./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product25.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_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/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_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/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_a2538214-d246-46bb-9484-181cef6b7e61/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 be72096c105f582e8528565b95ebbdcff5f4be75e7838295d3ddf5b4552aba69 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:54:59,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:54:59,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:54:59,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:54:59,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:54:59,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:54:59,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:54:59,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:54:59,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:54:59,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:54:59,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:54:59,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:54:59,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:54:59,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:54:59,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:54:59,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:54:59,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:54:59,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:54:59,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:54:59,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:54:59,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:54:59,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:54:59,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:54:59,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:54:59,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:54:59,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:54:59,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:54:59,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:54:59,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:54:59,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:54:59,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:54:59,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:54:59,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:54:59,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:54:59,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:54:59,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:54:59,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:54:59,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:54:59,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:54:59,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:54:59,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:54:59,674 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:54:59,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:54:59,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:54:59,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:54:59,718 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:54:59,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:54:59,719 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:54:59,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:54:59,720 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:54:59,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:54:59,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:54:59,721 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:54:59,722 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:54:59,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:54:59,722 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:54:59,723 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:54:59,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:54:59,724 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:54:59,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:54:59,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:54:59,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:54:59,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:54:59,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:54:59,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:54:59,726 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:54:59,726 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:54:59,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:54:59,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:54:59,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:54:59,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:54:59,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:54:59,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:59,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:54:59,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:54:59,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:54:59,731 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:54:59,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:54:59,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:54:59,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:54:59,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:54:59,732 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_a2538214-d246-46bb-9484-181cef6b7e61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be72096c105f582e8528565b95ebbdcff5f4be75e7838295d3ddf5b4552aba69 [2021-11-07 01:55:00,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:55:00,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:55:00,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:55:00,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:55:00,054 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:55:00,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product25.cil.c [2021-11-07 01:55:00,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data/f71d64d4f/755832785eb34be1bf6d9739f166d925/FLAG8094f84e5 [2021-11-07 01:55:00,689 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:55:00,689 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/sv-benchmarks/c/product-lines/email_spec0_product25.cil.c [2021-11-07 01:55:00,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data/f71d64d4f/755832785eb34be1bf6d9739f166d925/FLAG8094f84e5 [2021-11-07 01:55:00,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data/f71d64d4f/755832785eb34be1bf6d9739f166d925 [2021-11-07 01:55:00,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:55:00,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:55:00,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:00,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:55:00,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:55:00,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:00" (1/1) ... [2021-11-07 01:55:00,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193648d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:00, skipping insertion in model container [2021-11-07 01:55:00,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:00" (1/1) ... [2021-11-07 01:55:00,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:55:01,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:01,564 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_a2538214-d246-46bb-9484-181cef6b7e61/sv-benchmarks/c/product-lines/email_spec0_product25.cil.c[43418,43431] [2021-11-07 01:55:01,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:01,704 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 01:55:01,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@dcebdd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:01, skipping insertion in model container [2021-11-07 01:55:01,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:01,706 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:55:01,708 INFO L168 Benchmark]: Toolchain (without parser) took 776.04 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 51.5 MB in the beginning and 96.9 MB in the end (delta: -45.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:55:01,710 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:55:01,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 772.15 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 51.3 MB in the beginning and 96.9 MB in the end (delta: -45.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:55:01,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 772.15 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 51.3 MB in the beginning and 96.9 MB in the end (delta: -45.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2165]: 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_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/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_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/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_a2538214-d246-46bb-9484-181cef6b7e61/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 be72096c105f582e8528565b95ebbdcff5f4be75e7838295d3ddf5b4552aba69 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:55:03,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:55:03,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:55:04,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:55:04,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:55:04,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:55:04,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:55:04,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:55:04,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:55:04,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:55:04,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:55:04,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:55:04,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:55:04,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:55:04,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:55:04,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:55:04,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:55:04,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:55:04,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:55:04,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:55:04,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:55:04,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:55:04,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:55:04,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:55:04,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:55:04,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:55:04,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:55:04,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:55:04,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:55:04,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:55:04,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:55:04,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:55:04,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:55:04,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:55:04,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:55:04,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:55:04,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:55:04,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:55:04,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:55:04,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:55:04,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:55:04,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:55:04,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:55:04,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:55:04,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:55:04,164 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:55:04,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:55:04,164 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:55:04,164 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:55:04,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:55:04,165 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:55:04,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:55:04,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:55:04,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:55:04,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:55:04,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:55:04,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:55:04,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:55:04,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:55:04,169 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:55:04,169 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:55:04,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:55:04,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:55:04,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:55:04,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:55:04,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:55:04,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:55:04,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:55:04,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:04,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:55:04,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:55:04,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:55:04,172 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:55:04,173 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:04,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:55:04,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:55:04,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:55:04,174 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_a2538214-d246-46bb-9484-181cef6b7e61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be72096c105f582e8528565b95ebbdcff5f4be75e7838295d3ddf5b4552aba69 [2021-11-07 01:55:04,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:55:04,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:55:04,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:55:04,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:55:04,535 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:55:04,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product25.cil.c [2021-11-07 01:55:04,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data/ef28a9d1f/3e336d417d8b47eba7a780726c1764be/FLAGd41b1e839 [2021-11-07 01:55:05,263 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:55:05,264 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/sv-benchmarks/c/product-lines/email_spec0_product25.cil.c [2021-11-07 01:55:05,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data/ef28a9d1f/3e336d417d8b47eba7a780726c1764be/FLAGd41b1e839 [2021-11-07 