends: 4879 [2021-11-03 05:02:54,327 INFO L226 Difference]: Without dead ends: 4856 [2021-11-03 05:02:54,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:02:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-03 05:02:54,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-03 05:02:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4851 states have (on average 1.8925994640280355) internal successors, (9181), 4855 states have internal predecessors, (9181), 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) [2021-11-03 05:02:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9181 transitions. [2021-11-03 05:02:54,654 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9181 transitions. Word has length 27 [2021-11-03 05:02:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:54,655 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 9181 transitions. [2021-11-03 05:02:54,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9181 transitions. [2021-11-03 05:02:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 05:02:54,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:54,659 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] [2021-11-03 05:02:54,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:02:54,875 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)] === [2021-11-03 05:02:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1628752113, now seen corresponding path program 1 times [2021-11-03 05:02:54,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:54,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281630022] [2021-11-03 05:02:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:54,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:54,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:54,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:54,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:02:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:55,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:02:55,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:55,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:55,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:55,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281630022] [2021-11-03 05:02:55,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281630022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:55,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:55,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:02:55,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032403556] [2021-11-03 05:02:55,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:02:55,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:02:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:02:55,371 INFO L87 Difference]: Start difference. First operand 4856 states and 9181 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2021-11-03 05:02:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:55,602 INFO L93 Difference]: Finished difference Result 9699 states and 18343 transitions. [2021-11-03 05:02:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:02:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 29 [2021-11-03 05:02:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:55,634 INFO L225 Difference]: With dead ends: 9699 [2021-11-03 05:02:55,635 INFO L226 Difference]: Without dead ends: 4856 [2021-11-03 05:02:55,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:02:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-03 05:02:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-03 05:02:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4851 states have (on average 1.89136260564832) internal successors, (9175), 4855 states have internal predecessors, (9175), 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) [2021-11-03 05:02:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9175 transitions. [2021-11-03 05:02:55,797 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9175 transitions. Word has length 29 [2021-11-03 05:02:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:55,797 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 9175 transitions. [2021-11-03 05:02:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2021-11-03 05:02:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9175 transitions. [2021-11-03 05:02:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:02:55,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:55,800 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] [2021-11-03 05:02:55,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 05:02:56,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:02:56,013 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)] === [2021-11-03 05:02:56,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1747198523, now seen corresponding path program 1 times [2021-11-03 05:02:56,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:56,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24373481] [2021-11-03 05:02:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:56,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:56,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:56,021 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:56,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:02:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:56,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:02:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:56,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:56,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:56,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24373481] [2021-11-03 05:02:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24373481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:56,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:56,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:02:56,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254578509] [2021-11-03 05:02:56,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:02:56,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:56,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:02:56,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:02:56,584 INFO L87 Difference]: Start difference. First operand 4856 states and 9175 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:57,015 INFO L93 Difference]: Finished difference Result 9663 states and 18266 transitions. [2021-11-03 05:02:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:02:57,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 05:02:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:57,047 INFO L225 Difference]: With dead ends: 9663 [2021-11-03 05:02:57,047 INFO L226 Difference]: Without dead ends: 4829 [2021-11-03 05:02:57,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:02:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-03 05:02:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-03 05:02:57,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4824 states have (on average 1.890339966832504) internal successors, (9119), 4828 states have internal predecessors, (9119), 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) [2021-11-03 05:02:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9119 transitions. [2021-11-03 05:02:57,256 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9119 transitions. Word has length 34 [2021-11-03 05:02:57,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:57,256 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 9119 transitions. [2021-11-03 05:02:57,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9119 transitions. [2021-11-03 05:02:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 05:02:57,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:57,261 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] [2021-11-03 05:02:57,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:57,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:02:57,476 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)] === [2021-11-03 05:02:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash -706375709, now seen corresponding path program 1 times [2021-11-03 05:02:57,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:57,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662189568] [2021-11-03 