./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i --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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/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 08a64b64599ceefef00723a17bd9cad66dbb7d4e6f08f1e5c61a19e368f8af19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:46:20,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:46:20,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:46:20,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:46:20,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:46:20,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:46:20,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:46:20,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:46:20,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:46:20,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:46:20,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:46:20,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:46:20,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:46:20,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:46:20,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:46:20,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:46:20,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:46:20,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:46:20,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:46:20,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:46:20,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:46:20,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:46:20,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:46:20,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:46:20,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:46:20,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:46:20,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:46:20,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:46:20,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:46:20,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:46:20,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:46:20,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:46:20,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:46:20,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:46:20,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:46:20,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:46:20,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:46:20,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:46:20,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:46:20,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:46:20,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:46:20,640 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:46:20,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:46:20,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:46:20,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:46:20,694 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:46:20,694 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:46:20,695 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:46:20,695 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:46:20,698 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:46:20,698 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:46:20,698 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:46:20,700 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:46:20,700 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:46:20,700 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:46:20,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:46:20,701 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:46:20,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:46:20,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:46:20,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:46:20,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:46:20,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:46:20,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:46:20,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:46:20,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:46:20,704 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:46:20,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:46:20,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:46:20,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:46:20,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:46:20,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:46:20,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:46:20,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:46:20,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:46:20,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:46:20,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:46:20,708 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:46:20,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:46:20,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:46:20,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:46:20,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:46:20,709 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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08a64b64599ceefef00723a17bd9cad66dbb7d4e6f08f1e5c61a19e368f8af19 [2021-11-07 01:46:20,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:46:21,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:46:21,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:46:21,023 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:46:21,024 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:46:21,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2021-11-07 01:46:21,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data/13b094071/cc8925945df74e15ba99b3e8afc63d34/FLAG80b86150d [2021-11-07 01:46:21,533 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:46:21,534 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2021-11-07 01:46:21,540 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data/13b094071/cc8925945df74e15ba99b3e8afc63d34/FLAG80b86150d [2021-11-07 01:46:21,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data/13b094071/cc8925945df74e15ba99b3e8afc63d34 [2021-11-07 01:46:21,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:46:21,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:46:21,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:46:21,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:46:21,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:46:21,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:46:21" (1/1) ... [2021-11-07 01:46:21,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a54f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:21, skipping insertion in model container [2021-11-07 01:46:21,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:46:21" (1/1) ... [2021-11-07 01:46:21,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:46:21,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:46:22,147 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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] [2021-11-07 01:46:22,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:46:22,179 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 01:46:22,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d4f5d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:22, skipping insertion in model container [2021-11-07 01:46:22,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:46:22,180 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:46:22,182 INFO L168 Benchmark]: Toolchain (without parser) took 253.92 ms. Allocated memory is still 92.3 MB. Free memory was 57.3 MB in the beginning and 69.1 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:46:22,183 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 62.3 MB in the beginning and 62.2 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:46:22,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.45 ms. Allocated memory is still 92.3 MB. Free memory was 57.1 MB in the beginning and 69.1 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:46:22,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 62.3 MB in the beginning and 62.2 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.45 ms. Allocated memory is still 92.3 MB. Free memory was 57.1 MB in the beginning and 69.1 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 32]: 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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/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 08a64b64599ceefef00723a17bd9cad66dbb7d4e6f08f1e5c61a19e368f8af19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:46:24,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:46:24,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:46:24,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:46:24,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:46:24,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:46:24,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:46:24,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:46:24,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:46:24,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:46:24,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:46:24,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:46:24,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:46:24,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:46:24,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:46:24,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:46:24,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:46:24,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:46:24,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:46:24,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:46:24,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:46:24,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:46:24,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:46:24,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:46:24,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:46:24,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:46:24,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:46:24,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:46:24,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:46:24,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:46:24,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:46:24,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:46:24,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:46:24,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:46:24,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:46:24,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:46:24,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:46:24,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:46:24,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:46:24,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:46:24,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:46:24,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:46:24,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:46:24,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:46:24,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:46:24,659 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:46:24,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:46:24,660 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:46:24,660 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:46:24,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:46:24,660 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:46:24,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:46:24,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:46:24,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:46:24,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:46:24,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:46:24,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:46:24,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:46:24,664 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:46:24,664 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:46:24,664 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:46:24,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:46:24,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:46:24,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:46:24,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:46:24,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:46:24,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:46:24,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:46:24,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:46:24,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:46:24,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:46:24,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:46:24,666 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:46:24,667 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:24,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:46:24,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:46:24,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:46:24,668 