01:55:05,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/data/ef28a9d1f/3e336d417d8b47eba7a780726c1764be [2021-11-07 01:55:05,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:55:05,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:55:05,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:05,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:55:05,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:55:05,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:05" (1/1) ... [2021-11-07 01:55:05,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e186eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:05, skipping insertion in model container [2021-11-07 01:55:05,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:05" (1/1) ... [2021-11-07 01:55:05,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:55:05,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:06,204 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_a2538214-d246-46bb-9484-181cef6b7e61/sv-benchmarks/c/product-lines/email_spec0_product25.cil.c[43418,43431] [2021-11-07 01:55:06,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:06,384 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:55:06,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:06,507 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_a2538214-d246-46bb-9484-181cef6b7e61/sv-benchmarks/c/product-lines/email_spec0_product25.cil.c[43418,43431] [2021-11-07 01:55:06,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:06,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:55:06,613 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_a2538214-d246-46bb-9484-181cef6b7e61/sv-benchmarks/c/product-lines/email_spec0_product25.cil.c[43418,43431] [2021-11-07 01:55:06,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:06,685 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:55:06,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06 WrapperNode [2021-11-07 01:55:06,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:06,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:55:06,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:55:06,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:55:06,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:06,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:06,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:55:06,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:55:06,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:55:06,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:55:06,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:06,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:06,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:06,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:06,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:07,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:07,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:07,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:55:07,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:55:07,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:55:07,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:55:07,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (1/1) ... [2021-11-07 01:55:07,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:07,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:55:07,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:55:07,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:55:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:55:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:55:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:55:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:55:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:55:12,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:55:12,513 INFO L299 CfgBuilder]: Removed 609 assume(true) statements. [2021-11-07 01:55:12,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:12 BoogieIcfgContainer [2021-11-07 01:55:12,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:55:12,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:55:12,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:55:12,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:55:12,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:55:05" (1/3) ... [2021-11-07 01:55:12,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f393c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:12, skipping insertion in model container [2021-11-07 01:55:12,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:06" (2/3) ... [2021-11-07 01:55:12,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f393c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:12, skipping insertion in model container [2021-11-07 01:55:12,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:12" (3/3) ... [2021-11-07 01:55:12,526 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product25.cil.c [2021-11-07 01:55:12,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:55:12,532 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:55:12,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:55:12,601 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 01:55:12,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:55:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 870 states, 863 states have (on average 1.7265353418308227) internal successors, (1490), 869 states have internal predecessors, (1490), 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 01:55:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:55:12,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:12,678 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:12,679 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1221282420, now seen corresponding path program 1 times [2021-11-07 01:55:12,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:12,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44612286] [2021-11-07 01:55:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:12,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:12,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:12,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:12,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:55:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:13,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:55:13,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:13,364 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 01:55:13,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:13,496 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 01:55:13,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:13,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44612286] [2021-11-07 01:55:13,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44612286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:13,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:13,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:55:13,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692853570] [2021-11-07 01:55:13,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:55:13,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:55:13,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:55:13,521 INFO L87 Difference]: Start difference. First operand has 870 states, 863 states have (on average 1.7265353418308227) internal successors, (1490), 869 states have internal predecessors, (1490), 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 25.0) internal successors, (50), 2 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 01:55:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:13,683 INFO L93 Difference]: Finished difference Result 1455 states and 2457 transitions. [2021-11-07 01:55:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:55:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 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 50 [2021-11-07 01:55:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:13,728 INFO L225 Difference]: With dead ends: 1455 [2021-11-07 01:55:13,732 INFO L226 Difference]: Without dead ends: 820 [2021-11-07 01:55:13,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 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 01:55:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-11-07 01:55:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 820. [2021-11-07 01:55:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 814 states have (on average 1.7235872235872236) internal successors, (1403), 819 states have internal predecessors, (1403), 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 01:55:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1403 transitions. [2021-11-07 01:55:13,876 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1403 transitions. Word has length 50 [2021-11-07 01:55:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:13,876 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1403 transitions. [2021-11-07 01:55:13,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 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 01:55:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1403 transitions. [2021-11-07 01:55:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:55:13,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:13,880 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 01:55:13,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:14,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:14,097 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash -869512508, now seen corresponding path program 1 times [2021-11-07 01:55:14,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:14,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345006024] [2021-11-07 01:55:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:14,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:14,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:14,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:55:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:14,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:14,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:14,668 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 01:55:14,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:14,811 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 01:55:14,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:14,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345006024] [2021-11-07 01:55:14,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345006024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:14,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:14,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:55:14,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576588311] [2021-11-07 01:55:14,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:14,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:14,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:14,821 INFO L87 Difference]: Start difference. First operand 820 states and 1403 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 01:55:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:15,014 INFO L93 Difference]: Finished difference Result 2430 states and 4161 transitions. [2021-11-07 01:55:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:15,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 01:55:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:15,030 INFO L225 Difference]: With dead ends: 2430 [2021-11-07 01:55:15,030 INFO L226 Difference]: Without dead ends: 1625 [2021-11-07 01:55:15,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:55:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-11-07 01:55:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 819. [2021-11-07 01:55:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 813 states have (on average 1.7195571955719557) internal successors, (1398), 818 states have internal predecessors, (1398), 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 01:55:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1398 transitions. [2021-11-07 01:55:15,085 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1398 transitions. Word has length 51 [2021-11-07 01:55:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:15,087 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1398 transitions. [2021-11-07 01:55:15,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 01:55:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1398 transitions. [2021-11-07 01:55:15,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:55:15,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:15,099 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 01:55:15,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:15,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:15,324 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash -174347094, now seen corresponding path program 1 times [2021-11-07 01:55:15,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:15,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102992785] [2021-11-07 01:55:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:15,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:15,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:15,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:15,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:55:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:55:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:15,916 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 01:55:15,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:16,090 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 01:55:16,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:16,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102992785] [2021-11-07 01:55:16,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102992785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:16,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:16,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:55:16,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443714867] [2021-11-07 01:55:16,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:55:16,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:16,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:55:16,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:55:16,093 INFO L87 Difference]: Start difference. First operand 819 states and 1398 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:16,394 INFO L93 Difference]: Finished difference Result 3193 states and 5454 transitions. [2021-11-07 01:55:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:55:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:16,410 INFO L225 Difference]: With dead ends: 3193 [2021-11-07 01:55:16,410 INFO L226 Difference]: Without dead ends: 2392 [2021-11-07 