./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/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 64bit --witnessprinter.graph.data.programhash 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:57:31,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:57:31,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:57:31,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:57:31,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:57:31,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:57:31,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:57:31,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:57:31,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:57:31,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:57:31,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:57:31,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:57:31,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:57:31,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:57:31,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:57:31,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:57:31,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:57:31,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:57:31,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:57:31,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:57:31,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:57:31,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:57:31,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:57:31,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:57:31,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:57:31,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:57:31,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:57:31,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:57:31,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:57:31,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:57:31,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:57:31,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:57:31,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:57:31,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:57:31,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:57:31,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:57:31,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:57:31,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:57:31,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:57:31,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:57:31,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:57:31,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:57:31,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:57:31,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:57:31,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:57:31,737 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:57:31,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:57:31,738 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:57:31,738 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:57:31,738 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:57:31,739 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:57:31,739 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:57:31,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:57:31,749 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:57:31,749 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:57:31,749 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:57:31,750 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:57:31,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:57:31,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:57:31,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:57:31,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:57:31,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:57:31,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:57:31,753 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:57:31,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:57:31,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:57:31,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:57:31,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:57:31,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:57:31,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:57:31,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:57:31,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:57:31,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:57:31,758 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:57:31,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:57:31,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:57:31,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:57:31,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:57:31,759 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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 [2021-11-07 01:57:32,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:57:32,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:57:32,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:57:32,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:57:32,137 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:57:32,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-07 01:57:32,245 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data/d1f97c0e1/afee5bd9a60e46809a63755844a0d896/FLAGd1b6db27f [2021-11-07 01:57:33,236 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:57:33,244 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-07 01:57:33,314 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data/d1f97c0e1/afee5bd9a60e46809a63755844a0d896/FLAGd1b6db27f [2021-11-07 01:57:33,663 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data/d1f97c0e1/afee5bd9a60e46809a63755844a0d896 [2021-11-07 01:57:33,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:57:33,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:57:33,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:33,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:57:33,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:57:33,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:33" (1/1) ... [2021-11-07 01:57:33,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544bc9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:33, skipping insertion in model container [2021-11-07 01:57:33,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:33" (1/1) ... [2021-11-07 01:57:33,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:57:33,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:57:34,691 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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-07 01:57:34,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:34,931 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 01:57:34,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@370d4d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:34, skipping insertion in model container [2021-11-07 01:57:34,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:34,935 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:57:34,938 INFO L168 Benchmark]: Toolchain (without parser) took 1268.49 ms. Allocated memory is still 144.7 MB. Free memory was 104.2 MB in the beginning and 84.2 MB in the end (delta: 20.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:57:34,939 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory is still 39.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:57:34,940 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1252.30 ms. Allocated memory is still 144.7 MB. Free memory was 103.9 MB in the beginning and 84.2 MB in the end (delta: 19.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:57:34,943 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory is still 39.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1252.30 ms. Allocated memory is still 144.7 MB. Free memory was 103.9 MB in the beginning and 84.2 MB in the end (delta: 19.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5422]: 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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/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 64bit --witnessprinter.graph.data.programhash 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:57:37,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:57:37,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:57:37,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:57:37,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:57:37,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:57:37,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:57:37,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:57:37,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:57:37,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:57:37,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:57:37,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:57:37,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:57:37,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:57:37,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:57:37,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:57:37,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:57:37,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:57:37,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:57:37,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:57:37,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:57:37,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:57:37,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:57:37,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:57:37,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:57:37,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:57:37,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:57:37,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:57:37,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:57:37,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:57:37,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:57:37,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:57:37,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:57:37,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:57:37,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:57:37,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:57:37,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:57:37,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:57:37,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:57:37,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:57:37,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:57:37,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:57:38,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:57:38,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:57:38,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:57:38,006 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:57:38,006 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:57:38,007 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:57:38,007 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:57:38,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:57:38,008 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:57:38,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:57:38,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:57:38,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:57:38,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:57:38,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:57:38,012 