./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/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_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/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_86fc6871-8dbd-4062-990d-6d7d1691558f/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 c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:43:54,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:43:54,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:43:54,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:43:54,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:43:54,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:43:54,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:43:54,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:43:54,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:43:54,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:43:54,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:43:54,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:43:54,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:43:54,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:43:54,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:43:54,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:43:54,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:43:54,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:43:54,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:43:54,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:43:54,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:43:54,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:43:54,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:43:54,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:43:54,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:43:54,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:43:54,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:43:54,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:43:54,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:43:54,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:43:54,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:43:54,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:43:54,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:43:54,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:43:54,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:43:54,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:43:54,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:43:54,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:43:54,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:43:54,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:43:54,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:43:54,833 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:43:54,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:43:54,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:43:54,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:43:54,871 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:43:54,871 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:43:54,872 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:43:54,872 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:43:54,872 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:43:54,873 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:43:54,873 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:43:54,873 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:43:54,874 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:43:54,874 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:43:54,874 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:43:54,875 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:43:54,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:43:54,876 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:43:54,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:43:54,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:43:54,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:43:54,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:43:54,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:43:54,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:43:54,878 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:43:54,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:43:54,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:43:54,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:43:54,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:43:54,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:43:54,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:43:54,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:54,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:43:54,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:43:54,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:43:54,882 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:43:54,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:43:54,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:43:54,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:43:54,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:43:54,886 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_86fc6871-8dbd-4062-990d-6d7d1691558f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2021-11-07 01:43:55,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:43:55,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:43:55,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:43:55,276 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:43:55,277 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:43:55,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-07 01:43:55,398 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data/06e696ebd/2c2bda2e287140438c66f1f079e73bd3/FLAGfc978c719 [2021-11-07 01:43:56,322 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:43:56,327 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-07 01:43:56,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data/06e696ebd/2c2bda2e287140438c66f1f079e73bd3/FLAGfc978c719 [2021-11-07 01:43:56,386 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data/06e696ebd/2c2bda2e287140438c66f1f079e73bd3 [2021-11-07 01:43:56,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:43:56,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:43:56,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:56,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:43:56,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:43:56,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:56" (1/1) ... [2021-11-07 01:43:56,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a3b3c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:56, skipping insertion in model container [2021-11-07 01:43:56,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:56" (1/1) ... [2021-11-07 01:43:56,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:43:56,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:43:57,360 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_86fc6871-8dbd-4062-990d-6d7d1691558f/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-07 01:43:57,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:57,396 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 01:43:57,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b4c7d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:57, skipping insertion in model container [2021-11-07 01:43:57,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:57,398 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:43:57,402 INFO L168 Benchmark]: Toolchain (without parser) took 1005.54 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 50.1 MB in the beginning and 69.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:43:57,403 INFO L168 Benchmark]: CDTParser took 1.23 ms. Allocated memory is still 88.1 MB. Free memory was 58.0 MB in the beginning and 58.0 MB in the end (delta: 25.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:43:57,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1000.79 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 49.8 MB in the beginning and 69.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:43:57,407 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.23 ms. Allocated memory is still 88.1 MB. Free memory was 58.0 MB in the beginning and 58.0 MB in the end (delta: 25.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1000.79 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 49.8 MB in the beginning and 69.