./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:41,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:41,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:41,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:41,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:41,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:41,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:41,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:41,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:41,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:41,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:41,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:41,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:41,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:41,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:41,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:41,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:41,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:41,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:41,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:41,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:41,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:41,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:41,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:41,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:41,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:41,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:41,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:41,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:41,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:41,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:41,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:41,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:41,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:41,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:41,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:41,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:41,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:41,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:41,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:41,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:41,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:42:41,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:41,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:41,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:41,850 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:41,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:41,851 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:41,851 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:42:41,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:41,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:41,860 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:42:41,861 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:42:41,861 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:41,862 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:42:41,862 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:42:41,862 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:42:41,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:41,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:41,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:42:41,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:41,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:41,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:41,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:41,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:41,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:41,865 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:41,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:41,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:41,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:41,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:41,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:41,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:41,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:41,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:41,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:41,871 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:42:41,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:42:41,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:41,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:41,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:41,872 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_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af [2021-11-07 01:42:42,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:42,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:42,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:42,220 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:42,222 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:42,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-07 01:42:42,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data/add0e656c/76a02283111f49fcbdd3a431aea7467d/FLAG119362fd3 [2021-11-07 01:42:43,044 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:43,045 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-07 01:42:43,090 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data/add0e656c/76a02283111f49fcbdd3a431aea7467d/FLAG119362fd3 [2021-11-07 01:42:43,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data/add0e656c/76a02283111f49fcbdd3a431aea7467d [2021-11-07 01:42:43,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:43,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:43,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:43,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:43,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:43,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:43" (1/1) ... [2021-11-07 01:42:43,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f474e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:43, skipping insertion in model container [2021-11-07 01:42:43,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:43" (1/1) ... [2021-11-07 01:42:43,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:43,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:43,557 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_837dae71-d7c5-4cf4-8150-7359bb2997b8/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-07 01:42:43,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:44,006 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:42:44,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6006c5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:44, skipping insertion in model container [2021-11-07 01:42:44,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:44,008 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:42:44,010 INFO L168 Benchmark]: Toolchain (without parser) took 805.08 ms. Allocated memory is still 119.5 MB. Free memory was 86.7 MB in the beginning and 80.0 MB in the end (delta: 6.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:44,011 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 119.5 MB. Free memory was 73.9 MB in the beginning and 73.8 MB in the end (delta: 50.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:42:44,012 INFO L168 Benchmark]: CACSL2BoogieTranslator took 801.97 ms. Allocated memory is still 119.5 MB. Free memory was 86.5 MB in the beginning and 80.0 MB in the end (delta: 6.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:44,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 119.5 MB. Free memory was 73.9 MB in the beginning and 73.8 MB in the end (delta: 50.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 801.97 ms. Allocated memory is still 119.5 MB. Free memory was 86.5 MB in the beginning and 80.0 MB in the end (delta: 6.