01:55:16,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:55:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-11-07 01:55:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 818. [2021-11-07 01:55:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 812 states have (on average 1.7167487684729064) internal successors, (1394), 817 states have internal predecessors, (1394), 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 01:55:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1394 transitions. [2021-11-07 01:55:16,476 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1394 transitions. Word has length 53 [2021-11-07 01:55:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:16,477 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1394 transitions. [2021-11-07 01:55:16,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1394 transitions. [2021-11-07 01:55:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:55:16,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:16,479 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 01:55:16,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:16,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:16,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1545025667, now seen corresponding path program 1 times [2021-11-07 01:55:16,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:16,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488612936] [2021-11-07 01:55:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:16,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:16,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:16,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:16,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:55:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:17,280 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 01:55:17,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:17,419 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 01:55:17,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:17,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488612936] [2021-11-07 01:55:17,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488612936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:17,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:17,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:55:17,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134855565] [2021-11-07 01:55:17,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:17,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:17,423 INFO L87 Difference]: Start difference. First operand 818 states and 1394 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:17,516 INFO L93 Difference]: Finished difference Result 1633 states and 2785 transitions. [2021-11-07 01:55:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:17,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:55:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:17,522 INFO L225 Difference]: With dead ends: 1633 [2021-11-07 01:55:17,522 INFO L226 Difference]: Without dead ends: 823 [2021-11-07 01:55:17,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 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 01:55:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-11-07 01:55:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 818. [2021-11-07 01:55:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 812 states have (on average 1.7130541871921183) internal successors, (1391), 817 states have internal predecessors, (1391), 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 01:55:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1391 transitions. [2021-11-07 01:55:17,580 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1391 transitions. Word has length 54 [2021-11-07 01:55:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:17,582 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1391 transitions. [2021-11-07 01:55:17,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1391 transitions. [2021-11-07 01:55:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:55:17,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:17,585 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 01:55:17,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:17,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:17,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1116605842, now seen corresponding path program 1 times [2021-11-07 01:55:17,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:17,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078092831] [2021-11-07 01:55:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:17,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:17,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:17,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:17,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:55:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:55:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:18,435 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 01:55:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:18,600 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 01:55:18,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:18,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078092831] [2021-11-07 01:55:18,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078092831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:18,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:18,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:55:18,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372382005] [2021-11-07 01:55:18,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:55:18,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:18,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:55:18,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:55:18,603 INFO L87 Difference]: Start difference. First operand 818 states and 1391 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 01:55:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:18,934 INFO L93 Difference]: Finished difference Result 3180 states and 5430 transitions. [2021-11-07 01:55:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:18,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 01:55:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:18,949 INFO L225 Difference]: With dead ends: 3180 [2021-11-07 01:55:18,949 INFO L226 Difference]: Without dead ends: 2388 [2021-11-07 01:55:18,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:55:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-11-07 01:55:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 818. [2021-11-07 01:55:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 812 states have (on average 1.70935960591133) internal successors, (1388), 817 states have internal predecessors, (1388), 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 01:55:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1388 transitions. [2021-11-07 01:55:19,022 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1388 transitions. Word has length 55 [2021-11-07 01:55:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:19,023 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1388 transitions. [2021-11-07 01:55:19,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 01:55:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1388 transitions. [2021-11-07 01:55:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:55:19,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:19,025 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 01:55:19,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:19,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:19,239 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash -161952819, now seen corresponding path program 1 times [2021-11-07 01:55:19,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:19,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671659995] [2021-11-07 01:55:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:19,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:19,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:19,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:19,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:55:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:19,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:19,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:19,844 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 01:55:19,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:19,984 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 01:55:19,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:19,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671659995] [2021-11-07 01:55:19,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671659995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:19,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:19,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:55:19,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237502810] [2021-11-07 01:55:19,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:19,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:19,986 INFO L87 Difference]: Start difference. First operand 818 states and 1388 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 01:55:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:20,129 INFO L93 Difference]: Finished difference Result 2145 states and 3629 transitions. [2021-11-07 01:55:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 01:55:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:20,140 INFO L225 Difference]: With dead ends: 2145 [2021-11-07 01:55:20,140 INFO L226 Difference]: Without dead ends: 1610 [2021-11-07 01:55:20,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 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 01:55:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-11-07 01:55:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1075. [2021-11-07 01:55:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1069 states have (on average 1.7408793264733395) internal successors, (1861), 1074 states have internal predecessors, (1861), 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 01:55:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1861 transitions. [2021-11-07 01:55:20,230 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1861 transitions. Word has length 57 [2021-11-07 01:55:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:20,231 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1861 transitions. [2021-11-07 01:55:20,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 01:55:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1861 transitions. [2021-11-07 01:55:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:55:20,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:20,234 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 01:55:20,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:20,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:20,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1887196770, now seen corresponding path program 1 times [2021-11-07 01:55:20,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:20,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372329712] [2021-11-07 01:55:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:20,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:20,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:20,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:55:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:20,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:21,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:21,307 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 01:55:21,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:21,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372329712] [2021-11-07 01:55:21,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372329712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:21,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:21,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:21,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665666776] [2021-11-07 01:55:21,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:21,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:21,310 INFO L87 Difference]: Start difference. First operand 1075 states and 1861 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:21,483 INFO L93 Difference]: Finished difference Result 2806 states and 4849 transitions. [2021-11-07 01:55:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:21,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:55:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:21,495 INFO L225 Difference]: With dead ends: 2806 [2021-11-07 01:55:21,496 INFO L226 Difference]: Without dead ends: 1815 [2021-11-07 01:55:21,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:55:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-11-07 01:55:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1280. [2021-11-07 01:55:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1274 states have (on average 1.7558869701726845) internal successors, (2237), 1279 states have internal predecessors, (2237), 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 01:55:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 2237 transitions. [2021-11-07 01:55:21,646 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 2237 transitions. Word has length 69 [2021-11-07 01:55:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:21,646 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 2237 transitions. [2021-11-07 01:55:21,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 2237 transitions. [2021-11-07 01:55:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:55:21,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:21,650 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:21,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:21,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:21,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:21,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1909793341, now seen corresponding path program 1 times [2021-11-07 01:55:21,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:21,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121755570] [2021-11-07 01:55:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:21,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:21,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:21,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:21,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:55:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:22,483 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 01:55:22,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:22,653 