05:02:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:57,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:57,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:57,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:57,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:02:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:02:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:57,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:58,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:58,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662189568] [2021-11-03 05:02:58,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662189568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:58,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:58,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:02:58,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625600352] [2021-11-03 05:02:58,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:02:58,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:02:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:02:58,036 INFO L87 Difference]: Start difference. First operand 4829 states and 9119 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:58,335 INFO L93 Difference]: Finished difference Result 9636 states and 18210 transitions. [2021-11-03 05:02:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:02:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-03 05:02:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:58,370 INFO L225 Difference]: With dead ends: 9636 [2021-11-03 05:02:58,370 INFO L226 Difference]: Without dead ends: 4829 [2021-11-03 05:02:58,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:02:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-03 05:02:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-03 05:02:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4824 states have (on average 1.8890961857379769) internal successors, (9113), 4828 states have internal predecessors, (9113), 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) [2021-11-03 05:02:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9113 transitions. [2021-11-03 05:02:58,587 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9113 transitions. Word has length 35 [2021-11-03 05:02:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:58,587 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 9113 transitions. [2021-11-03 05:02:58,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9113 transitions. [2021-11-03 05:02:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:02:58,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:58,590 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] [2021-11-03 05:02:58,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:58,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:02:58,803 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)] === [2021-11-03 05:02:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:58,804 INFO L85 PathProgramCache]: Analyzing trace with hash -891560782, now seen corresponding path program 1 times [2021-11-03 05:02:58,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:58,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669194002] [2021-11-03 05:02:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:58,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:58,807 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:58,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:02:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:59,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:02:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:59,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:59,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:59,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669194002] [2021-11-03 05:02:59,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669194002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:59,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:02:59,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976709901] [2021-11-03 05:02:59,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:02:59,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:02:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:02:59,457 INFO L87 Difference]: Start difference. First operand 4829 states and 9113 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2021-11-03 05:02:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:59,857 INFO L93 Difference]: Finished difference Result 9630 states and 18193 transitions. [2021-11-03 05:02:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:02:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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 40 [2021-11-03 05:02:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:59,889 INFO L225 Difference]: With dead ends: 9630 [2021-11-03 05:02:59,889 INFO L226 Difference]: Without dead ends: 4826 [2021-11-03 05:02:59,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:02:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-03 05:03:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-11-03 05:03:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4821 states have (on average 1.8886123210952084) internal successors, (9105), 4825 states have internal predecessors, (9105), 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) [2021-11-03 05:03:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 9105 transitions. [2021-11-03 05:03:00,131 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 9105 transitions. Word has length 40 [2021-11-03 05:03:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:00,131 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 9105 transitions. [2021-11-03 05:03:00,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2021-11-03 05:03:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 9105 transitions. [2021-11-03 05:03:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 05:03:00,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:00,133 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] [2021-11-03 05:03:00,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:00,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:00,347 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)] === [2021-11-03 05:03:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1789484258, now seen corresponding path program 1 times [2021-11-03 05:03:00,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:00,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652946140] [2021-11-03 05:03:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:00,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:00,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:00,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:00,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:03:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:03:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:00,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:01,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:01,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652946140] [2021-11-03 05:03:01,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652946140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:01,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:01,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:03:01,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255578890] [2021-11-03 05:03:01,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:01,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:01,120 INFO L87 Difference]: Start difference. First operand 4826 states and 9105 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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) [2021-11-03 05:03:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:01,696 INFO L93 Difference]: Finished difference Result 13250 states and 25057 transitions. [2021-11-03 05:03:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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 41 [2021-11-03 05:03:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:01,729 INFO L225 Difference]: With dead ends: 13250 [2021-11-03 05:03:01,729 INFO L226 Difference]: Without dead ends: 10795 [2021-11-03 05:03:01,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-11-03 05:03:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 6386. [2021-11-03 05:03:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6381 states have (on average 1.8901426108760382) internal successors, (12061), 6385 states have internal predecessors, (12061), 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) [2021-11-03 05:03:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 