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 404]: 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_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:46,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:46,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:46,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:46,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:46,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:46,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:46,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:46,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:46,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:46,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:46,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:46,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:46,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:46,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:46,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:46,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:46,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:46,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:46,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:46,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:46,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:46,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:46,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:46,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:46,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:46,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:46,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:46,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:46,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:46,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:46,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:46,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:46,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:46,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:46,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:46,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:46,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:46,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:46,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:46,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:46,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:42:46,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:46,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:46,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:46,957 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:46,958 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:46,958 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:46,958 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:46,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:46,959 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:46,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:46,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:46,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:46,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:46,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:46,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:46,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:46,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:46,961 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:42:46,962 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:42:46,962 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:46,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:46,962 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:46,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:46,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:46,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:42:46,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:46,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:46,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:46,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:46,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:46,965 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:42:46,965 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:46,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:46,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:46,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:46,966 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_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af [2021-11-07 01:42:47,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:47,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:47,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:47,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:47,484 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:47,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-07 01:42:47,593 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data/f77f9dd53/fda3a7138ce24c14ba6367c9fdb2275c/FLAG0eca0cbe5 [2021-11-07 01:42:48,419 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:48,419 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-07 01:42:48,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data/f77f9dd53/fda3a7138ce24c14ba6367c9fdb2275c/FLAG0eca0cbe5 [2021-11-07 01:42:48,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/data/f77f9dd53/fda3a7138ce24c14ba6367c9fdb2275c [2021-11-07 01:42:48,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:48,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:48,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:48,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:48,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:48,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:48" (1/1) ... [2021-11-07 01:42:48,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fca0fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:48, skipping insertion in model container [2021-11-07 01:42:48,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:48" (1/1) ... [2021-11-07 01:42:48,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:48,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:48,974 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_837dae71-d7c5-4cf4-8150-7359bb2997b8/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-07 01:42:49,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:49,635 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:42:49,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:49,673 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_837dae71-d7c5-4cf4-8150-7359bb2997b8/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-07 01:42:49,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:49,898 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:42:49,914 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_837dae71-d7c5-4cf4-8150-7359bb2997b8/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-07 01:42:50,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:50,087 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:42:50,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50 WrapperNode [2021-11-07 01:42:50,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:50,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:50,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:42:50,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:42:50,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:50,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:42:50,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:42:50,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:42:50,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:42:50,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:42:50,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:42:50,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:42:50,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:50,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:50,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:42:50,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:42:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:42:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:42:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:42:50,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:43:00,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:43:00,420 INFO L299 CfgBuilder]: Removed 457 assume(true) statements. [2021-11-07 01:43:00,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:00 BoogieIcfgContainer [2021-11-07 01:43:00,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:43:00,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:43:00,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:43:00,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:43:00,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:48" (1/3) ... [2021-11-07 01:43:00,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cedcafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:00, skipping insertion in model container [2021-11-07 01:43:00,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (2/3) ... [2021-11-07 01:43:00,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cedcafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:00, skipping insertion in model container [2021-11-07 01:43:00,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:00" (3/3) ... [2021-11-07 01:43:00,442 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product01.cil.c [2021-11-07 01:43:00,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:43:00,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:43:00,523 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:43:00,531 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:43:00,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:43:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 2212 states, 2206 states have (on average 1.9079782411604715) internal successors, (4209), 2211 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:43:00,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:00,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:00,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1136837276, now