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2099]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/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_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/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_86fc6871-8dbd-4062-990d-6d7d1691558f/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 c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:00,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:00,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:00,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:00,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:00,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:00,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:00,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:00,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:00,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:00,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:00,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:00,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:00,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:00,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:00,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:00,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:00,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:00,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:00,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:00,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:00,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:00,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:00,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:00,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:00,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:00,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:00,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:00,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:00,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:00,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:00,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:00,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:00,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:00,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:00,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:00,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:00,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:00,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:00,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:00,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:00,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:44:00,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:00,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:00,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:00,736 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:00,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:00,737 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:00,737 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:00,738 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:00,738 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:00,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:00,740 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:00,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:00,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:00,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:00,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:00,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:00,742 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:00,742 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:44:00,743 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:44:00,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:00,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:00,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:00,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:00,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:00,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:44:00,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:00,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:00,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:00,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:00,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:00,747 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:44:00,748 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:00,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:00,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:00,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:00,749 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_86fc6871-8dbd-4062-990d-6d7d1691558f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2021-11-07 01:44:01,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:01,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:01,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:01,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:01,432 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:01,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-07 01:44:01,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data/e5bfff3f8/db7f7137f1eb4eb9b76e775de0a84aed/FLAG54640e879 [2021-11-07 01:44:02,750 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:02,751 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-07 01:44:02,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data/e5bfff3f8/db7f7137f1eb4eb9b76e775de0a84aed/FLAG54640e879 [2021-11-07 01:44:03,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/data/e5bfff3f8/db7f7137f1eb4eb9b76e775de0a84aed [2021-11-07 01:44:03,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:03,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:03,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:03,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:03,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:03,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:03,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187d0fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03, skipping insertion in model container [2021-11-07 01:44:03,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:03,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:03,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:04,170 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_86fc6871-8dbd-4062-990d-6d7d1691558f/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-07 01:44:04,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:04,218 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:44:04,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:04,448 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_86fc6871-8dbd-4062-990d-6d7d1691558f/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-07 01:44:04,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:04,460 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:04,570 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_86fc6871-8dbd-4062-990d-6d7d1691558f/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-07 01:44:04,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:04,635 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:04,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04 WrapperNode [2021-11-07 01:44:04,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:04,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:04,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:04,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:04,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:04,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:05,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:05,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:05,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:05,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:05,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:05,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:05,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:05,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:05,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:06,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:06,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:06,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:06,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:06,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:06,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:06,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (1/1) ... [2021-11-07 01:44:06,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:06,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:06,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:06,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:44:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:22,053 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:22,054 INFO L299 CfgBuilder]: Removed 1125 assume(true) statements. [2021-11-07 01:44:22,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:22 BoogieIcfgContainer [2021-11-07 01:44:22,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:22,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:22,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:22,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:22,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:03" (1/3) ... [2021-11-07 01:44:22,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387184b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:22, skipping insertion in model container [2021-11-07 01:44:22,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:04" (2/3) ... [2021-11-07 01:44:22,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387184b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:22, skipping insertion in model container [2021-11-07 01:44:22,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:22" (3/3) ... [2021-11-07 01:44:22,079 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2021-11-07 01:44:22,087 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:22,087 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:44:22,203 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:22,214 