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:57:38,012 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:57:38,013 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:57:38,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:57:38,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:57:38,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:57:38,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:57:38,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:57:38,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:57:38,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:57:38,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:57:38,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:57:38,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:57:38,016 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:57:38,016 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:38,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:57:38,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:57:38,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:57:38,018 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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 [2021-11-07 01:57:38,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:57:38,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:57:38,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:57:38,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:57:38,495 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:57:38,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-07 01:57:38,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data/58d5268c0/2dfaeacfdc094576a283d27bbc8ce466/FLAGb43e6edd8 [2021-11-07 01:57:39,634 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:57:39,636 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-07 01:57:39,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data/58d5268c0/2dfaeacfdc094576a283d27bbc8ce466/FLAGb43e6edd8 [2021-11-07 01:57:40,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/data/58d5268c0/2dfaeacfdc094576a283d27bbc8ce466 [2021-11-07 01:57:40,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:57:40,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:57:40,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:40,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:57:40,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:57:40,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:40" (1/1) ... [2021-11-07 01:57:40,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67681640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:40, skipping insertion in model container [2021-11-07 01:57:40,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:40" (1/1) ... [2021-11-07 01:57:40,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:57:40,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:57:41,263 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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-07 01:57:41,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:41,624 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:57:41,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:57:41,864 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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-07 01:57:41,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:41,981 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:57:42,220 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_be3b7c94-0eae-4ad6-b63a-3af1760ff108/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-07 01:57:42,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:42,400 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:57:42,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42 WrapperNode [2021-11-07 01:57:42,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:42,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:57:42,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:57:42,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:57:42,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:57:42,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:57:42,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:57:42,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:57:42,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:57:42,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:57:42,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:57:42,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:57:42,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (1/1) ... [2021-11-07 01:57:42,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:57:42,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:57:42,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:57:42,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:57:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:57:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:57:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:57:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:57:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:57:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:57:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:57:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:57:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:57:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:57:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:57:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:57:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:57:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:57:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:57:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:57:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:57:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:57:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:57:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:57:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:57:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:57:42,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:57:55,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:57:55,990 INFO L299 CfgBuilder]: Removed 166 assume(true) statements. [2021-11-07 01:57:55,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:55 BoogieIcfgContainer [2021-11-07 01:57:55,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:57:55,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:57:55,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:57:55,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:57:55,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:57:40" (1/3) ... [2021-11-07 01:57:55,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb5f42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:55, skipping insertion in model container [2021-11-07 01:57:55,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:42" (2/3) ... [2021-11-07 01:57:56,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb5f42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:56, skipping insertion in model container [2021-11-07 01:57:56,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:55" (3/3) ... [2021-11-07 01:57:56,002 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-07 01:57:56,007 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:57:56,008 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:57:56,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:57:56,060 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 01:57:56,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:57:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 198 states, 196 states have (on average 1.5) internal successors, (294), 197 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:57:56,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:56,097 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:56,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash 676168125, now seen corresponding path program 1 times [2021-11-07 01:57:56,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:56,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172619042] [2021-11-07 01:57:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:56,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:56,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:56,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:56,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:57:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:56,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:57:56,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:56,590 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 01:57:56,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:56,689 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 01:57:56,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:56,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172619042] [2021-11-07 01:57:56,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172619042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:56,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:56,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:57:56,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127519024] [2021-11-07 01:57:56,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:57:56,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:57:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:57:56,718 INFO L87 Difference]: Start difference. First operand has 198 states, 196 states have (on average 1.5) internal successors, (294), 197 states have internal predecessors, (294), 0 states have call successors, (0), 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 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:56,770 INFO L93 Difference]: Finished difference Result 392 states and 583 transitions. [2021-11-07 01:57:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:57:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-07 01:57:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:56,786 INFO L225 Difference]: With dead ends: 392 [2021-11-07 01:57:56,788 INFO L226 Difference]: Without dead ends: 191 [2021-11-07 01:57:56,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 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 01:57:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-07 01:57:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-07 01:57:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.368421052631579) internal successors, (260), 190 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 260 transitions. [2021-11-07 01:57:56,875 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 260 transitions. Word has length 20 [2021-11-07 01:57:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:56,876 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 260 transitions. [2021-11-07 01:57:56,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 260 transitions. [2021-11-07 01:57:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:57:56,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:56,885 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:56,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:57,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:57,099 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash -912179777, now seen corresponding path program 1 times [2021-11-07 