seen corresponding path program 1 times [2021-11-07 01:43:00,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:00,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408465255] [2021-11-07 01:43:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:00,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:00,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:00,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:43:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:01,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:43:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:01,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:01,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:01,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408465255] [2021-11-07 01:43:01,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408465255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:01,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:01,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:43:01,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529503306] [2021-11-07 01:43:01,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:43:01,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:01,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:43:01,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:43:01,489 INFO L87 Difference]: Start difference. First operand has 2212 states, 2206 states have (on average 1.9079782411604715) internal successors, (4209), 2211 states have internal predecessors, (4209), 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 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:01,641 INFO L93 Difference]: Finished difference Result 2231 states and 4232 transitions. [2021-11-07 01:43:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:43:01,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:43:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:01,712 INFO L225 Difference]: With dead ends: 2231 [2021-11-07 01:43:01,712 INFO L226 Difference]: Without dead ends: 2208 [2021-11-07 01:43:01,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:43:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-11-07 01:43:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2021-11-07 01:43:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2203 states have (on average 1.905129369042215) internal successors, (4197), 2207 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 4197 transitions. [2021-11-07 01:43:01,942 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 4197 transitions. Word has length 38 [2021-11-07 01:43:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:01,943 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 4197 transitions. [2021-11-07 01:43:01,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 4197 transitions. [2021-11-07 01:43:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:43:01,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:01,948 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] [2021-11-07 01:43:01,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:02,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:02,166 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:02,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1931640518, now seen corresponding path program 1 times [2021-11-07 01:43:02,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:02,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274391757] [2021-11-07 01:43:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:02,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:02,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:02,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:02,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:43:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:02,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:02,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:02,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:02,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274391757] [2021-11-07 01:43:02,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274391757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:02,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:02,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:02,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188928519] [2021-11-07 01:43:02,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:02,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:02,969 INFO L87 Difference]: Start difference. First operand 2208 states and 4197 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:03,183 INFO L93 Difference]: Finished difference Result 4403 states and 8375 transitions. [2021-11-07 01:43:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:03,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 [2021-11-07 01:43:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:03,207 INFO L225 Difference]: With dead ends: 4403 [2021-11-07 01:43:03,208 INFO L226 Difference]: Without dead ends: 2208 [2021-11-07 01:43:03,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-11-07 01:43:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2021-11-07 01:43:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2203 states have (on average 1.902405810258738) internal successors, (4191), 2207 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 4191 transitions. [2021-11-07 01:43:03,335 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 4191 transitions. Word has length 40 [2021-11-07 01:43:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:03,335 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 4191 transitions. [2021-11-07 01:43:03,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 4191 transitions. [2021-11-07 01:43:03,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:43:03,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:03,351 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] [2021-11-07 01:43:03,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:03,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:03,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:03,574 INFO L85 PathProgramCache]: Analyzing trace with hash 767142480, now seen corresponding path program 1 times [2021-11-07 01:43:03,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:03,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474051586] [2021-11-07 01:43:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:03,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:03,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:03,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:03,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:43:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:04,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:04,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:04,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:04,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474051586] [2021-11-07 01:43:04,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474051586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:04,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:04,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:04,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961089816] [2021-11-07 01:43:04,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:04,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:04,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:04,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:04,459 INFO L87 Difference]: Start difference. First operand 2208 states and 4191 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:04,772 INFO L93 Difference]: Finished difference Result 4367 states and 8298 transitions. [2021-11-07 01:43:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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 45 [2021-11-07 01:43:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:04,792 INFO L225 Difference]: With dead ends: 4367 [2021-11-07 01:43:04,792 INFO L226 Difference]: Without dead ends: 2181 [2021-11-07 01:43:04,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:43:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-07 01:43:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-07 01:43:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2176 states have (on average 1.9002757352941178) internal successors, (4135), 2180 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 4135 transitions. [2021-11-07 01:43:04,905 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 4135 transitions. Word has length 45 [2021-11-07 01:43:04,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:04,906 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 4135 transitions. [2021-11-07 01:43:04,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 4135 transitions. [2021-11-07 01:43:04,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:43:04,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:04,909 