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 01:44:22,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:44:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 4860 states, 4854 states have (on average 1.8939019365471776) internal successors, (9193), 4859 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:44:22,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:22,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:22,481 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1694776345, now seen corresponding path program 1 times [2021-11-07 01:44:22,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:22,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074396280] [2021-11-07 01:44:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:22,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:22,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:22,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:22,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:44:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:44:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:23,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:23,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:23,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074396280] [2021-11-07 01:44:23,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074396280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:23,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:23,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:44:23,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228053037] [2021-11-07 01:44:23,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:44:23,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:44:23,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:23,266 INFO L87 Difference]: Start difference. First operand has 4860 states, 4854 states have (on average 1.8939019365471776) internal successors, (9193), 4859 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:23,527 INFO L93 Difference]: Finished difference Result 4879 states and 9216 transitions. [2021-11-07 01:44:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:44:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:44:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:23,593 INFO L225 Difference]: With dead ends: 4879 [2021-11-07 01:44:23,594 INFO L226 Difference]: Without dead ends: 4856 [2021-11-07 01:44:23,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-07 01:44:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-07 01:44:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4851 states have (on average 1.8925994640280355) internal successors, (9181), 4855 states have internal predecessors, (9181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9181 transitions. [2021-11-07 01:44:23,910 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9181 transitions. Word has length 27 [2021-11-07 01:44:23,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:23,911 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 9181 transitions. [2021-11-07 01:44:23,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9181 transitions. [2021-11-07 01:44:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:44:23,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:23,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:23,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:24,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:24,138 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:24,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1628752113, now seen corresponding path program 1 times [2021-11-07 01:44:24,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:24,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787868402] [2021-11-07 01:44:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:24,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:24,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:24,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:44:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:24,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:24,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:24,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:24,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:24,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787868402] [2021-11-07 01:44:24,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787868402] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:24,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:24,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:24,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192109024] [2021-11-07 01:44:24,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:24,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:24,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:24,813 INFO L87 Difference]: Start difference. First operand 4856 states and 9181 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:25,209 INFO L93 Difference]: Finished difference Result 9699 states and 18343 transitions. [2021-11-07 01:44:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:25,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 01:44:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:25,251 INFO L225 Difference]: With dead ends: 9699 [2021-11-07 01:44:25,251 INFO L226 Difference]: Without dead ends: 4856 [2021-11-07 01:44:25,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-07 01:44:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-07 01:44:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4851 states have (on average 1.89136260564832) internal successors, (9175), 4855 states have internal predecessors, (9175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9175 transitions. [2021-11-07 01:44:25,509 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9175 transitions. Word has length 29 [2021-11-07 01:44:25,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:25,511 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 9175 transitions. [2021-11-07 01:44:25,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9175 transitions. [2021-11-07 01:44:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:44:25,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:25,522 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:25,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:25,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:25,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:25,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1747198523, now seen corresponding path program 1 times [2021-11-07 01:44:25,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:25,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023816261] [2021-11-07 01:44:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:25,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:25,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:25,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:25,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:44:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:26,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:26,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:26,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:26,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:26,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023816261] [2021-11-07 01:44:26,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023816261] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:26,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:26,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:26,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504424819] [2021-11-07 01:44:26,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:26,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:26,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:26,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:26,463 INFO L87 Difference]: Start difference. First operand 4856 states and 9175 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:27,170 INFO L93 Difference]: Finished difference Result 9663 states and 18266 transitions. [2021-11-07 01:44:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:44:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:27,210 INFO L225 Difference]: With dead ends: 9663 [2021-11-07 01:44:27,210 INFO L226 Difference]: Without dead ends: 4829 [2021-11-07 01:44:27,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:44:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-07 01:44:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-07 01:44:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4824 states have (on average 1.890339966832504) internal successors, (9119), 4828 states have internal predecessors, (9119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9119 transitions. [2021-11-07 01:44:27,447 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9119 transitions. Word has length 34 [2021-11-07 01:44:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:27,448 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 9119 transitions. [2021-11-07 01:44:27,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9119 transitions. [2021-11-07 01:44:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:44:27,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:27,451 