12061 transitions. [2021-11-03 05:03:02,033 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 12061 transitions. Word has length 41 [2021-11-03 05:03:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:02,034 INFO L470 AbstractCegarLoop]: Abstraction has 6386 states and 12061 transitions. [2021-11-03 05:03:02,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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) [2021-11-03 05:03:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 12061 transitions. [2021-11-03 05:03:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:03:02,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:02,038 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] [2021-11-03 05:03:02,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:02,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:02,256 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)] === [2021-11-03 05:03:02,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:02,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1006597301, now seen corresponding path program 1 times [2021-11-03 05:03:02,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:02,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656245076] [2021-11-03 05:03:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:02,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:02,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:02,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:02,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:03:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:03:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:02,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:03,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:03,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656245076] [2021-11-03 05:03:03,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656245076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:03,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:03,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 05:03:03,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392973033] [2021-11-03 05:03:03,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:03:03,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:03:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:03:03,021 INFO L87 Difference]: Start difference. First operand 6386 states and 12061 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 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) [2021-11-03 05:03:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:03,732 INFO L93 Difference]: Finished difference Result 12204 states and 22830 transitions. [2021-11-03 05:03:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:03:03,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 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 54 [2021-11-03 05:03:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:03,753 INFO L225 Difference]: With dead ends: 12204 [2021-11-03 05:03:03,753 INFO L226 Difference]: Without dead ends: 7037 [2021-11-03 05:03:03,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:03:03,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7037 states. [2021-11-03 05:03:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7037 to 4741. [2021-11-03 05:03:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4736 states have (on average 1.8817567567567568) internal successors, (8912), 4740 states have internal predecessors, (8912), 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) [2021-11-03 05:03:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 8912 transitions. [2021-11-03 05:03:03,971 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 8912 transitions. Word has length 54 [2021-11-03 05:03:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:03,971 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 8912 transitions. [2021-11-03 05:03:03,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 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) [2021-11-03 05:03:03,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 8912 transitions. [2021-11-03 05:03:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 05:03:03,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:03,974 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] [2021-11-03 05:03:03,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:04,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:04,187 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)] === [2021-11-03 05:03:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:04,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1899706606, now seen corresponding path program 1 times [2021-11-03 05:03:04,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:04,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40237671] [2021-11-03 05:03:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:04,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:04,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:04,191 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:04,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:03:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:03:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:04,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:05,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:05,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40237671] [2021-11-03 05:03:05,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40237671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:05,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:05,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:03:05,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968405835] [2021-11-03 05:03:05,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:03:05,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:03:05,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:03:05,012 INFO L87 Difference]: Start difference. First operand 4741 states and 8912 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:07,387 INFO L93 Difference]: Finished difference Result 19060 states and 35777 transitions. [2021-11-03 05:03:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:03:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-03 05:03:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:07,433 INFO L225 Difference]: With dead ends: 19060 [2021-11-03 05:03:07,433 INFO L226 Difference]: Without dead ends: 14362 [2021-11-03 05:03:07,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:03:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14362 states. [2021-11-03 05:03:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14362 to 4749. [2021-11-03 05:03:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 4744 states have (on average 1.8802698145025296) internal successors, (8920), 4748 states have internal predecessors, (8920), 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) [2021-11-03 05:03:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 8920 transitions. [2021-11-03 05:03:07,830 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 8920 transitions. Word has length 55 [2021-11-03 05:03:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:07,830 INFO L470 AbstractCegarLoop]: Abstraction has 4749 states and 8920 transitions. [2021-11-03 05:03:07,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:07,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 8920 transitions. [2021-11-03 05:03:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:03:07,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:07,833 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] [2021-11-03 05:03:07,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:08,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:08,047 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)] === [2021-11-03 05:03:08,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash 175354806, now seen corresponding path program 1 times [2021-11-03 05:03:08,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:08,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964990254] [2021-11-03 05:03:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:08,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:08,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:08,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:08,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:03:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:08,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:03:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:08,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:08,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:08,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964990254] [2021-11-03 