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] [2021-11-07 01:43:04,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:05,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:05,127 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1809717618, now seen corresponding path program 1 times [2021-11-07 01:43:05,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:05,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809092226] [2021-11-07 01:43:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:05,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:05,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:05,132 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:05,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:43:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:05,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:05,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:05,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:05,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809092226] [2021-11-07 01:43:05,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809092226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:05,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:05,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:05,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900006752] [2021-11-07 01:43:05,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:05,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:05,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:05,945 INFO L87 Difference]: Start difference. First operand 2181 states and 4135 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:06,131 INFO L93 Difference]: Finished difference Result 4340 states and 8242 transitions. [2021-11-07 01:43:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 46 [2021-11-07 01:43:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:06,149 INFO L225 Difference]: With dead ends: 4340 [2021-11-07 01:43:06,150 INFO L226 Difference]: Without dead ends: 2181 [2021-11-07 01:43:06,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-07 01:43:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-07 01:43:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2176 states have (on average 1.8975183823529411) internal successors, (4129), 2180 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 4129 transitions. [2021-11-07 01:43:06,268 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 4129 transitions. Word has length 46 [2021-11-07 01:43:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:06,268 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 4129 transitions. [2021-11-07 01:43:06,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 4129 transitions. [2021-11-07 01:43:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:43:06,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:06,272 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] [2021-11-07 01:43:06,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:06,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:06,493 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:06,493 INFO L85 PathProgramCache]: Analyzing trace with hash -689633981, now seen corresponding path program 1 times [2021-11-07 01:43:06,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:06,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365502033] [2021-11-07 01:43:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:06,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:06,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:06,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:06,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:43:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:06,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:43:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:07,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:07,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:07,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365502033] [2021-11-07 01:43:07,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365502033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:07,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:07,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:43:07,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31514144] [2021-11-07 01:43:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:07,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:07,398 INFO L87 Difference]: Start difference. First operand 2181 states and 4129 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:07,709 INFO L93 Difference]: Finished difference Result 4334 states and 8225 transitions. [2021-11-07 01:43:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 51 [2021-11-07 01:43:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:07,731 INFO L225 Difference]: With dead ends: 4334 [2021-11-07 01:43:07,732 INFO L226 Difference]: Without dead ends: 2178 [2021-11-07 01:43:07,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-11-07 01:43:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2178. [2021-11-07 01:43:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2173 states have (on average 1.8964565117349286) internal successors, (4121), 2177 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 4121 transitions. [2021-11-07 01:43:07,881 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 4121 transitions. Word has length 51 [2021-11-07 01:43:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:07,882 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 4121 transitions. [2021-11-07 01:43:07,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 4121 transitions. [2021-11-07 01:43:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:43:07,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:07,887 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] [2021-11-07 01:43:07,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:08,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:08,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1997109485, now seen corresponding path program 1 times [2021-11-07 01:43:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:08,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879777803] [2021-11-07 01:43:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:08,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:08,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:08,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:08,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:43:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:43:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:08,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:09,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:09,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879777803] [2021-11-07 01:43:09,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879777803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:09,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:09,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:43:09,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523300123] [2021-11-07 01:43:09,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:09,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:09,066 INFO L87 Difference]: Start difference. First operand 2178 states and 4121 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:11,399 INFO L93 Difference]: Finished difference Result 8768 states and 16581 transitions. [2021-11-07 01:43:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:11,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 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 52 [2021-11-07 01:43:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:11,455 INFO L225 Difference]: With dead ends: 8768 [2021-11-07 01:43:11,456 INFO L226 Difference]: Without dead ends: 6630 [2021-11-07 01:43:11,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-11-07 01:43:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 2182. [2021-11-07 01:43:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2177 states have (on average 1.894809370693615) internal successors, (4125), 2181 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 4125 transitions. [2021-11-07 01:43:11,718 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 4125 transitions. Word has length 52 [2021-11-07 01:43:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:11,718 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 4125 transitions. [2021-11-07 01:43:11,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 4125 transitions. [2021-11-07 01:43:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:43:11,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:11,723 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] [2021-11-07 01:43:11,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:11,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:11,941 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1606415413, now seen corresponding path program 1 times [2021-11-07 