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:27,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:27,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:27,668 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash -706375709, now seen corresponding path program 1 times [2021-11-07 01:44:27,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:27,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657340134] [2021-11-07 01:44:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:27,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:27,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:27,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:27,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:44:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:28,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:28,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:28,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657340134] [2021-11-07 01:44:28,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657340134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:28,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:28,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:28,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384725374] [2021-11-07 01:44:28,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:28,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:28,362 INFO L87 Difference]: Start difference. First operand 4829 states and 9119 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:28,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:28,700 INFO L93 Difference]: Finished difference Result 9636 states and 18210 transitions. [2021-11-07 01:44:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:28,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:44:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:28,741 INFO L225 Difference]: With dead ends: 9636 [2021-11-07 01:44:28,741 INFO L226 Difference]: Without dead ends: 4829 [2021-11-07 01:44:28,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-07 01:44:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-07 01:44:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4824 states have (on average 1.8890961857379769) internal successors, (9113), 4828 states have internal predecessors, (9113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9113 transitions. [2021-11-07 01:44:29,006 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9113 transitions. Word has length 35 [2021-11-07 01:44:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:29,007 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 9113 transitions. [2021-11-07 01:44:29,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9113 transitions. [2021-11-07 01:44:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:44:29,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:29,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:29,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:29,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:29,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash -891560782, now seen corresponding path program 1 times [2021-11-07 01:44:29,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:29,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596615084] [2021-11-07 01:44:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:29,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:29,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:29,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:29,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:44:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:29,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:29,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:29,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:30,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:30,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596615084] [2021-11-07 01:44:30,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596615084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:30,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:30,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:44:30,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074761471] [2021-11-07 01:44:30,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:30,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:30,082 INFO L87 Difference]: Start difference. First operand 4829 states and 9113 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:30,641 INFO L93 Difference]: Finished difference Result 9630 states and 18193 transitions. [2021-11-07 01:44:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:44:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:44:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:30,696 INFO L225 Difference]: With dead ends: 9630 [2021-11-07 01:44:30,696 INFO L226 Difference]: Without dead ends: 4826 [2021-11-07 01:44:30,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-07 01:44:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-11-07 01:44:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4821 states have (on average 1.8886123210952084) internal successors, (9105), 4825 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 9105 transitions. [2021-11-07 01:44:30,971 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 9105 transitions. Word has length 40 [2021-11-07 01:44:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:30,972 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 9105 transitions. [2021-11-07 01:44:30,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 9105 transitions. [2021-11-07 01:44:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:44:30,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:30,974 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:30,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:31,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:31,197 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1789484258, now seen corresponding path program 1 times [2021-11-07 01:44:31,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:31,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778394340] [2021-11-07 01:44:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:31,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:31,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:31,203 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:31,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:44:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:31,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:32,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:32,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:32,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778394340] [2021-11-07 01:44:32,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778394340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:32,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:32,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:44:32,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126995324] [2021-11-07 01:44:32,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:32,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:32,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:32,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:32,308 INFO L87 Difference]: Start difference. First operand 4826 states and 9105 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:33,131 INFO L93 Difference]: Finished difference Result 13250 states and 25057 transitions. [2021-11-07 01:44:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 01:44:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:33,169 INFO L225 Difference]: With dead ends: 13250 [2021-11-07 01:44:33,169 INFO L226 Difference]: Without dead ends: 10795 [2021-11-07 01:44:33,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-11-07 01:44:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 6386. [2021-11-07 01:44:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6381 states have (on average 1.8901426108760382) internal successors, (12061), 6385 states have internal predecessors, (12061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 12061 transitions. [2021-11-07 01:44:33,689 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 12061 transitions. Word has length 41 [2021-11-07 01:44:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:33,690 INFO L470 AbstractCegarLoop]: Abstraction has 6386 states and 12061 transitions. [2021-11-07 01:44:33,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 12061 transitions. [2021-11-07 01:44:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:44:33,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:33,696 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 01:44:33,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:33,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:33,913 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1006597301, now seen corresponding path program 1 times [2021-11-07 01:44:33,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:33,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023110719] [2021-11-07 01:44:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:33,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:33,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:33,919 