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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08a64b64599ceefef00723a17bd9cad66dbb7d4e6f08f1e5c61a19e368f8af19 [2021-11-07 01:46:25,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:46:25,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:46:25,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:46:25,067 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:46:25,068 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:46:25,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2021-11-07 01:46:25,148 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data/d2fe71624/353d2fc76e234837a45e8a8597e5ba76/FLAGeba4af569 [2021-11-07 01:46:25,763 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:46:25,763 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2021-11-07 01:46:25,771 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data/d2fe71624/353d2fc76e234837a45e8a8597e5ba76/FLAGeba4af569 [2021-11-07 01:46:26,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/data/d2fe71624/353d2fc76e234837a45e8a8597e5ba76 [2021-11-07 01:46:26,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:46:26,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:46:26,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:46:26,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:46:26,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:46:26,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d91e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26, skipping insertion in model container [2021-11-07 01:46:26,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:46:26,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:46:26,307 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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] [2021-11-07 01:46:26,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:46:26,344 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:46:26,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:46:26,352 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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] [2021-11-07 01:46:26,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:46:26,367 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:46:26,380 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_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] [2021-11-07 01:46:26,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:46:26,424 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:46:26,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26 WrapperNode [2021-11-07 01:46:26,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:46:26,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:46:26,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:46:26,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:46:26,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:46:26,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:46:26,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:46:26,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:46:26,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:46:26,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:46:26,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:46:26,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:46:26,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (1/1) ... [2021-11-07 01:46:26,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:46:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:26,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:46:26,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:46:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:46:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:46:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:46:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:46:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:46:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:46:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:46:26,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:46:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:46:27,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:46:27,060 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 01:46:27,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:46:27 BoogieIcfgContainer [2021-11-07 01:46:27,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:46:27,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:46:27,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:46:27,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:46:27,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:46:26" (1/3) ... [2021-11-07 01:46:27,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484401fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:46:27, skipping insertion in model container [2021-11-07 01:46:27,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:46:26" (2/3) ... [2021-11-07 01:46:27,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484401fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:46:27, skipping insertion in model container [2021-11-07 01:46:27,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:46:27" (3/3) ... [2021-11-07 01:46:27,091 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2021-11-07 01:46:27,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:46:27,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:46:27,168 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:46:27,177 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 01:46:27,177 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:46:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 01:46:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:46:27,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:27,208 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:27,209 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash -739796340, now seen corresponding path program 1 times [2021-11-07 01:46:27,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:27,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596626715] [2021-11-07 01:46:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:27,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:27,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:27,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:46:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:27,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:46:27,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:27,396 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 01:46:27,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:27,452 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 01:46:27,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:27,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596626715] [2021-11-07 01:46:27,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596626715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:27,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:27,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:46:27,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665242651] [2021-11-07 01:46:27,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:46:27,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:27,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:46:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:46:27,493 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 01:46:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:27,508 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-11-07 01:46:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:46:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 01:46:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:27,518 INFO L225 Difference]: With dead ends: 34 [2021-11-07 01:46:27,518 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 01:46:27,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 01:46:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 01:46:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 01:46:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 01:46:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-07 01:46:27,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 9 [2021-11-07 01:46:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:27,552 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-07 01:46:27,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 01:46:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-07 01:46:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:46:27,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:27,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:27,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:27,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:27,771 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1452551885, now seen corresponding path program 1 times [2021-11-07 01:46:27,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:27,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648929578] [2021-11-07 01:46:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:27,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:27,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:27,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:46:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:27,902 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 01:46:27,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:27,935 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 01:46:27,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:27,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648929578] [2021-11-07 01:46:27,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648929578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:27,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:27,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:46:27,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879239828] [2021-11-07 01:46:27,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:27,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:46:27,939 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 01:46:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:27,996 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-11-07 01:46:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:27,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 9 [2021-11-07 01:46:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:27,998 INFO L225 Difference]: With dead ends: 42 [2021-11-07 01:46:27,998 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 01:46:27,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 01:46:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 01:46:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2021-11-07 01:46:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 01:46:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2021-11-07 01:46:28,005 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 9 [2021-11-07 01:46:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:28,006 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2021-11-07 01:46:28,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 01:46:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2021-11-07 01:46:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:46:28,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:28,007 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:28,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:28,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:28,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash -475799373, now seen corresponding path program 1 times [2021-11-07 01:46:28,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:28,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103657798] [2021-11-07 01:46:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:28,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:28,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:28,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:28,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:46:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:28,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:46:28,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:46:28,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:28,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103657798] [2021-11-07 01:46:28,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103657798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:28,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:28,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:28,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447275407] [2021-11-07 01:46:28,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:28,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:28,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:28,511 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states 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 01:46:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:28,557 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2021-11-07 