05:03:08,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964990254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:08,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:08,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:03:08,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583710677] [2021-11-03 05:03:08,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:03:08,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:08,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:03:08,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:03:08,759 INFO L87 Difference]: Start difference. First operand 4749 states and 8920 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-11-03 05:03:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:15,899 INFO L93 Difference]: Finished difference Result 13321 states and 24966 transitions. [2021-11-03 05:03:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:03:15,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 [2021-11-03 05:03:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:15,927 INFO L225 Difference]: With dead ends: 13321 [2021-11-03 05:03:15,927 INFO L226 Difference]: Without dead ends: 9964 [2021-11-03 05:03:15,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:03:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9964 states. [2021-11-03 05:03:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9964 to 8917. [2021-11-03 05:03:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8912 states have (on average 1.882181328545781) internal successors, (16774), 8916 states have internal predecessors, (16774), 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) [2021-11-03 05:03:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 16774 transitions. [2021-11-03 05:03:16,366 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 16774 transitions. Word has length 56 [2021-11-03 05:03:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:16,367 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 16774 transitions. [2021-11-03 05:03:16,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-11-03 05:03:16,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 16774 transitions. [2021-11-03 05:03:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:03:16,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:16,371 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] [2021-11-03 05:03:16,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:16,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:16,585 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)] === [2021-11-03 05:03:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash 929178046, now seen corresponding path program 1 times [2021-11-03 05:03:16,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:16,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051795280] [2021-11-03 05:03:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:16,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:16,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:16,587 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:16,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:03:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:03:17,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:17,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:17,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:17,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051795280] [2021-11-03 05:03:17,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051795280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:17,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:17,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:03:17,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103168864] [2021-11-03 05:03:17,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:17,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:17,355 INFO L87 Difference]: Start difference. First operand 8917 states and 16774 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-03 05:03:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:19,281 INFO L93 Difference]: Finished difference Result 17381 states and 32520 transitions. [2021-11-03 05:03:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:03:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2021-11-03 05:03:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:19,301 INFO L225 Difference]: With dead ends: 17381 [2021-11-03 05:03:19,301 INFO L226 Difference]: Without dead ends: 9848 [2021-11-03 05:03:19,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:03:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-03 05:03:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 8849. [2021-11-03 05:03:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8844 states have (on average 1.8713251922207146) internal successors, (16550), 8848 states have internal predecessors, (16550), 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) [2021-11-03 05:03:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 16550 transitions. [2021-11-03 05:03:19,819 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 16550 transitions. Word has length 57 [2021-11-03 05:03:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:19,820 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 16550 transitions. [2021-11-03 05:03:19,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-03 05:03:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 16550 transitions. [2021-11-03 05:03:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:03:19,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:19,822 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] [2021-11-03 05:03:19,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:20,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:20,055 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)] === [2021-11-03 05:03:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash 547951710, now seen corresponding path program 1 times [2021-11-03 05:03:20,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:20,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979794250] [2021-11-03 05:03:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:20,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:20,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:20,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:03:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:20,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:03:20,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:20,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:20,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:20,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979794250] [2021-11-03 05:03:20,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979794250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:20,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:20,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:03:20,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466029849] [2021-11-03 05:03:20,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:03:20,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:03:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:03:20,872 INFO L87 Difference]: Start difference. First operand 8849 states and 16550 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-03 05:03:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:22,848 INFO L93 Difference]: Finished difference Result 64605 states and 121111 transitions. [2021-11-03 05:03:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:03:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-03 05:03:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:22,935 INFO L225 Difference]: With dead ends: 64605 [2021-11-03 05:03:22,935 INFO L226 Difference]: Without dead ends: 55795 [2021-11-03 05:03:22,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:03:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55795 states. [2021-11-03 05:03:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55795 to 16688. [2021-11-03 05:03:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16688 states, 16683 states have (on average 1.8722052388659114) internal successors, (31234), 