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:33,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:44:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:34,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:34,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:34,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:34,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023110719] [2021-11-07 01:44:34,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023110719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:34,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:34,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:44:34,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609300665] [2021-11-07 01:44:34,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:34,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:34,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:34,976 INFO L87 Difference]: Start difference. First operand 6386 states and 12061 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:36,009 INFO L93 Difference]: Finished difference Result 12204 states and 22830 transitions. [2021-11-07 01:44:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:44:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:44:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:36,036 INFO L225 Difference]: With dead ends: 12204 [2021-11-07 01:44:36,036 INFO L226 Difference]: Without dead ends: 7037 [2021-11-07 01:44:36,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:44:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7037 states. [2021-11-07 01:44:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7037 to 4741. [2021-11-07 01:44:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4736 states have (on average 1.8817567567567568) internal successors, (8912), 4740 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 8912 transitions. [2021-11-07 01:44:36,471 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 8912 transitions. Word has length 54 [2021-11-07 01:44:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:36,471 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 8912 transitions. [2021-11-07 01:44:36,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 8912 transitions. [2021-11-07 01:44:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:44:36,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:36,476 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 01:44:36,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:36,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:36,691 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:36,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1899706606, now seen corresponding path program 1 times [2021-11-07 01:44:36,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:36,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279735983] [2021-11-07 01:44:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:36,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:36,698 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:36,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:44:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:37,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:37,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:37,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279735983] [2021-11-07 01:44:37,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279735983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:37,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:37,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:44:37,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702356859] [2021-11-07 01:44:37,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:44:37,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:44:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:37,744 INFO L87 Difference]: Start difference. First operand 4741 states and 8912 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:41,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:41,401 INFO L93 Difference]: Finished difference Result 19060 states and 35777 transitions. [2021-11-07 01:44:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:44:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:44:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:41,450 INFO L225 Difference]: With dead ends: 19060 [2021-11-07 01:44:41,450 INFO L226 Difference]: Without dead ends: 14362 [2021-11-07 01:44:41,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14362 states. [2021-11-07 01:44:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14362 to 4749. [2021-11-07 01:44:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 4744 states have (on average 1.8802698145025296) internal successors, (8920), 4748 states have internal predecessors, (8920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 8920 transitions. [2021-11-07 01:44:41,827 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 8920 transitions. Word has length 55 [2021-11-07 01:44:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:41,830 INFO L470 AbstractCegarLoop]: Abstraction has 4749 states and 8920 transitions. [2021-11-07 01:44:41,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 8920 transitions. [2021-11-07 01:44:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:44:41,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:41,834 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:41,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:42,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:42,052 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash 175354806, now seen corresponding path program 1 times [2021-11-07 01:44:42,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:42,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111073709] [2021-11-07 01:44:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:42,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:42,057 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:42,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:44:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:42,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:42,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:43,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:43,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111073709] [2021-11-07 01:44:43,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111073709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:43,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:43,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:44:43,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020169603] [2021-11-07 01:44:43,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:44:43,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:44:43,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:43,163 INFO L87 Difference]: Start difference. First operand 4749 states and 8920 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:51,387 INFO L93 Difference]: Finished difference Result 13321 states and 24966 transitions. [2021-11-07 01:44:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:44:51,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:44:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:51,417 INFO L225 Difference]: With dead ends: 13321 [2021-11-07 01:44:51,417 INFO L226 Difference]: Without dead ends: 9964 [2021-11-07 01:44:51,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9964 states. [2021-11-07 01:44:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9964 to 8917. [2021-11-07 01:44:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8912 states have (on average 1.882181328545781) internal successors, (16774), 8916 states have internal predecessors, (16774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 16774 transitions. [2021-11-07 01:44:51,939 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 16774 transitions. Word has length 56 [2021-11-07 01:44:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:51,940 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 16774 transitions. [2021-11-07 01:44:51,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 16774 transitions. [2021-11-07 01:44:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:44:51,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:51,947 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 01:44:51,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:52,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:52,165 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash 929178046, now seen corresponding path program 1 times [2021-11-07 01:44:52,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:52,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814272466] [2021-11-07 01:44:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:52,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:52,168 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:52,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:44:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:53,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:53,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:53,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814272466] [2021-11-07 01:44:53,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814272466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:53,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:53,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:53,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8124392] [2021-11-07 