01:43:11,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:11,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783950490] [2021-11-07 01:43:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:11,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:11,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:11,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:11,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:43:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:12,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:12,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783950490] [2021-11-07 01:43:12,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783950490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:12,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:12,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:43:12,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808260551] [2021-11-07 01:43:12,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:12,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:12,939 INFO L87 Difference]: Start difference. First operand 2182 states and 4125 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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) [2021-11-07 01:43:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:22,562 INFO L93 Difference]: Finished difference Result 5979 states and 11248 transitions. [2021-11-07 01:43:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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 53 [2021-11-07 01:43:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:22,616 INFO L225 Difference]: With dead ends: 5979 [2021-11-07 01:43:22,616 INFO L226 Difference]: Without dead ends: 4699 [2021-11-07 01:43:22,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2021-11-07 01:43:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4008. [2021-11-07 01:43:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4003 states have (on average 1.898825880589558) internal successors, (7601), 4007 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 7601 transitions. [2021-11-07 01:43:22,922 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 7601 transitions. Word has length 53 [2021-11-07 01:43:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:22,923 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 7601 transitions. [2021-11-07 01:43:22,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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) [2021-11-07 01:43:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 7601 transitions. [2021-11-07 01:43:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:43:22,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:22,928 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] [2021-11-07 01:43:22,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:23,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:23,147 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash -681904201, now seen corresponding path program 1 times [2021-11-07 01:43:23,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:23,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479443245] [2021-11-07 01:43:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:23,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:23,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:23,154 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:23,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:43:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:24,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:24,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:24,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479443245] [2021-11-07 01:43:24,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479443245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:24,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:24,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:24,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921590449] [2021-11-07 01:43:24,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:24,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:24,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:24,292 INFO L87 Difference]: Start difference. First operand 4008 states and 7601 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:26,387 INFO L93 Difference]: Finished difference Result 7574 states and 14250 transitions. [2021-11-07 01:43:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:43:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:26,403 INFO L225 Difference]: With dead ends: 7574 [2021-11-07 01:43:26,403 INFO L226 Difference]: Without dead ends: 4460 [2021-11-07 01:43:26,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:26,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-11-07 01:43:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3911. [2021-11-07 01:43:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3911 states, 3906 states have (on average 1.880952380952381) internal successors, (7347), 3910 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3911 states to 3911 states and 7347 transitions. [2021-11-07 01:43:26,716 INFO L78 Accepts]: Start accepts. Automaton has 3911 states and 7347 transitions. Word has length 54 [2021-11-07 01:43:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:26,716 INFO L470 AbstractCegarLoop]: Abstraction has 3911 states and 7347 transitions. [2021-11-07 01:43:26,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3911 states and 7347 transitions. [2021-11-07 01:43:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:43:26,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:26,719 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:26,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:26,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:26,937 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1383941645, now seen corresponding path program 1 times [2021-11-07 01:43:26,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:26,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703619652] [2021-11-07 01:43:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:26,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:26,941 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:43:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:27,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:43:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:27,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:27,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:27,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703619652] [2021-11-07 01:43:27,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703619652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:27,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:27,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:43:27,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364087498] [2021-11-07 01:43:27,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:27,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:27,954 INFO L87 Difference]: Start difference. First operand 3911 states and 7347 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) [2021-11-07 01:43:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:29,087 INFO L93 Difference]: Finished difference Result 27955 states and 52732 transitions. [2021-11-07 01:43:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:43:29,088 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 [2021-11-07 01:43:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:29,163 INFO L225 Difference]: With dead ends: 27955 [2021-11-07 01:43:29,163 INFO L226 Difference]: Without dead ends: 24080 [2021-11-07 01:43:29,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:43:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24080 states. [2021-11-07 01:43:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24080 to 7343. [2021-11-07 01:43:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7343 states, 7338 states have (on average 1.8856636685745434) internal successors, (13837), 7342 states have internal predecessors, (13837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 13837 transitions. [2021-11-07 01:43:29,842 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 13837 transitions. Word has length 55 [2021-11-07 01:43:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:29,843 INFO L470 AbstractCegarLoop]: Abstraction has 7343 states and 13837 transitions. [2021-11-07 01:43:29,843 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) [2021-11-07 01:43:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 13837 transitions. [2021-11-07 01:43:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:43:29,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:29,846 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:29,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:30,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:30,063 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1517955151, now seen corresponding path program 1 times [2021-11-07 