16687 states have internal predecessors, (31234), 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) [2021-11-03 05:03:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16688 states to 16688 states and 31234 transitions. [2021-11-03 05:03:24,322 INFO L78 Accepts]: Start accepts. Automaton has 16688 states and 31234 transitions. Word has length 58 [2021-11-03 05:03:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:24,323 INFO L470 AbstractCegarLoop]: Abstraction has 16688 states and 31234 transitions. [2021-11-03 05:03:24,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-03 05:03:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 16688 states and 31234 transitions. [2021-11-03 05:03:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:03:24,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:24,326 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] [2021-11-03 05:03:24,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:24,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:24,526 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)] === [2021-11-03 05:03:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash 413938204, now seen corresponding path program 1 times [2021-11-03 05:03:24,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:24,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133749435] [2021-11-03 05:03:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:24,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:24,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:24,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:24,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:03:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:24,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:03:24,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:25,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:25,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:25,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133749435] [2021-11-03 05:03:25,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133749435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:25,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:25,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:03:25,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254901894] [2021-11-03 05:03:25,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:25,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:25,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:25,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:25,289 INFO L87 Difference]: Start difference. First operand 16688 states and 31234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-11-03 05:03:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:26,899 INFO L93 Difference]: Finished difference Result 60853 states and 114101 transitions. [2021-11-03 05:03:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:03:26,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2021-11-03 05:03:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:26,961 INFO L225 Difference]: With dead ends: 60853 [2021-11-03 05:03:26,961 INFO L226 Difference]: Without dead ends: 48801 [2021-11-03 05:03:26,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:03:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48801 states. [2021-11-03 05:03:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48801 to 28183. [2021-11-03 05:03:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28183 states, 28178 states have (on average 1.8738732344382143) internal successors, (52802), 28182 states have internal predecessors, (52802), 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) [2021-11-03 05:03:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28183 states to 28183 states and 52802 transitions. [2021-11-03 05:03:28,458 INFO L78 Accepts]: Start accepts. Automaton has 28183 states and 52802 transitions. Word has length 58 [2021-11-03 05:03:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:28,458 INFO L470 AbstractCegarLoop]: Abstraction has 28183 states and 52802 transitions. [2021-11-03 05:03:28,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-11-03 05:03:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28183 states and 52802 transitions. [2021-11-03 05:03:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:03:28,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:28,461 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] [2021-11-03 05:03:28,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 05:03:28,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:28,675 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)] === [2021-11-03 05:03:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1610349402, now seen corresponding path program 1 times [2021-11-03 05:03:28,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:28,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92552984] [2021-11-03 05:03:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:28,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:28,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:28,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:28,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:03:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:29,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:03:29,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:29,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:29,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:29,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92552984] [2021-11-03 05:03:29,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92552984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:29,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:29,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:03:29,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650560288] [2021-11-03 05:03:29,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:03:29,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:29,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:03:29,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:03:29,549 INFO L87 Difference]: Start difference. First operand 28183 states and 52802 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 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) [2021-11-03 05:03:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:36,428 INFO L93 Difference]: Finished difference Result 178393 states and 334893 transitions. [2021-11-03 05:03:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:03:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 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) Word has length 60 [2021-11-03 05:03:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:36,663 INFO L225 Difference]: With dead ends: 178393 [2021-11-03 05:03:36,663 INFO L226 Difference]: Without dead ends: 154846 [2021-11-03 05:03:36,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:03:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154846 states. [2021-11-03 05:03:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154846 to 49001. [2021-11-03 05:03:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49001 states, 48996 states have (on average 1.8754592211609111) internal successors, (91890), 49000 states have internal predecessors, (91890), 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) [2021-11-03 05:03:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49001 states to 49001 states and 91890 transitions. [2021-11-03 05:03:39,784 INFO L78 Accepts]: Start accepts. Automaton has 49001 states and 91890 transitions. Word has length 60 [2021-11-03 05:03:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:39,784 INFO L470 AbstractCegarLoop]: Abstraction has 49001 states and 91890 transitions. [2021-11-03 05:03:39,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 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) [2021-11-03 05:03:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 49001 states and 91890 transitions. [2021-11-03 05:03:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:03:39,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:39,787 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] [2021-11-03 05:03:39,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:39,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:39,988 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)] === [2021-11-03 05:03:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:39,989 