01:46:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:28,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 19 [2021-11-07 01:46:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:28,560 INFO L225 Difference]: With dead ends: 61 [2021-11-07 01:46:28,560 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 01:46:28,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 01:46:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-07 01:46:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 01:46:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-11-07 01:46:28,573 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 19 [2021-11-07 01:46:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:28,573 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-11-07 01:46:28,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states 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 01:46:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-11-07 01:46:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:46:28,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:28,575 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:28,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:28,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:28,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash -795803149, now seen corresponding path program 1 times [2021-11-07 01:46:28,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:28,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170159523] [2021-11-07 01:46:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:28,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:28,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:28,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:28,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:46:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:28,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:29,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:29,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170159523] [2021-11-07 01:46:29,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170159523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:29,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1570947132] [2021-11-07 01:46:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:29,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:29,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:29,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:29,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:46:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:29,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:46:29,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:46:29,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1570947132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:29,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:29,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:46:29,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365179245] [2021-11-07 01:46:29,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:29,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:46:29,334 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 01:46:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:29,349 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-11-07 01:46:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:29,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 19 [2021-11-07 01:46:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:29,351 INFO L225 Difference]: With dead ends: 35 [2021-11-07 01:46:29,351 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 01:46:29,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:46:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 01:46:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 01:46:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 01:46:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-11-07 01:46:29,357 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 19 [2021-11-07 01:46:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:29,357 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-11-07 01:46:29,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 01:46:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-11-07 01:46:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:46:29,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:29,359 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:29,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:29,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:29,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:29,760 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:29,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:29,761 INFO L85 PathProgramCache]: Analyzing trace with hash -795862731, now seen corresponding path program 1 times [2021-11-07 01:46:29,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:29,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253586146] [2021-11-07 01:46:29,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:29,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:29,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:29,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:46:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:29,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:30,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:30,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253586146] [2021-11-07 01:46:30,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253586146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:30,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1450654021] [2021-11-07 01:46:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:30,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:30,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:30,093 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:30,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:46:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:30,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:30,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:30,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:30,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1450654021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:30,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629144702] [2021-11-07 01:46:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:30,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:30,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:30,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:30,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:46:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:30,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:30,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:30,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629144702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:30,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:46:30,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 01:46:30,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057260515] [2021-11-07 01:46:30,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:46:30,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:46:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:46:30,692 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 01:46:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:30,929 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-11-07 01:46:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:46:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 19 [2021-11-07 01:46:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:30,932 INFO L225 Difference]: With dead ends: 111 [2021-11-07 01:46:30,932 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 01:46:30,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:46:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 01:46:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 55. [2021-11-07 01:46:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 54 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2021-11-07 01:46:30,942 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 19 [2021-11-07 01:46:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:30,943 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2021-11-07 01:46:30,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 01:46:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2021-11-07 01:46:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:46:30,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:30,945 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:30,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:31,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:31,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-07 01:46:31,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:31,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash -572216651, now seen corresponding path program 2 times [2021-11-07 01:46:31,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:31,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495492092] [2021-11-07 01:46:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:31,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:31,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:31,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:46:31,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:31,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:46:31,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:31,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:32,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:32,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495492092] [2021-11-07 01:46:32,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495492092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:32,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111785883] [2021-11-07 01:46:32,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:32,268 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:32,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:32,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:32,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:46:32,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:32,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:32,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:46:32,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:32,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:32,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111785883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:32,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076190460] [2021-11-07 01:46:32,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:32,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:32,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:32,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:32,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 01:46:33,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:46:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:33,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:33,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076190460] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:33,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:46:33,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-07 01:46:33,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658498093] [2021-11-07 01:46:33,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:46:33,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:46:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:46:33,446 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:34,385 INFO L93 Difference]: Finished difference Result 239 states and 320 transitions. [2021-11-07 01:46:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:46:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 01:46:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:34,389 INFO L225 Difference]: With dead ends: 239 [2021-11-07 01:46:34,389 INFO L226 Difference]: Without dead ends: 229 [2021-11-07 01:46:34,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:46:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-07 01:46:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 111. [2021-11-07 01:46:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4181818181818182) internal successors, (156), 110 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 01:46:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2021-11-07 01:46:34,405 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 39 [2021-11-07 01:46:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:34,406 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2021-11-07 01:46:34,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2021-11-07 01:46:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:46:34,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:34,410 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:34,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-07 