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 01:55:22,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:22,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121755570] [2021-11-07 01:55:22,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121755570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:22,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:22,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:22,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006128736] [2021-11-07 01:55:22,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:22,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:22,656 INFO L87 Difference]: Start difference. First operand 1280 states and 2237 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:22,857 INFO L93 Difference]: Finished difference Result 3465 states and 6063 transitions. [2021-11-07 01:55:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:55:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:22,871 INFO L225 Difference]: With dead ends: 3465 [2021-11-07 01:55:22,872 INFO L226 Difference]: Without dead ends: 2273 [2021-11-07 01:55:22,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:55:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-11-07 01:55:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1738. [2021-11-07 01:55:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1732 states have (on average 1.7777136258660509) internal successors, (3079), 1737 states have internal predecessors, (3079), 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 01:55:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3079 transitions. [2021-11-07 01:55:23,015 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3079 transitions. Word has length 70 [2021-11-07 01:55:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:23,016 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 3079 transitions. [2021-11-07 01:55:23,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3079 transitions. [2021-11-07 01:55:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:55:23,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:23,020 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:23,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:23,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:23,239 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1059600685, now seen corresponding path program 1 times [2021-11-07 01:55:23,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:23,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067713907] [2021-11-07 01:55:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:23,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:23,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:23,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:23,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:55:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:23,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:23,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:24,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:24,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067713907] [2021-11-07 01:55:24,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067713907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:24,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:24,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:55:24,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010873540] [2021-11-07 01:55:24,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:24,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:24,088 INFO L87 Difference]: Start difference. First operand 1738 states and 3079 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 01:55:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:24,278 INFO L93 Difference]: Finished difference Result 3722 states and 6533 transitions. [2021-11-07 01:55:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:55:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:24,317 INFO L225 Difference]: With dead ends: 3722 [2021-11-07 01:55:24,317 INFO L226 Difference]: Without dead ends: 2273 [2021-11-07 01:55:24,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 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 01:55:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-11-07 01:55:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1738. [2021-11-07 01:55:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1732 states have (on average 1.7765588914549653) internal successors, (3077), 1737 states have internal predecessors, (3077), 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 01:55:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3077 transitions. [2021-11-07 01:55:24,460 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3077 transitions. Word has length 71 [2021-11-07 01:55:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:24,460 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 3077 transitions. [2021-11-07 01:55:24,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 01:55:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3077 transitions. [2021-11-07 01:55:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:55:24,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:24,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:24,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:24,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:24,680 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:24,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2130312012, now seen corresponding path program 1 times [2021-11-07 01:55:24,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:24,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339597659] [2021-11-07 01:55:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:24,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:24,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:24,681 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:24,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:55:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:25,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:25,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:25,344 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 01:55:25,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:25,513 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 01:55:25,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:25,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339597659] [2021-11-07 01:55:25,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339597659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:25,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:25,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:25,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110441780] [2021-11-07 01:55:25,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:25,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:25,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:25,515 INFO L87 Difference]: Start difference. First operand 1738 states and 3077 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:25,760 INFO L93 Difference]: Finished difference Result 4811 states and 8538 transitions. [2021-11-07 01:55:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:25,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:55:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:25,780 INFO L225 Difference]: With dead ends: 4811 [2021-11-07 01:55:25,780 INFO L226 Difference]: Without dead ends: 3169 [2021-11-07 01:55:25,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:55:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-11-07 01:55:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 2634. [2021-11-07 01:55:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2628 states have (on average 1.7975646879756468) internal successors, (4724), 2633 states have internal predecessors, (4724), 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 01:55:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 4724 transitions. [2021-11-07 01:55:25,993 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 4724 transitions. Word has length 71 [2021-11-07 01:55:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:25,994 INFO L470 AbstractCegarLoop]: Abstraction has 2634 states and 4724 transitions. [2021-11-07 01:55:25,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 4724 transitions. [2021-11-07 01:55:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:55:26,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:26,000 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:26,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:26,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:26,214 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash 614549375, now seen corresponding path program 1 times [2021-11-07 01:55:26,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:26,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347355632] [2021-11-07 01:55:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:26,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:26,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:26,217 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:26,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:55:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:26,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:26,947 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 01:55:26,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:27,134 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 01:55:27,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:27,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347355632] [2021-11-07 01:55:27,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347355632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:27,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:27,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:27,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215807959] [2021-11-07 01:55:27,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:27,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:27,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:27,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:27,136 INFO L87 Difference]: Start difference. First operand 2634 states and 4724 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:55:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:27,414 INFO L93 Difference]: Finished difference Result 7235 states and 12998 transitions. [2021-11-07 01:55:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 72 [2021-11-07 01:55:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:27,446 INFO L225 Difference]: With dead ends: 7235 [2021-11-07 01:55:27,446 INFO L226 Difference]: Without dead ends: 4731 [2021-11-07 01:55:27,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 01:55:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2021-11-07 01:55:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 4196. [2021-11-07 01:55:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4196 states, 4190 states have (on average 1.8121718377088305) internal successors, (7593), 4195 states have internal predecessors, (7593), 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 01:55:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 7593 transitions. [2021-11-07 01:55:27,752 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 7593 transitions. Word has length 72 [2021-11-07 01:55:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:27,754 INFO L470 AbstractCegarLoop]: Abstraction has 4196 states and 7593 transitions. [2021-11-07 01:55:27,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:55:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 7593 transitions. [2021-11-07 01:55:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:55:27,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:27,762 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:27,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:27,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:27,976 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash 261536541, now seen corresponding path program 1 times [2021-11-07 01:55:27,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:27,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732250630] [2021-11-07 01:55:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:27,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:27,978 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:27,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:55:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:28,696 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 01:55:28,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:28,866 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 01:55:28,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:28,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732250630] [2021-11-07 01:55:28,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732250630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:28,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:28,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:28,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621047127] [2021-11-07 01:55:28,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:28,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:28,869 INFO L87 Difference]: Start difference. First operand 4196 states and 7593 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:29,357 INFO L93 Difference]: Finished difference Result 11637 states and 21088 transitions. [2021-11-07 01:55:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:29,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:55:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:29,379 INFO L225 Difference]: With dead ends: 11637 [2021-11-07 01:55:29,380 INFO L226 Difference]: Without dead ends: 7605 [2021-11-07 01:55:29,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2021-11-07 01:55:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 7070. [2021-11-07 01:55:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7064 states have (on average 1.821347678369196) internal successors, (12866), 7069 states have internal predecessors, (12866), 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 01:55:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 12866 transitions. [2021-11-07 01:55:29,874 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 12866 transitions. Word has length 73 [2021-11-07 01:55:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:29,874 INFO L470 AbstractCegarLoop]: Abstraction has 7070 states and 12866 transitions. [2021-11-07 01:55:29,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 12866 transitions. [2021-11-07 