01:57:57,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:57,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260106990] [2021-11-07 01:57:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:57,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:57,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:57,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:57,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:57:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:57,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:57:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:57,526 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 01:57:57,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:57,626 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 01:57:57,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:57,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260106990] [2021-11-07 01:57:57,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260106990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:57,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:57,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:57,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874507960] [2021-11-07 01:57:57,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:57,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:57,632 INFO L87 Difference]: Start difference. First operand 191 states and 260 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:57,678 INFO L93 Difference]: Finished difference Result 375 states and 513 transitions. [2021-11-07 01:57:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-07 01:57:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:57,681 INFO L225 Difference]: With dead ends: 375 [2021-11-07 01:57:57,681 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 01:57:57,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 01:57:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 01:57:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-11-07 01:57:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.3664921465968587) internal successors, (261), 191 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 261 transitions. [2021-11-07 01:57:57,698 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 261 transitions. Word has length 20 [2021-11-07 01:57:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:57,698 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 261 transitions. [2021-11-07 01:57:57,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 261 transitions. [2021-11-07 01:57:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:57:57,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:57,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:57,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:57,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:57,915 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:57,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2122365623, now seen corresponding path program 1 times [2021-11-07 01:57:57,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:57,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975337989] [2021-11-07 01:57:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:57,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:57,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:57,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:57:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:58,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:57:58,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:57:58,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:58,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975337989] [2021-11-07 01:57:58,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975337989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:58,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:58,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:58,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332483350] [2021-11-07 01:57:58,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:58,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:58,425 INFO L87 Difference]: Start difference. First operand 192 states and 261 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:59,179 INFO L93 Difference]: Finished difference Result 691 states and 957 transitions. [2021-11-07 01:57:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 21 [2021-11-07 01:57:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:59,185 INFO L225 Difference]: With dead ends: 691 [2021-11-07 01:57:59,186 INFO L226 Difference]: Without dead ends: 509 [2021-11-07 01:57:59,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 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 01:57:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-07 01:57:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2021-11-07 01:57:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3838582677165354) internal successors, (703), 508 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 703 transitions. [2021-11-07 01:57:59,233 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 703 transitions. Word has length 21 [2021-11-07 01:57:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:59,234 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 703 transitions. [2021-11-07 01:57:59,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 703 transitions. [2021-11-07 01:57:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:57:59,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:59,241 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:59,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:59,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:59,456 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1478100298, now seen corresponding path program 1 times [2021-11-07 01:57:59,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:59,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583787865] [2021-11-07 01:57:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:59,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:59,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:59,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:59,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:57:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:57:59,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:57:59,961 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:59,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583787865] [2021-11-07 01:57:59,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583787865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:59,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:59,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:59,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78505710] [2021-11-07 01:57:59,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:59,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:59,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:59,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:59,963 INFO L87 Difference]: Start difference. First operand 509 states and 703 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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 01:58:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:00,050 INFO L93 Difference]: Finished difference Result 1013 states and 1403 transitions. [2021-11-07 01:58:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) Word has length 28 [2021-11-07 01:58:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:00,055 INFO L225 Difference]: With dead ends: 1013 [2021-11-07 01:58:00,056 INFO L226 Difference]: Without dead ends: 514 [2021-11-07 01:58:00,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 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 01:58:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-07 01:58:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-07 01:58:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.3820662768031189) internal successors, (709), 513 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 709 transitions. [2021-11-07 01:58:00,107 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 709 transitions. Word has length 28 [2021-11-07 01:58:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:00,108 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 709 transitions. [2021-11-07 01:58:00,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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 01:58:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 709 transitions. [2021-11-07 01:58:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:58:00,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:00,120 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:00,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:00,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:00,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1488507908, now seen corresponding path program 1 times [2021-11-07 01:58:00,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:00,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520636601] [2021-11-07 01:58:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:00,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:00,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:00,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:00,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:58:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:00,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:58:00,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:58:01,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:01,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520636601] [2021-11-07 01:58:01,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520636601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:01,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295619817] [2021-11-07 01:58:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:01,083 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:01,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:01,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:58:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:01,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:58:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:01,635 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 01:58:01,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:01,738 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 01:58:01,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295619817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:01,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:01,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:58:01,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524596983] [2021-11-07 01:58:01,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:01,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:58:01,740 INFO L87 Difference]: Start difference. First operand 514 states and 709 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:01,843 INFO L93 Difference]: Finished difference Result 1017 states and 1405 transitions. [2021-11-07 01:58:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:01,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 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 36 [2021-11-07 01:58:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:01,848 INFO L225 Difference]: With dead ends: 1017 [2021-11-07 01:58:01,848 INFO L226 Difference]: Without dead ends: 513 [2021-11-07 