01:43:30,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:30,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904650636] [2021-11-07 01:43:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:30,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:30,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:30,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:43:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:30,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:31,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:31,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904650636] [2021-11-07 01:43:31,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904650636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:31,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:31,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:31,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632541198] [2021-11-07 01:43:31,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:31,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:31,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:31,118 INFO L87 Difference]: Start difference. First operand 7343 states and 13837 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 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) [2021-11-07 01:43:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:32,297 INFO L93 Difference]: Finished difference Result 22152 states and 41795 transitions. [2021-11-07 01:43:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:32,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 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 [2021-11-07 01:43:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:32,356 INFO L225 Difference]: With dead ends: 22152 [2021-11-07 01:43:32,356 INFO L226 Difference]: Without dead ends: 17932 [2021-11-07 01:43:32,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17932 states. [2021-11-07 01:43:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17932 to 11294. [2021-11-07 01:43:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11294 states, 11289 states have (on average 1.8861723801931083) internal successors, (21293), 11293 states have internal predecessors, (21293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11294 states to 11294 states and 21293 transitions. [2021-11-07 01:43:33,024 INFO L78 Accepts]: Start accepts. Automaton has 11294 states and 21293 transitions. Word has length 55 [2021-11-07 01:43:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:33,024 INFO L470 AbstractCegarLoop]: Abstraction has 11294 states and 21293 transitions. [2021-11-07 01:43:33,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 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) [2021-11-07 01:43:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 11294 states and 21293 transitions. [2021-11-07 01:43:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:43:33,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:33,027 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] [2021-11-07 01:43:33,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:33,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:33,248 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash -464517445, now seen corresponding path program 1 times [2021-11-07 01:43:33,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:33,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999727859] [2021-11-07 01:43:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:33,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:33,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:33,251 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:33,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:43:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:33,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:43:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:34,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:34,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:34,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999727859] [2021-11-07 01:43:34,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999727859] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:34,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:34,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:43:34,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293605622] [2021-11-07 01:43:34,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:34,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:34,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:34,464 INFO L87 Difference]: Start difference. First operand 11294 states and 21293 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:37,473 INFO L93 Difference]: Finished difference Result 60514 states and 114479 transitions. [2021-11-07 01:43:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:43:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 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 [2021-11-07 01:43:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:37,601 INFO L225 Difference]: With dead ends: 60514 [2021-11-07 01:43:37,601 INFO L226 Difference]: Without dead ends: 52343 [2021-11-07 01:43:37,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:43:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52343 states. [2021-11-07 01:43:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52343 to 17974. [2021-11-07 01:43:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17974 states, 17969 states have (on average 1.8894763203294562) internal successors, (33952), 17973 states have internal predecessors, (33952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17974 states to 17974 states and 33952 transitions. [2021-11-07 01:43:39,088 INFO L78 Accepts]: Start accepts. Automaton has 17974 states and 33952 transitions. Word has length 57 [2021-11-07 01:43:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:39,089 INFO L470 AbstractCegarLoop]: Abstraction has 17974 states and 33952 transitions. [2021-11-07 01:43:39,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17974 states and 33952 transitions. [2021-11-07 01:43:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:43:39,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:39,093 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] [2021-11-07 01:43:39,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:39,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:39,310 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1030522672, now seen corresponding path program 1 times [2021-11-07 01:43:39,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:39,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605203132] [2021-11-07 01:43:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:39,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:39,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:39,313 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:39,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:43:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:40,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:40,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:40,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:40,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605203132] [2021-11-07 01:43:40,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605203132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:40,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:40,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:40,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010815384] [2021-11-07 01:43:40,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:40,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:40,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:40,315 INFO L87 Difference]: Start difference. First operand 17974 states and 33952 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:42,112 INFO L93 Difference]: Finished difference Result 43556 states and 81883 transitions. [2021-11-07 01:43:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 64 [2021-11-07 01:43:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:42,165 INFO L225 Difference]: With dead ends: 43556 [2021-11-07 01:43:42,165 INFO L226 Difference]: Without dead ends: 26955 [2021-11-07 01:43:42,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26955 states. [2021-11-07 01:43:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26955 to 17851. [2021-11-07 01:43:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17851 states, 17846 states have (on average 1.8773394598229296) internal successors, (33503), 17850 states have internal predecessors, (33503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17851 states to 17851 states and 33503 transitions. [2021-11-07 01:43:43,247 INFO L78 Accepts]: Start accepts. Automaton has 17851 states and 33503 transitions. Word has length 64 [2021-11-07 01:43:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:43,248 INFO L470 AbstractCegarLoop]: Abstraction has 17851 states and 33503 transitions. [2021-11-07 