01:55:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:55:29,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:29,883 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:29,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:30,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:30,099 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:30,099 INFO L85 PathProgramCache]: Analyzing trace with hash -652146815, now seen corresponding path program 1 times [2021-11-07 01:55:30,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:30,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017728001] [2021-11-07 01:55:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:30,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:30,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:30,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:30,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:55:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:30,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:30,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:55:30,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:55:31,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:31,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017728001] [2021-11-07 01:55:31,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017728001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:31,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:31,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:55:31,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474810284] [2021-11-07 01:55:31,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:55:31,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:31,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:55:31,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:55:31,091 INFO L87 Difference]: Start difference. First operand 7070 states and 12866 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 01:55:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:34,340 INFO L93 Difference]: Finished difference Result 26791 states and 48799 transitions. [2021-11-07 01:55:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:55:34,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 74 [2021-11-07 01:55:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:34,395 INFO L225 Difference]: With dead ends: 26791 [2021-11-07 01:55:34,395 INFO L226 Difference]: Without dead ends: 20008 [2021-11-07 01:55:34,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20008 states. [2021-11-07 01:55:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20008 to 7020. [2021-11-07 01:55:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7020 states, 7014 states have (on average 1.8058169375534645) internal successors, (12666), 7019 states have internal predecessors, (12666), 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 01:55:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7020 states to 7020 states and 12666 transitions. [2021-11-07 01:55:35,082 INFO L78 Accepts]: Start accepts. Automaton has 7020 states and 12666 transitions. Word has length 74 [2021-11-07 01:55:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:35,082 INFO L470 AbstractCegarLoop]: Abstraction has 7020 states and 12666 transitions. [2021-11-07 01:55:35,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 01:55:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 7020 states and 12666 transitions. [2021-11-07 01:55:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:55:35,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:35,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:35,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:35,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:35,307 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash -280781456, now seen corresponding path program 1 times [2021-11-07 01:55:35,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:35,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645839577] [2021-11-07 01:55:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:35,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:35,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:35,310 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:35,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:55:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:36,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:36,256 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 01:55:36,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:36,425 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 01:55:36,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:36,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645839577] [2021-11-07 01:55:36,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645839577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:36,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:36,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:36,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574512004] [2021-11-07 01:55:36,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:36,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:36,427 INFO L87 Difference]: Start difference. First operand 7020 states and 12666 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 01:55:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:37,011 INFO L93 Difference]: Finished difference Result 20438 states and 36930 transitions. [2021-11-07 01:55:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2021-11-07 01:55:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:37,049 INFO L225 Difference]: With dead ends: 20438 [2021-11-07 01:55:37,049 INFO L226 Difference]: Without dead ends: 13589 [2021-11-07 01:55:37,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 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 01:55:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13589 states. [2021-11-07 01:55:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13589 to 13054. [2021-11-07 01:55:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13054 states, 13048 states have (on average 1.810775597792765) internal successors, (23627), 13053 states have internal predecessors, (23627), 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 01:55:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13054 states to 13054 states and 23627 transitions. [2021-11-07 01:55:37,834 INFO L78 Accepts]: Start accepts. Automaton has 13054 states and 23627 transitions. Word has length 74 [2021-11-07 01:55:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:37,834 INFO L470 AbstractCegarLoop]: Abstraction has 13054 states and 23627 transitions. [2021-11-07 01:55:37,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 01:55:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 13054 states and 23627 transitions. [2021-11-07 01:55:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:55:37,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:37,845 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:37,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:38,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:38,065 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1141812156, now seen corresponding path program 1 times [2021-11-07 01:55:38,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:38,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035748782] [2021-11-07 01:55:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:38,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:38,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:38,067 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:38,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:55:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:38,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:38,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:39,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:39,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035748782] [2021-11-07 01:55:39,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035748782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:39,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [49021373] [2021-11-07 01:55:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:39,104 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:39,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:39,121 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:39,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:55:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:55:40,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:55:40,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [49021373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:40,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:40,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:55:40,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129917316] [2021-11-07 01:55:40,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:55:40,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:55:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:55:40,555 INFO L87 Difference]: Start difference. First operand 13054 states and 23627 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 01:55:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:46,343 INFO L93 Difference]: Finished difference Result 81146 states and 146823 transitions. [2021-11-07 01:55:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:55:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:55:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:46,484 INFO L225 Difference]: With dead ends: 81146 [2021-11-07 01:55:46,484 INFO L226 Difference]: Without dead ends: 80629 [2021-11-07 01:55:46,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:55:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80629 states. [2021-11-07 01:55:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80629 to 25857. [2021-11-07 01:55:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25857 states, 25851 states have (on average 1.8120769022474952) internal successors, (46844), 25856 states have internal predecessors, (46844), 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 01:55:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25857 states to 25857 states and 46844 transitions. [2021-11-07 01:55:48,926 INFO L78 Accepts]: Start accepts. Automaton has 25857 states and 46844 transitions. Word has length 75 [2021-11-07 01:55:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:48,927 INFO L470 AbstractCegarLoop]: Abstraction has 25857 states and 46844 transitions. [2021-11-07 01:55:48,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 01:55:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 25857 states and 46844 transitions. [2021-11-07 01:55:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:55:48,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:48,949 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:48,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:49,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:55:49,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:49,354 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1855381428, now seen corresponding path program 1 times [2021-11-07 01:55:49,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:49,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244130903] [2021-11-07 01:55:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:49,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:49,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:49,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:49,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:55:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:50,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:50,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:50,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:50,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244130903] [2021-11-07 01:55:50,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244130903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:50,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [65368390] [2021-11-07 01:55:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:50,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:50,494 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:50,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:55:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:55:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:55:51,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:55:51,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [65368390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:51,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:51,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:55:51,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921288950] [2021-11-07 01:55:51,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:55:51,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:51,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:55:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:55:51,904 INFO L87 Difference]: Start difference. First operand 25857 states and 46844 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:55,097 INFO L93 Difference]: Finished difference Result 26897 states and 48566 transitions. [2021-11-07 01:55:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:55:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:55:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:55,131 INFO L225 Difference]: With dead ends: 26897 [2021-11-07 01:55:55,131 INFO L226 Difference]: Without dead ends: 26086 [2021-11-07 01:55:55,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:55:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26086 states. [2021-11-07 01:55:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26086 to 25851. [2021-11-07 01:55:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25851 states, 25845 states have (on average 1.811994583091507) internal successors, (46831), 25850 states have internal predecessors, (46831), 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 01:55:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25851 states to 25851 states and 46831 transitions. [2021-11-07 01:55:56,756 INFO L78 Accepts]: Start accepts. Automaton has 25851 states and 46831 transitions. Word has length 76 [2021-11-07 01:55:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:56,757 INFO L470 AbstractCegarLoop]: Abstraction has 25851 states and 46831 transitions. [2021-11-07 01:55:56,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 25851 states and 46831 transitions. [2021-11-07 01:55:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:55:56,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:56,778 