01:58:01,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:58:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-07 01:58:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2021-11-07 01:58:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.376953125) internal successors, (705), 512 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 705 transitions. [2021-11-07 01:58:01,879 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 705 transitions. Word has length 36 [2021-11-07 01:58:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:01,880 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 705 transitions. [2021-11-07 01:58:01,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 705 transitions. [2021-11-07 01:58:01,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:58:01,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:01,882 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:01,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:02,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:02,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:02,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1332267002, now seen corresponding path program 1 times [2021-11-07 01:58:02,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:02,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906899011] [2021-11-07 01:58:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:02,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:02,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:02,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:58:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:02,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:58:02,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:58:03,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:03,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906899011] [2021-11-07 01:58:03,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906899011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:03,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1187032794] [2021-11-07 01:58:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:03,223 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:03,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:03,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:03,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:58:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:03,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:58:03,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:58:04,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1187032794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:04,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:04,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 01:58:04,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777108485] [2021-11-07 01:58:04,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:58:04,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:58:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:58:04,301 INFO L87 Difference]: Start difference. First operand 513 states and 705 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:04,692 INFO L93 Difference]: Finished difference Result 1517 states and 2092 transitions. [2021-11-07 01:58:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:58:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:58:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:04,700 INFO L225 Difference]: With dead ends: 1517 [2021-11-07 01:58:04,700 INFO L226 Difference]: Without dead ends: 1010 [2021-11-07 01:58:04,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:58:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-11-07 01:58:04,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 986. [2021-11-07 01:58:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.3776649746192893) internal successors, (1357), 985 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1357 transitions. [2021-11-07 01:58:04,754 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1357 transitions. Word has length 51 [2021-11-07 01:58:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:04,755 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1357 transitions. [2021-11-07 01:58:04,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:04,756 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1357 transitions. [2021-11-07 01:58:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:58:04,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:04,759 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:04,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:04,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:05,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:05,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash 535464374, now seen corresponding path program 1 times [2021-11-07 01:58:05,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:05,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999528629] [2021-11-07 01:58:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:05,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:05,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:05,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:58:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:05,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:58:05,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:58:06,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:06,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999528629] [2021-11-07 01:58:06,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999528629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:06,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:06,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:06,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234672448] [2021-11-07 01:58:06,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:06,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:06,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:06,212 INFO L87 Difference]: Start difference. First operand 986 states and 1357 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:06,341 INFO L93 Difference]: Finished difference Result 1753 states and 2417 transitions. [2021-11-07 01:58:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:58:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:06,347 INFO L225 Difference]: With dead ends: 1753 [2021-11-07 01:58:06,347 INFO L226 Difference]: Without dead ends: 777 [2021-11-07 01:58:06,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 01:58:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-11-07 01:58:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 730. [2021-11-07 01:58:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.3799725651577504) internal successors, (1006), 729 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1006 transitions. [2021-11-07 01:58:06,386 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1006 transitions. Word has length 76 [2021-11-07 01:58:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:06,387 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1006 transitions. [2021-11-07 01:58:06,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1006 transitions. [2021-11-07 01:58:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:58:06,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:06,389 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:06,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:06,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:06,607 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash -106675824, now seen corresponding path program 2 times [2021-11-07 01:58:06,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:06,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574683970] [2021-11-07 01:58:06,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:58:06,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:06,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:06,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:06,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:58:08,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:58:08,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:58:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:08,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:08,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:08,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:08,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574683970] [2021-11-07 01:58:08,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574683970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:08,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [703045484] [2021-11-07 01:58:08,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:58:08,762 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:08,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:08,767 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:08,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:58:10,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:58:10,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:58:10,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:58:10,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:11,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:11,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [703045484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:11,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:11,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:58:11,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528760759] [2021-11-07 01:58:11,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:58:11,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:58:11,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:58:11,510 INFO L87 Difference]: Start difference. First operand 730 states and 1006 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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 01:58:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:12,386 INFO L93 Difference]: Finished difference Result 1577 states and 2182 transitions. [2021-11-07 01:58:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:58:12,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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 76 [2021-11-07 01:58:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:12,393 INFO L225 Difference]: With dead ends: 1577 [2021-11-07 01:58:12,393 INFO L226 Difference]: Without dead ends: 870 [2021-11-07 01:58:12,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:58:12,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-07 01:58:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 730. [2021-11-07 01:58:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.3580246913580247) internal successors, (990), 729 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 990 transitions. [2021-11-07 01:58:12,456 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 990 transitions. Word has length 76 [2021-11-07 01:58:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:12,456 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 990 transitions. [2021-11-07 01:58:12,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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 01:58:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 990 transitions. [2021-11-07 01:58:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:58:12,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:12,459 