01:46:34,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:34,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:35,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:35,013 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:35,014 INFO L85 PathProgramCache]: Analyzing trace with hash 445025717, now seen corresponding path program 3 times [2021-11-07 01:46:35,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:35,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663346835] [2021-11-07 01:46:35,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:46:35,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:35,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:35,016 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:35,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:46:35,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 01:46:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:35,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:46:35,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:35,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:36,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:36,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663346835] [2021-11-07 01:46:36,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663346835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:36,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648495574] [2021-11-07 01:46:36,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:46:36,850 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:36,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:36,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:36,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:46:39,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 01:46:39,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:46:40,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:40,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:42,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648495574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:42,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128907628] [2021-11-07 01:46:42,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:46:42,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:42,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:42,563 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:42,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:47:09,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 01:47:09,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:09,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:47:09,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:09,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:10,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128907628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:10,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:47:10,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 18, 17, 18] total 46 [2021-11-07 01:47:10,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371273385] [2021-11-07 01:47:10,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 01:47:10,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 01:47:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 01:47:10,685 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand has 46 states, 46 states have (on average 4.739130434782608) internal successors, (218), 46 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 01:47:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:15,150 INFO L93 Difference]: Finished difference Result 495 states and 664 transitions. [2021-11-07 01:47:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:47:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.739130434782608) internal successors, (218), 46 states have internal predecessors, (218), 0 states have call successors, (0), 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 79 [2021-11-07 01:47:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:15,155 INFO L225 Difference]: With dead ends: 495 [2021-11-07 01:47:15,155 INFO L226 Difference]: Without dead ends: 485 [2021-11-07 01:47:15,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1215, Invalid=2445, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 01:47:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-07 01:47:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 223. [2021-11-07 01:47:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.4234234234234233) internal successors, (316), 222 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 01:47:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 316 transitions. [2021-11-07 01:47:15,180 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 316 transitions. Word has length 79 [2021-11-07 01:47:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:15,180 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 316 transitions. [2021-11-07 01:47:15,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.739130434782608) internal successors, (218), 46 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 01:47:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 316 transitions. [2021-11-07 01:47:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-07 01:47:15,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:15,188 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:15,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:15,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:15,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:15,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:15,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1378702261, now seen corresponding path program 4 times [2021-11-07 01:47:15,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:15,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195745167] [2021-11-07 01:47:15,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:47:15,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:15,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:15,797 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:15,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:47:16,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:47:16,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:16,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 01:47:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:17,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:20,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:20,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195745167] [2021-11-07 01:47:20,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195745167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:20,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1953428711] [2021-11-07 01:47:20,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:47:20,147 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:20,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:20,148 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:20,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:47:20,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:47:20,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:20,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 01:47:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:21,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:22,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1953428711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:22,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023472282] [2021-11-07 01:47:22,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:47:22,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:22,027 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:22,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:47:22,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:47:22,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 01:47:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:23,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:23,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023472282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:23,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:47:23,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 64 [2021-11-07 01:47:23,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951088493] [2021-11-07 01:47:23,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 01:47:23,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:23,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 01:47:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 01:47:23,732 INFO L87 Difference]: Start difference. First operand 223 states and 316 transitions. Second operand has 64 states, 64 states have (on average 4.859375) internal successors, (311), 64 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 01:47:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:43,775 INFO L93 Difference]: Finished difference Result 1007 states and 1352 transitions. [2021-11-07 01:47:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 01:47:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.859375) internal successors, (311), 64 states have internal predecessors, (311), 0 states have call successors, (0), 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 159 [2021-11-07 01:47:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:43,782 INFO L225 Difference]: With dead ends: 1007 [2021-11-07 01:47:43,783 INFO L226 Difference]: Without dead ends: 997 [2021-11-07 01:47:43,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 886 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 01:47:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-07 01:47:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 447. [2021-11-07 01:47:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.4260089686098654) internal successors, (636), 446 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 01:47:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 636 transitions. [2021-11-07 01:47:43,817 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 636 transitions. Word has length 159 [2021-11-07 01:47:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:43,818 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 636 transitions. [2021-11-07 01:47:43,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.859375) internal successors, (311), 64 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 01:47:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 636 transitions. [2021-11-07 01:47:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-07 01:47:43,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:43,827 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:43,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:44,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-07 01:47:44,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:47:44,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:44,431 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash -284762187, now seen corresponding path program 5 times [2021-11-07 01:47:44,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:44,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822931494] [2021-11-07 01:47:44,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:47:44,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:44,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:44,435 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:44,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:47:49,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2021-11-07 01:47:49,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-07 01:47:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:52,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:06,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:06,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822931494] [2021-11-07 01:48:06,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822931494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:06,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1005805498] [2021-11-07 01:48:06,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:48:06,056 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:06,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:06,059 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:06,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:52:46,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2021-11-07 01:52:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:47,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 01:52:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:48,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:08,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1005805498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:08,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205072816] [2021-11-07 01:53:08,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:53:08,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:08,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:08,749 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:08,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89dfa0b6-f36c-4dc2-864c-0e1e30e2ed55/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process