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:56,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:56,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:57,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:57,184 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -894170769, now seen corresponding path program 1 times [2021-11-07 01:55:57,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:57,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662292759] [2021-11-07 01:55:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:57,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:57,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:57,186 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:57,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:55:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:55:57,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:55:58,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:55:58,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:58,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662292759] [2021-11-07 01:55:58,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662292759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:58,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:58,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:55:58,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453557794] [2021-11-07 01:55:58,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:58,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:58,293 INFO L87 Difference]: Start difference. First operand 25851 states and 46831 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:59,638 INFO L93 Difference]: Finished difference Result 50895 states and 92403 transitions. [2021-11-07 01:55:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:55:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:59,671 INFO L225 Difference]: With dead ends: 50895 [2021-11-07 01:55:59,671 INFO L226 Difference]: Without dead ends: 25334 [2021-11-07 01:55:59,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 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 01:55:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25334 states. [2021-11-07 01:56:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25334 to 13052. [2021-11-07 01:56:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13046 states have (on average 1.8103633297562471) internal successors, (23618), 13051 states have internal predecessors, (23618), 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 01:56:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 23618 transitions. [2021-11-07 01:56:00,572 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 23618 transitions. Word has length 76 [2021-11-07 01:56:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:00,572 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 23618 transitions. [2021-11-07 01:56:00,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 23618 transitions. [2021-11-07 01:56:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:56:00,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:00,579 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:00,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:00,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:00,792 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -864024166, now seen corresponding path program 1 times [2021-11-07 01:56:00,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:00,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351020220] [2021-11-07 01:56:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:00,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:00,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:00,794 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:00,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:56:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:01,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:01,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:01,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351020220] [2021-11-07 01:56:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351020220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:01,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1296325776] [2021-11-07 01:56:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:01,948 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:01,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:01,949 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:01,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:56:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:02,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:03,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:03,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1296325776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:03,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:03,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 01:56:03,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695301240] [2021-11-07 01:56:03,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:56:03,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:03,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:56:03,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:56:03,312 INFO L87 Difference]: Start difference. First operand 13052 states and 23618 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 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 01:56:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:04,175 INFO L93 Difference]: Finished difference Result 13465 states and 24287 transitions. [2021-11-07 01:56:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:56:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 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 78 [2021-11-07 01:56:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:04,194 INFO L225 Difference]: With dead ends: 13465 [2021-11-07 01:56:04,194 INFO L226 Difference]: Without dead ends: 13052 [2021-11-07 01:56:04,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:56:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13052 states. [2021-11-07 01:56:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13052 to 13052. [2021-11-07 01:56:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13046 states have (on average 1.80990341867239) internal successors, (23612), 13051 states have internal predecessors, (23612), 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 01:56:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 23612 transitions. [2021-11-07 01:56:05,059 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 23612 transitions. Word has length 78 [2021-11-07 01:56:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:05,059 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 23612 transitions. [2021-11-07 01:56:05,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 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 01:56:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 23612 transitions. [2021-11-07 01:56:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:56:05,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:05,066 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:05,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:05,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:05,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:05,467 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1504882229, now seen corresponding path program 1 times [2021-11-07 01:56:05,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:05,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084715388] [2021-11-07 01:56:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:05,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:05,469 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:05,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:56:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:06,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:06,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:06,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:06,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084715388] [2021-11-07 01:56:06,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084715388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:06,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1788888583] [2021-11-07 01:56:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:06,681 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:06,682 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:06,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:56:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:07,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:56:07,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:08,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:08,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1788888583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:08,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:08,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:56:08,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391531938] [2021-11-07 01:56:08,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:56:08,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:56:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:56:08,325 INFO L87 Difference]: Start difference. First operand 13052 states and 23612 transitions. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 01:56:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:11,811 INFO L93 Difference]: Finished difference Result 15489 states and 27545 transitions. [2021-11-07 01:56:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:56:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 81 [2021-11-07 01:56:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:11,830 INFO L225 Difference]: With dead ends: 15489 [2021-11-07 01:56:11,830 INFO L226 Difference]: Without dead ends: 15076 [2021-11-07 01:56:11,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:56:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15076 states. [2021-11-07 01:56:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15076 to 13496. [2021-11-07 01:56:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13496 states, 13490 states have (on average 1.8044477390659748) internal successors, (24342), 13495 states have internal predecessors, (24342), 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 01:56:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13496 states to 13496 states and 24342 transitions. [2021-11-07 01:56:12,716 INFO L78 Accepts]: Start accepts. Automaton has 13496 states and 24342 transitions. Word has length 81 [2021-11-07 01:56:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:12,717 INFO L470 AbstractCegarLoop]: Abstraction has 13496 states and 24342 transitions. [2021-11-07 01:56:12,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 01:56:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 13496 states and 24342 transitions. [2021-11-07 01:56:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:56:12,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:12,726 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:12,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:12,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:13,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:13,128 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2052485202, now seen corresponding path program 1 times [2021-11-07 01:56:13,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:13,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009728891] [2021-11-07 01:56:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:13,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:13,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:13,130 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:13,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:56:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:14,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:14,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:14,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:14,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:14,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009728891] [2021-11-07 01:56:14,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009728891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:14,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1942987696] [2021-11-07 01:56:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:14,482 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:14,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:14,482 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:14,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:56:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:56:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:16,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:16,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1942987696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:16,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:16,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-07 01:56:16,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087937069] [2021-11-07 01:56:16,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:56:16,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:56:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:56:16,203 INFO L87 Difference]: Start difference. First operand 13496 states and 24342 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 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 01:56:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:17,424 INFO L93 Difference]: Finished difference Result 14838 states and 26529 transitions. [2021-11-07 01:56:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:56:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 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 82 [2021-11-07 01:56:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:17,443 INFO L225 Difference]: With dead ends: 14838 [2021-11-07 01:56:17,443 INFO L226 Difference]: Without dead ends: 13986 [2021-11-07 01:56:17,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:56:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13986 states. [2021-11-07 01:56:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13986 to 13484. [2021-11-07 01:56:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13484 states, 13478 states have (on average 1.8040510461492802) internal successors, (24315), 13483 states have internal predecessors, (24315), 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 01:56:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13484 