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:12,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:12,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:12,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:12,871 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash -504091861, now seen corresponding path program 1 times [2021-11-07 01:58:12,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:12,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065146648] [2021-11-07 01:58:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:12,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:12,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:12,874 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:12,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:58:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:13,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:13,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:13,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:13,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:13,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065146648] [2021-11-07 01:58:13,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065146648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:13,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [84402025] [2021-11-07 01:58:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:13,953 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:13,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:13,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:13,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:58:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:15,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:15,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [84402025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:15,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958816910] [2021-11-07 01:58:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:15,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:58:15,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:58:15,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:58:15,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:58:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:58:15,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:16,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:17,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958816910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:17,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:58:17,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5, 5, 5] total 24 [2021-11-07 01:58:17,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122689830] [2021-11-07 01:58:17,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:58:17,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:58:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:58:17,728 INFO L87 Difference]: Start difference. First operand 730 states and 990 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:21,570 INFO L93 Difference]: Finished difference Result 2104 states and 2880 transitions. [2021-11-07 01:58:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:58:21,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:58:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:21,581 INFO L225 Difference]: With dead ends: 2104 [2021-11-07 01:58:21,581 INFO L226 Difference]: Without dead ends: 1397 [2021-11-07 01:58:21,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:58:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-11-07 01:58:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 726. [2021-11-07 01:58:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.3489655172413793) internal successors, (978), 725 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 978 transitions. [2021-11-07 01:58:21,671 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 978 transitions. Word has length 78 [2021-11-07 01:58:21,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:21,671 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 978 transitions. [2021-11-07 01:58:21,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 978 transitions. [2021-11-07 01:58:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:58:21,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:21,674 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:21,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:21,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:22,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:22,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:58:22,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1919876640, now seen corresponding path program 1 times [2021-11-07 01:58:22,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:22,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352140706] [2021-11-07 01:58:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:22,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:22,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:22,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:22,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:58:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:22,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:23,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:23,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:23,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352140706] [2021-11-07 01:58:23,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352140706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:23,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1401337906] [2021-11-07 01:58:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:23,558 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:23,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:23,570 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:23,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:58:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:24,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:24,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:25,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1401337906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:25,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613273511] [2021-11-07 01:58:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:25,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:58:25,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:58:25,173 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:58:25,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:58:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:58:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:26,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:27,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613273511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:27,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:58:27,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5, 5, 5] total 24 [2021-11-07 01:58:27,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032217070] [2021-11-07 01:58:27,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:58:27,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:27,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:58:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:58:27,618 INFO L87 Difference]: Start difference. First operand 726 states and 978 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:30,873 INFO L93 Difference]: Finished difference Result 2016 states and 2728 transitions. [2021-11-07 01:58:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:58:30,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:58:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:30,883 INFO L225 Difference]: With dead ends: 2016 [2021-11-07 01:58:30,883 INFO L226 Difference]: Without dead ends: 1313 [2021-11-07 01:58:30,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:58:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-11-07 01:58:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 718. [2021-11-07 01:58:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.3417015341701535) internal successors, (962), 717 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 962 transitions. [2021-11-07 01:58:30,969 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 962 transitions. Word has length 81 [2021-11-07 01:58:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:30,970 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 962 transitions. [2021-11-07 01:58:30,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 962 transitions. [2021-11-07 01:58:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:58:30,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:30,973 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:30,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:31,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:31,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:31,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:58:31,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash 799245474, now seen corresponding path program 1 times [2021-11-07 01:58:31,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:31,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872048050] [2021-11-07 01:58:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:31,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:31,596 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:31,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:58:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:32,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:32,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:33,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:33,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872048050] [2021-11-07 01:58:33,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872048050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:33,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412746367] [2021-11-07 01:58:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:33,126 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:33,126 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:33,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:58:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:34,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:58:34,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1412746367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:34,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038632228] [2021-11-07 01:58:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:34,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:58:34,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:58:34,891 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:58:34,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 01:58:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:58:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:35,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:36,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038632228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:36,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:58:36,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 01:58:36,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106066770] [2021-11-07 