01:44:53,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:53,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:53,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:53,291 INFO L87 Difference]: Start difference. First operand 8917 states and 16774 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:55,948 INFO L93 Difference]: Finished difference Result 17381 states and 32520 transitions. [2021-11-07 01:44:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:44:55,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:44:55,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:55,978 INFO L225 Difference]: With dead ends: 17381 [2021-11-07 01:44:55,979 INFO L226 Difference]: Without dead ends: 9848 [2021-11-07 01:44:55,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-07 01:44:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 8849. [2021-11-07 01:44:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8844 states have (on average 1.8713251922207146) internal successors, (16550), 8848 states have internal predecessors, (16550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 16550 transitions. [2021-11-07 01:44:56,507 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 16550 transitions. Word has length 57 [2021-11-07 01:44:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:56,507 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 16550 transitions. [2021-11-07 01:44:56,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 16550 transitions. [2021-11-07 01:44:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:44:56,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:56,517 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:56,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:56,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:56,735 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash 547951710, now seen corresponding path program 1 times [2021-11-07 01:44:56,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:56,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933044949] [2021-11-07 01:44:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:56,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:56,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:56,739 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:56,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:44:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:57,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:57,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:57,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:57,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:57,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933044949] [2021-11-07 01:44:57,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933044949] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:57,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:57,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:44:57,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367643403] [2021-11-07 01:44:57,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:44:57,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:44:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:57,757 INFO L87 Difference]: Start difference. First operand 8849 states and 16550 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:00,513 INFO L93 Difference]: Finished difference Result 64605 states and 121111 transitions. [2021-11-07 01:45:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:45:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:45:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:00,639 INFO L225 Difference]: With dead ends: 64605 [2021-11-07 01:45:00,639 INFO L226 Difference]: Without dead ends: 55795 [2021-11-07 01:45:00,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:45:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55795 states. [2021-11-07 01:45:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55795 to 16688. [2021-11-07 01:45:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16688 states, 16683 states have (on average 1.8722052388659114) internal successors, (31234), 16687 states have internal predecessors, (31234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16688 states to 16688 states and 31234 transitions. [2021-11-07 01:45:02,161 INFO L78 Accepts]: Start accepts. Automaton has 16688 states and 31234 transitions. Word has length 58 [2021-11-07 01:45:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:02,161 INFO L470 AbstractCegarLoop]: Abstraction has 16688 states and 31234 transitions. [2021-11-07 01:45:02,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 16688 states and 31234 transitions. [2021-11-07 01:45:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:45:02,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:02,165 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:02,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:02,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:02,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash 413938204, now seen corresponding path program 1 times [2021-11-07 01:45:02,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:02,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523323185] [2021-11-07 01:45:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:02,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:02,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:02,391 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:02,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:45:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:03,204 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 01:45:03,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:03,407 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 01:45:03,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:03,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523323185] [2021-11-07 01:45:03,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523323185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:03,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:03,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:45:03,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038098689] [2021-11-07 01:45:03,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:03,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:03,410 INFO L87 Difference]: Start difference. First operand 16688 states and 31234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:05,681 INFO L93 Difference]: Finished difference Result 60853 states and 114101 transitions. [2021-11-07 01:45:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:45:05,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:45:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:05,790 INFO L225 Difference]: With dead ends: 60853 [2021-11-07 01:45:05,790 INFO L226 Difference]: Without dead ends: 48801 [2021-11-07 01:45:05,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:45:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48801 states. [2021-11-07 01:45:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48801 to 28183. [2021-11-07 01:45:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28183 states, 28178 states have (on average 1.8738732344382143) internal successors, (52802), 28182 states have internal predecessors, (52802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28183 states to 28183 states and 52802 transitions. [2021-11-07 01:45:07,903 INFO L78 Accepts]: Start accepts. Automaton has 28183 states and 52802 transitions. Word has length 58 [2021-11-07 01:45:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:07,904 INFO L470 AbstractCegarLoop]: Abstraction has 28183 states and 52802 transitions. [2021-11-07 01:45:07,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 28183 states and 52802 transitions. [2021-11-07 01:45:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:45:07,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:07,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:07,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:45:08,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:08,107 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1610349402, now seen corresponding path program 1 times [2021-11-07 01:45:08,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:08,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43057006] [2021-11-07 01:45:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:08,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:08,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:08,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:45:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:45:08,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:08,980 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 01:45:08,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:09,246 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 01:45:09,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:09,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43057006] [2021-11-07 01:45:09,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43057006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:09,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:09,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:45:09,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166603847] [2021-11-07 01:45:09,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:09,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:45:09,250 