states to 13484 states and 24315 transitions. [2021-11-07 01:56:18,393 INFO L78 Accepts]: Start accepts. Automaton has 13484 states and 24315 transitions. Word has length 82 [2021-11-07 01:56:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:18,393 INFO L470 AbstractCegarLoop]: Abstraction has 13484 states and 24315 transitions. [2021-11-07 01:56:18,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 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 01:56:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 13484 states and 24315 transitions. [2021-11-07 01:56:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:56:18,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:18,403 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:18,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:18,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:18,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:18,803 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash 28964555, now seen corresponding path program 1 times [2021-11-07 01:56:18,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:18,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904494334] [2021-11-07 01:56:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:18,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:18,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:18,805 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:18,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:56:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:19,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:20,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:20,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:20,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904494334] [2021-11-07 01:56:20,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904494334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:20,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1154468407] [2021-11-07 01:56:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:20,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:20,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:20,236 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:20,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:56:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:21,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:56:21,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:21,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:22,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1154468407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:22,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:22,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:56:22,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100462436] [2021-11-07 01:56:22,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:56:22,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:56:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:56:22,026 INFO L87 Difference]: Start difference. First operand 13484 states and 24315 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 01:56:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:22,831 INFO L93 Difference]: Finished difference Result 13964 states and 25090 transitions. [2021-11-07 01:56:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:56:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 82 [2021-11-07 01:56:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:22,847 INFO L225 Difference]: With dead ends: 13964 [2021-11-07 01:56:22,847 INFO L226 Difference]: Without dead ends: 13291 [2021-11-07 01:56:22,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:56:22,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13291 states. [2021-11-07 01:56:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13291 to 13054. [2021-11-07 01:56:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13054 states, 13048 states have (on average 1.8089362354383813) internal successors, (23603), 13053 states have internal predecessors, (23603), 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 01:56:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13054 states to 13054 states and 23603 transitions. [2021-11-07 01:56:23,448 INFO L78 Accepts]: Start accepts. Automaton has 13054 states and 23603 transitions. Word has length 82 [2021-11-07 01:56:23,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:23,448 INFO L470 AbstractCegarLoop]: Abstraction has 13054 states and 23603 transitions. [2021-11-07 01:56:23,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 01:56:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 13054 states and 23603 transitions. [2021-11-07 01:56:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:56:23,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:23,459 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:23,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:23,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:23,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:23,860 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash -466186735, now seen corresponding path program 1 times [2021-11-07 01:56:23,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:23,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684854776] [2021-11-07 01:56:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:23,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:23,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:23,862 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:23,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:56:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:25,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:25,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:25,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684854776] [2021-11-07 01:56:25,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684854776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:25,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [402650177] [2021-11-07 01:56:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:25,320 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:25,321 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:25,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:56:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:56:26,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:27,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:27,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [402650177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:27,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:27,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-07 01:56:27,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157180427] [2021-11-07 01:56:27,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:56:27,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:56:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:56:27,435 INFO L87 Difference]: Start difference. First operand 13054 states and 23603 transitions. Second operand has 16 states, 16 states have (on average 8.9375) internal successors, (143), 16 states have internal predecessors, (143), 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 01:56:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:39,372 INFO L93 Difference]: Finished difference Result 26565 states and 45058 transitions. [2021-11-07 01:56:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-07 01:56:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.9375) internal successors, (143), 16 states have internal predecessors, (143), 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 88 [2021-11-07 01:56:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:39,404 INFO L225 Difference]: With dead ends: 26565 [2021-11-07 01:56:39,404 INFO L226 Difference]: Without dead ends: 26115 [2021-11-07 01:56:39,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4605 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2886, Invalid=11634, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 01:56:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26115 states. [2021-11-07 01:56:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26115 to 14065. [2021-11-07 01:56:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14065 states, 14059 states have (on average 1.7901699978661356) internal successors, (25168), 14064 states have internal predecessors, (25168), 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 01:56:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14065 states to 14065 states and 25168 transitions. [2021-11-07 01:56:40,297 INFO L78 Accepts]: Start accepts. Automaton has 14065 states and 25168 transitions. Word has length 88 [2021-11-07 01:56:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:40,297 INFO L470 AbstractCegarLoop]: Abstraction has 14065 states and 25168 transitions. [2021-11-07 01:56:40,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.9375) internal successors, (143), 16 states have internal predecessors, (143), 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 01:56:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 14065 states and 25168 transitions. [2021-11-07 01:56:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:56:40,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:40,305 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:40,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:40,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 01:56:40,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:40,706 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash 559306647, now seen corresponding path program 1 times [2021-11-07 01:56:40,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:40,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653137821] [2021-11-07 01:56:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:40,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:40,708 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:40,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:56:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:41,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:41,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:42,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:42,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:42,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653137821] [2021-11-07 01:56:42,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653137821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:42,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [540058435] [2021-11-07 01:56:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:42,321 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:42,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:42,330 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:42,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:56:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:56:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:44,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:56:45,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [540058435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:45,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:45,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:56:45,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489621655] [2021-11-07 01:56:45,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:56:45,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:56:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:56:45,076 INFO L87 Difference]: Start difference. First operand 14065 states and 25168 transitions. Second operand has 18 states, 18 states have (on average 8.555555555555555) internal successors, (154), 17 states have internal predecessors, (154), 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 01:57:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:13,341 INFO L93 Difference]: Finished difference Result 62337 states and 106412 transitions. [2021-11-07 01:57:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 01:57:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.555555555555555) internal successors, (154), 17 states have internal predecessors, (154), 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 89 [2021-11-07 01:57:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:13,424 INFO L225 Difference]: With dead ends: 62337 [2021-11-07 01:57:13,424 INFO L226 Difference]: Without dead ends: 61085 [2021-11-07 01:57:13,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1088, Invalid=3882, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 01:57:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61085 states. [2021-11-07 01:57:15,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61085 to 29419. [2021-11-07 01:57:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29419 states, 29413 states have (on average 1.779553258763132) internal successors, (52342), 29418 states have internal predecessors, (52342), 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 01:57:15,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29419 states to 29419 states and 52342 transitions. [2021-11-07 01:57:15,724 INFO L78 Accepts]: Start accepts. Automaton has 29419 states and 52342 transitions. Word has length 89 [2021-11-07 01:57:15,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:15,724 INFO L470 AbstractCegarLoop]: Abstraction has 29419 states and 52342 transitions. [2021-11-07 01:57:15,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.555555555555555) internal successors, (154), 17 states have internal predecessors, (154), 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 01:57:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 29419 states and 52342 transitions. [2021-11-07 01:57:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:57:15,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:15,740 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:15,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:15,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:16,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:16,141 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:57:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1533099201, now seen corresponding path program 1 times [2021-11-07 01:57:16,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:16,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315759791] [2021-11-07 01:57:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:16,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:16,143 