INFO L85 PathProgramCache]: Analyzing trace with hash -491605417, now seen corresponding path program 1 times [2021-11-03 05:03:39,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:39,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252629775] [2021-11-03 05:03:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:39,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:39,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:39,990 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:39,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:03:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:03:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:40,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:40,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:40,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252629775] [2021-11-03 05:03:40,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252629775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:40,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:40,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:03:40,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918827499] [2021-11-03 05:03:40,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:40,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:40,779 INFO L87 Difference]: Start difference. First operand 49001 states and 91890 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-03 05:03:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:44,654 INFO L93 Difference]: Finished difference Result 121013 states and 226325 transitions. [2021-11-03 05:03:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 67 [2021-11-03 05:03:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:44,758 INFO L225 Difference]: With dead ends: 121013 [2021-11-03 05:03:44,758 INFO L226 Difference]: Without dead ends: 73900 [2021-11-03 05:03:44,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73900 states. [2021-11-03 05:03:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73900 to 48761. [2021-11-03 05:03:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 48756 states have (on average 1.866724095495939) internal successors, (91014), 48760 states have internal predecessors, (91014), 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) [2021-11-03 05:03:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 91014 transitions. [2021-11-03 05:03:47,173 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 91014 transitions. Word has length 67 [2021-11-03 05:03:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:47,173 INFO L470 AbstractCegarLoop]: Abstraction has 48761 states and 91014 transitions. [2021-11-03 05:03:47,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-03 05:03:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 91014 transitions. [2021-11-03 05:03:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:03:47,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:47,176 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] [2021-11-03 05:03:47,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:47,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:47,390 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:03:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash -413894374, now seen corresponding path program 1 times [2021-11-03 05:03:47,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:47,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135409454] [2021-11-03 05:03:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:47,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:47,393 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:47,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:03:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:47,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:03:47,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:48,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:48,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:48,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135409454] [2021-11-03 05:03:48,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135409454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:48,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:48,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:03:48,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047035109] [2021-11-03 05:03:48,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:48,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:48,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:48,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:48,224 INFO L87 Difference]: Start difference. First operand 48761 states and 91014 transitions. Second operand has 4 states, 4 states have (on average 18.75) 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) [2021-11-03 05:03:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:50,306 INFO L93 Difference]: Finished difference Result 93033 states and 173618 transitions. [2021-11-03 05:03:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:03:50,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) 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 67 [2021-11-03 05:03:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:50,373 INFO L225 Difference]: With dead ends: 93033 [2021-11-03 05:03:50,373 INFO L226 Difference]: Without dead ends: 48776 [2021-11-03 05:03:50,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48776 states. [2021-11-03 05:03:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48776 to 48761. [2021-11-03 05:03:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 48756 states have (on average 1.861391418492083) internal successors, (90754), 48760 states have internal predecessors, (90754), 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) [2021-11-03 05:03:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 90754 transitions. [2021-11-03 05:03:52,651 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 90754 transitions. Word has length 67 [2021-11-03 05:03:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:52,651 INFO L470 AbstractCegarLoop]: Abstraction has 48761 states and 90754 transitions. [2021-11-03 05:03:52,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) 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) [2021-11-03 05:03:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 90754 transitions. [2021-11-03 05:03:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 05:03:52,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:52,653 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] [2021-11-03 05:03:52,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:52,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:52,866 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:03:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1724967041, now seen corresponding path program 1 times [2021-11-03 05:03:52,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:52,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734245452] [2021-11-03 05:03:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:52,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:52,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:52,869 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:52,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b50404c-80ab-4d5b-bed7-f33daf5950bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:03:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:53,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:03:53,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:53,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:53,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:53,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734245452] [2021-11-03 05:03:53,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734245452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:53,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:53,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:03:53,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102181014] [2021-11-03 05:03:53,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:03:53,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:03:53,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:03:53,937 INFO L87 Difference]: Start difference. First operand 48761 states and 90754 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 5 states have internal predecessors, (121), 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)