INFO L87 Difference]: Start difference. First operand 28183 states and 52802 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:18,992 INFO L93 Difference]: Finished difference Result 178393 states and 334893 transitions. [2021-11-07 01:45:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:45:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:45:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:19,369 INFO L225 Difference]: With dead ends: 178393 [2021-11-07 01:45:19,369 INFO L226 Difference]: Without dead ends: 154846 [2021-11-07 01:45:19,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:45:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154846 states. [2021-11-07 01:45:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154846 to 49001. [2021-11-07 01:45:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49001 states, 48996 states have (on average 1.8754592211609111) internal successors, (91890), 49000 states have internal predecessors, (91890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49001 states to 49001 states and 91890 transitions. [2021-11-07 01:45:23,197 INFO L78 Accepts]: Start accepts. Automaton has 49001 states and 91890 transitions. Word has length 60 [2021-11-07 01:45:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:23,197 INFO L470 AbstractCegarLoop]: Abstraction has 49001 states and 91890 transitions. [2021-11-07 01:45:23,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 49001 states and 91890 transitions. [2021-11-07 01:45:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:45:23,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:23,201 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:23,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:23,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:23,407 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -491605417, now seen corresponding path program 1 times [2021-11-07 01:45:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:23,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942604959] [2021-11-07 01:45:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:23,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:23,410 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:23,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:45:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:24,225 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 01:45:24,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:24,372 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 01:45:24,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:24,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942604959] [2021-11-07 01:45:24,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942604959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:24,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:24,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:45:24,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900153301] [2021-11-07 01:45:24,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:24,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:24,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:24,376 INFO L87 Difference]: Start difference. First operand 49001 states and 91890 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:29,497 INFO L93 Difference]: Finished difference Result 121013 states and 226325 transitions. [2021-11-07 01:45:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:45:29,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:45:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:29,632 INFO L225 Difference]: With dead ends: 121013 [2021-11-07 01:45:29,632 INFO L226 Difference]: Without dead ends: 73900 [2021-11-07 01:45:29,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73900 states. [2021-11-07 01:45:32,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73900 to 48761. [2021-11-07 01:45:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 48756 states have (on average 1.866724095495939) internal successors, (91014), 48760 states have internal predecessors, (91014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 91014 transitions. [2021-11-07 01:45:32,827 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 91014 transitions. Word has length 67 [2021-11-07 01:45:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:32,828 INFO L470 AbstractCegarLoop]: Abstraction has 48761 states and 91014 transitions. [2021-11-07 01:45:32,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 91014 transitions. [2021-11-07 01:45:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:45:32,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:32,830 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:32,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:33,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:33,032 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash -413894374, now seen corresponding path program 1 times [2021-11-07 01:45:33,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:33,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391003354] [2021-11-07 01:45:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:33,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:33,034 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:45:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:33,866 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 01:45:33,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:34,024 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 01:45:34,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:34,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391003354] [2021-11-07 01:45:34,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391003354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:34,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:34,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:45:34,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271090695] [2021-11-07 01:45:34,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:34,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:34,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:34,027 INFO L87 Difference]: Start difference. First operand 48761 states and 91014 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:36,780 INFO L93 Difference]: Finished difference Result 93033 states and 173618 transitions. [2021-11-07 01:45:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:45:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:36,887 INFO L225 Difference]: With dead ends: 93033 [2021-11-07 01:45:36,887 INFO L226 Difference]: Without dead ends: 48776 [2021-11-07 01:45:36,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48776 states. [2021-11-07 01:45:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48776 to 48761. [2021-11-07 01:45:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 48756 states have (on average 1.861391418492083) internal successors, (90754), 48760 states have internal predecessors, (90754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 90754 transitions. [2021-11-07 01:45:39,741 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 90754 transitions. Word has length 67 [2021-11-07 01:45:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:39,742 INFO L470 AbstractCegarLoop]: Abstraction has 48761 states and 90754 transitions. [2021-11-07 01:45:39,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 90754 transitions. [2021-11-07 01:45:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:45:39,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:39,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:39,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:45:39,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:39,964 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1724967041, now seen corresponding path program 1 times [2021-11-07 01:45:39,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:39,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458945919] [2021-11-07 01:45:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:39,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:39,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:39,969 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:39,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86fc6871-8dbd-4062-990d-6d7d1691558f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:45:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:40,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:45:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:40,927 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 01:45:40,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:41,157 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 01:45:41,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:41,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458945919] [2021-11-07 01:45:41,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458945919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:41,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:41,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:45:41,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677706532] [2021-11-07 01:45:41,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:41,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:45:41,160 INFO L87 Difference]: Start difference. First operand 48761 states and 90754 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)