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:16,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:57:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:17,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:17,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:17,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:17,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:17,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315759791] [2021-11-07 01:57:17,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315759791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:17,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1484160514] [2021-11-07 01:57:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:17,827 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:17,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:17,828 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:17,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:57:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:57:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:57:19,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:57:19,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1484160514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:19,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:19,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:57:19,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388602076] [2021-11-07 01:57:19,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:19,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:57:19,913 INFO L87 Difference]: Start difference. First operand 29419 states and 52342 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 01:57:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:22,748 INFO L93 Difference]: Finished difference Result 35199 states and 61558 transitions. [2021-11-07 01:57:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:57:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 89 [2021-11-07 01:57:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:22,790 INFO L225 Difference]: With dead ends: 35199 [2021-11-07 01:57:22,791 INFO L226 Difference]: Without dead ends: 30965 [2021-11-07 01:57:22,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:57:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30965 states. [2021-11-07 01:57:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30965 to 28931. [2021-11-07 01:57:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28931 states, 28925 states have (on average 1.7850648228176318) internal successors, (51633), 28930 states have internal predecessors, (51633), 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 01:57:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28931 states to 28931 states and 51633 transitions. [2021-11-07 01:57:25,036 INFO L78 Accepts]: Start accepts. Automaton has 28931 states and 51633 transitions. Word has length 89 [2021-11-07 01:57:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:25,037 INFO L470 AbstractCegarLoop]: Abstraction has 28931 states and 51633 transitions. [2021-11-07 01:57:25,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 01:57:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 28931 states and 51633 transitions. [2021-11-07 01:57:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:57:25,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:25,052 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:25,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:25,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-07 01:57:25,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:25,453 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:57:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 80875798, now seen corresponding path program 1 times [2021-11-07 01:57:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:25,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201965439] [2021-11-07 01:57:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:25,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:25,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:25,454 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:25,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:57:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:26,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:26,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:26,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:27,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:27,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201965439] [2021-11-07 01:57:27,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201965439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:27,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [178337925] [2021-11-07 01:57:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:27,158 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:27,184 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:27,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:57:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:28,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:57:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:57:29,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:57:29,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [178337925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:29,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:29,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 24 [2021-11-07 01:57:29,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137407635] [2021-11-07 01:57:29,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:57:29,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:57:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:57:29,805 INFO L87 Difference]: Start difference. First operand 28931 states and 51633 transitions. Second operand has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 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 01:57:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:46,034 INFO L93 Difference]: Finished difference Result 49614 states and 84676 transitions. [2021-11-07 01:57:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-07 01:57:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 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 90 [2021-11-07 01:57:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:46,088 INFO L225 Difference]: With dead ends: 49614 [2021-11-07 01:57:46,088 INFO L226 Difference]: Without dead ends: 46468 [2021-11-07 01:57:46,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3157, Invalid=12593, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 01:57:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46468 states. [2021-11-07 01:57:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46468 to 29240. [2021-11-07 01:57:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29240 states, 29234 states have (on average 1.7826845453923514) internal successors, (52115), 29239 states have internal predecessors, (52115), 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 01:57:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29240 states to 29240 states and 52115 transitions. [2021-11-07 01:57:48,596 INFO L78 Accepts]: Start accepts. Automaton has 29240 states and 52115 transitions. Word has length 90 [2021-11-07 01:57:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:48,596 INFO L470 AbstractCegarLoop]: Abstraction has 29240 states and 52115 transitions. [2021-11-07 01:57:48,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 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 01:57:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 29240 states and 52115 transitions. [2021-11-07 01:57:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:57:48,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:48,619 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:48,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:48,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:49,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:49,036 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:57:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088637, now seen corresponding path program 1 times [2021-11-07 01:57:49,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:49,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57309536] [2021-11-07 01:57:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:49,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:49,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:49,038 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:49,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:57:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:50,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:50,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:50,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:50,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57309536] [2021-11-07 01:57:50,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57309536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:50,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531155910] [2021-11-07 01:57:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:50,865 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:50,866 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 01:57:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:52,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:57:52,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:57:53,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:57:53,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531155910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:53,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:53,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:57:53,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828535135] [2021-11-07 01:57:53,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:57:53,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:57:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:57:53,268 INFO L87 Difference]: Start difference. First operand 29240 states and 52115 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 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 01:57:58,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:58,915 INFO L93 Difference]: Finished difference Result 68230 states and 119995 transitions. [2021-11-07 01:57:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:57:58,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 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 91 [2021-11-07 01:57:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:59,000 INFO L225 Difference]: With dead ends: 68230 [2021-11-07 01:57:59,001 INFO L226 Difference]: Without dead ends: 64602 [2021-11-07 01:57:59,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:57:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64602 states. [2021-11-07 01:58:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64602 to 57630. [2021-11-07 01:58:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57630 states, 57624 states have (on average 1.7836318200749688) internal successors, (102780), 57629 states have internal predecessors, (102780), 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 01:58:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57630 states to 57630 states and 102780 transitions. [2021-11-07 01:58:04,236 INFO L78 Accepts]: Start accepts. Automaton has 57630 states and 102780 transitions. Word has length 91 [2021-11-07 01:58:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:04,237 INFO L470 AbstractCegarLoop]: Abstraction has 57630 states and 102780 transitions. [2021-11-07 01:58:04,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 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 01:58:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 57630 states and 102780 transitions. [2021-11-07 01:58:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:58:04,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:04,294 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:04,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-07 01:58:04,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-07 01:58:04,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:04,702 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1029196211, now seen corresponding path program 1 times [2021-11-07 01:58:04,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:04,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769420291] [2021-11-07 01:58:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:04,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:04,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:04,704 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:04,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:58:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:06,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:06,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:06,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769420291] [2021-11-07 01:58:06,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769420291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:06,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107942603] [2021-11-07 01:58:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:06,582 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:06,582 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:06,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2538214-d246-46bb-9484-181cef6b7e61/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 01:58:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:08,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:08,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:58:08,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:58:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107942603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:09,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:09,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:58:09,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826129056] [2021-11-07 01:58:09,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:09,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:58:09,087 INFO L87 Difference]: Start difference. First operand 57630 states and 102780 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 01:58:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:13,610 INFO L93 Difference]: Finished difference Result 62891 states and 111139 transitions. [2021-11-07 01:58:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 92 [2021-11-07 01:58:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:13,700 INFO L225 Difference]: With dead ends: 62891 [2021-11-07 01:58:13,700 INFO L226 Difference]: Without dead ends: 57409 [2021-11-07 01:58:13,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:58:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57409 states.