01:43:43,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 17851 states and 33503 transitions. [2021-11-07 01:43:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:43:43,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:43,252 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] [2021-11-07 01:43:43,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:43,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:43,468 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:43,469 INFO L85 PathProgramCache]: Analyzing trace with hash -952811629, now seen corresponding path program 1 times [2021-11-07 01:43:43,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:43,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632589286] [2021-11-07 01:43:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:43,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:43,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:43,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:43,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:43:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:44,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:44,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:44,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632589286] [2021-11-07 01:43:44,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632589286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:44,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:44,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:44,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770959031] [2021-11-07 01:43:44,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:44,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:44,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:44,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:44,504 INFO L87 Difference]: Start difference. First operand 17851 states and 33503 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:45,420 INFO L93 Difference]: Finished difference Result 32723 states and 61355 transitions. [2021-11-07 01:43:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:45,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 64 [2021-11-07 01:43:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:45,446 INFO L225 Difference]: With dead ends: 32723 [2021-11-07 01:43:45,447 INFO L226 Difference]: Without dead ends: 17866 [2021-11-07 01:43:45,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17866 states. [2021-11-07 01:43:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17866 to 17851. [2021-11-07 01:43:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17851 states, 17846 states have (on average 1.8693824946766782) internal successors, (33361), 17850 states have internal predecessors, (33361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17851 states to 17851 states and 33361 transitions. [2021-11-07 01:43:46,398 INFO L78 Accepts]: Start accepts. Automaton has 17851 states and 33361 transitions. Word has length 64 [2021-11-07 01:43:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:46,398 INFO L470 AbstractCegarLoop]: Abstraction has 17851 states and 33361 transitions. [2021-11-07 01:43:46,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17851 states and 33361 transitions. [2021-11-07 01:43:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:43:46,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:46,400 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] [2021-11-07 01:43:46,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:46,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:46,601 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash -12378986, now seen corresponding path program 1 times [2021-11-07 01:43:46,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:46,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231114220] [2021-11-07 01:43:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:46,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:46,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:46,603 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:46,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:43:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:43:47,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:47,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:47,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:47,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231114220] [2021-11-07 01:43:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231114220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:47,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:47,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:43:47,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393697958] [2021-11-07 01:43:47,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:47,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:47,826 INFO L87 Difference]: Start difference. First operand 17851 states and 33361 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:50,894 INFO L93 Difference]: Finished difference Result 51372 states and 95917 transitions. [2021-11-07 01:43:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:43:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 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 65 [2021-11-07 01:43:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:50,952 INFO L225 Difference]: With dead ends: 51372 [2021-11-07 01:43:50,952 INFO L226 Difference]: Without dead ends: 36816 [2021-11-07 01:43:50,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:43:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36816 states. [2021-11-07 01:43:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36816 to 14863. [2021-11-07 01:43:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14863 states, 14858 states have (on average 1.8596042536007538) internal successors, (27630), 14862 states have internal predecessors, (27630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14863 states to 14863 states and 27630 transitions. [2021-11-07 01:43:51,938 INFO L78 Accepts]: Start accepts. Automaton has 14863 states and 27630 transitions. Word has length 65 [2021-11-07 01:43:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:51,938 INFO L470 AbstractCegarLoop]: Abstraction has 14863 states and 27630 transitions. [2021-11-07 01:43:51,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 14863 states and 27630 transitions. [2021-11-07 01:43:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:43:51,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:51,940 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] [2021-11-07 01:43:51,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:52,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:52,141 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)] === [2021-11-07 01:43:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:52,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1023496236, now seen corresponding path program 1 times [2021-11-07 01:43:52,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:52,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093459763] [2021-11-07 01:43:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:52,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:52,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:52,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:43:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:43:52,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:53,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:53,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:53,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093459763] [2021-11-07 01:43:53,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093459763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:53,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:53,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:43:53,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611687416] [2021-11-07 01:43:53,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:43:53,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:43:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:53,599 INFO L87 Difference]: Start difference. First operand 14863 states and 27630 transitions. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 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) [2021-11-07 01:44:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:06,124 INFO L93 Difference]: Finished difference Result 99954 states and 185320 transitions. [2021-11-07 01:44:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:44:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 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) Word has length 65 [2021-11-07 01:44:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:06,271 INFO L225 Difference]: With dead ends: 99954 [2021-11-07 01:44:06,272 INFO L226 Difference]: Without dead ends: 86520 [2021-11-07 01:44:06,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:44:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86520 states. [2021-11-07 01:44:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86520 to 35694. [2021-11-07 01:44:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35694 states, 35689 states have (on average 1.865196559163888) internal successors, (66567), 35693 states have internal predecessors, (66567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35694 states to 35694 states and 66567 transitions. [2021-11-07 01:44:08,763 INFO L78 Accepts]: Start accepts. Automaton has 35694 states and 66567 transitions. Word has length 65 [2021-11-07 01:44:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:08,763 INFO L470 AbstractCegarLoop]: Abstraction has 35694 states and 66567 transitions. [2021-11-07 01:44:08,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 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) [2021-11-07 01:44:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 35694 states and 66567 transitions. [2021-11-07 01:44:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:44:08,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:08,765 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] [2021-11-07 01:44:08,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:08,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:08,966 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)] === [2021-11-07 01:44:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2042978228, now seen corresponding path program 1 times [2021-11-07 01:44:08,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:08,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642347618] [2021-11-07 01:44:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:08,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:08,970 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:09,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:44:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:09,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:10,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:10,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:10,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642347618] [2021-11-07 01:44:10,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642347618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:10,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:10,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:10,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092397874] [2021-11-07 01:44:10,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:10,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:10,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:10,283 INFO L87 Difference]: Start difference. First operand 35694 states and 66567 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:13,739 INFO L93 Difference]: Finished difference Result 105146 states and 196212 transitions. [2021-11-07 01:44:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:13,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 01:44:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:13,867 INFO L225 Difference]: With dead ends: 105146 [2021-11-07 01:44:13,867 INFO L226 Difference]: Without dead ends: 70937 [2021-11-07 01:44:13,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70937 states. [2021-11-07 01:44:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70937 to 70935. [2021-11-07 01:44:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70935 states, 70930 states have (on average 1.866149725081066) internal successors, (132366), 70934 states have internal predecessors, (132366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70935 states to 70935 states and 132366 transitions. [2021-11-07 01:44:17,836 INFO L78 Accepts]: Start accepts. Automaton has 70935 states and 132366 transitions. Word has length 66 [2021-11-07 01:44:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:17,837 INFO L470 AbstractCegarLoop]: Abstraction has 70935 states and 132366 transitions. [2021-11-07 01:44:17,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 70935 states and 132366 transitions. [2021-11-07 01:44:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:44:17,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:17,839 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] [2021-11-07 01:44:17,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:18,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:18,040 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1461013053, now seen corresponding path program 1 times [2021-11-07 01:44:18,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:18,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772729292] [2021-11-07 01:44:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:18,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:18,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:18,043 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:18,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:44:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:19,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:19,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:19,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772729292] [2021-11-07 01:44:19,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772729292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:19,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:19,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:44:19,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831741567] [2021-11-07 01:44:19,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:19,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:19,853 INFO L87 Difference]: Start difference. First operand 70935 states and 132366 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:26,553 INFO L93 Difference]: Finished difference Result 100934 states and 188433 transitions. [2021-11-07 01:44:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:26,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 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 [2021-11-07 01:44:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:26,730 INFO L225 Difference]: With dead ends: 100934 [2021-11-07 01:44:26,730 INFO L226 Difference]: Without dead ends: 100917 [2021-11-07 01:44:26,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100917 states. [2021-11-07 01:44:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100917 to 79732. [2021-11-07 01:44:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79732 states, 79727 states have (on average 1.8661808421237474) internal successors, (148785), 79731 states have internal predecessors, (148785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79732 states to 79732 states and 148785 transitions. [2021-11-07 01:44:32,007 INFO L78 Accepts]: Start accepts. Automaton has 79732 states and 148785 transitions. Word has length 67 [2021-11-07 01:44:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:32,007 INFO L470 AbstractCegarLoop]: Abstraction has 79732 states and 148785 transitions. [2021-11-07 01:44:32,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 79732 states and 148785 transitions. [2021-11-07 01:44:32,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:44:32,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:32,012 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:32,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:44:32,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:32,229 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:32,230 INFO L85 PathProgramCache]: Analyzing trace with hash -593313736, now seen corresponding path program 1 times [2021-11-07 01:44:32,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:32,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418286939] [2021-11-07 01:44:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:32,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:32,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:32,232 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:32,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_837dae71-d7c5-4cf4-8150-7359bb2997b8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:44:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:33,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:33,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:33,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:33,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418286939] [2021-11-07 01:44:33,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418286939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:33,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:33,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:33,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381498940] [2021-11-07 01:44:33,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:33,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:33,485 INFO L87 Difference]: Start difference. First operand 79732 states and 148785 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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)