01:58:36,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:36,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:36,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:36,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:58:36,197 INFO L87 Difference]: Start difference. First operand 718 states and 962 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:50,653 INFO L93 Difference]: Finished difference Result 1425 states and 1920 transitions. [2021-11-07 01:58:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:50,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 01:58:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:50,659 INFO L225 Difference]: With dead ends: 1425 [2021-11-07 01:58:50,659 INFO L226 Difference]: Without dead ends: 730 [2021-11-07 01:58:50,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:58:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-07 01:58:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2021-11-07 01:58:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.336076817558299) internal successors, (974), 729 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 974 transitions. [2021-11-07 01:58:50,751 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 974 transitions. Word has length 92 [2021-11-07 01:58:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:50,751 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 974 transitions. [2021-11-07 01:58:50,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 974 transitions. [2021-11-07 01:58:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:58:50,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:50,754 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:50,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:50,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:51,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:51,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:51,362 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1886124263, now seen corresponding path program 1 times [2021-11-07 01:58:51,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:51,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971771308] [2021-11-07 01:58:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:51,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:51,364 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:51,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:58:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:52,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:58:52,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:58:53,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:53,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971771308] [2021-11-07 01:58:53,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971771308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:53,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [268200580] [2021-11-07 01:58:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:53,003 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:53,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:53,004 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:53,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:58:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:58:54,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:54,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:58:54,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [268200580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:54,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:54,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:58:54,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682905810] [2021-11-07 01:58:54,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:58:54,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:58:54,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:58:54,622 INFO L87 Difference]: Start difference. First operand 730 states and 974 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:59:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:13,280 INFO L93 Difference]: Finished difference Result 2060 states and 2760 transitions. [2021-11-07 01:59:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 93 [2021-11-07 01:59:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:13,291 INFO L225 Difference]: With dead ends: 2060 [2021-11-07 01:59:13,291 INFO L226 Difference]: Without dead ends: 1353 [2021-11-07 01:59:13,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:59:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-11-07 01:59:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 750. [2021-11-07 01:59:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.3377837116154874) internal successors, (1002), 749 states have internal predecessors, (1002), 0 states have call successors, (0), 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 01:59:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1002 transitions. [2021-11-07 01:59:13,419 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1002 transitions. Word has length 93 [2021-11-07 01:59:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:13,420 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1002 transitions. [2021-11-07 01:59:13,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:59:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1002 transitions. [2021-11-07 01:59:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:59:13,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:13,423 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:13,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:13,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:13,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:13,829 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1480900224, now seen corresponding path program 1 times [2021-11-07 01:59:13,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:13,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330205718] [2021-11-07 01:59:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:13,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:13,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:13,832 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:13,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:59:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:14,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:59:15,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:59:15,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:15,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330205718] [2021-11-07 01:59:15,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330205718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:15,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149871671] [2021-11-07 01:59:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:15,608 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:15,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:15,609 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:15,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:59:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:17,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:59:17,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:59:17,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149871671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:17,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670571047] [2021-11-07 01:59:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:17,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:17,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:59:17,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:59:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 01:59:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:19,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:59:19,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:59:20,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670571047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:20,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:59:20,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 01:59:20,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398542372] [2021-11-07 01:59:20,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:59:20,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:59:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:59:20,315 INFO L87 Difference]: Start difference. First operand 750 states and 1002 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 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 01:59:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:24,585 INFO L93 Difference]: Finished difference Result 5841 states and 7836 transitions. [2021-11-07 01:59:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:59:24,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 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 94 [2021-11-07 01:59:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:24,620 INFO L225 Difference]: With dead ends: 5841 [2021-11-07 01:59:24,621 INFO L226 Difference]: Without dead ends: 5460 [2021-11-07 01:59:24,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:59:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5460 states. [2021-11-07 01:59:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5460 to 2226. [2021-11-07 01:59:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 1.3420224719101124) internal successors, (2986), 2225 states have internal predecessors, (2986), 0 states have call successors, (0), 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 01:59:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 2986 transitions. [2021-11-07 01:59:25,032 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 2986 transitions. Word has length 94 [2021-11-07 01:59:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:25,032 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 2986 transitions. [2021-11-07 01:59:25,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 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 01:59:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 2986 transitions. [2021-11-07 01:59:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:59:25,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:25,055 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:25,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:25,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:25,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:25,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:25,665 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:25,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2086670527, now seen corresponding path program 1 times [2021-11-07 01:59:25,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:25,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118300608] [2021-11-07 01:59:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:25,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:25,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:25,670 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:25,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:59:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:26,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:59:27,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:59:27,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:27,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118300608] [2021-11-07 01:59:27,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118300608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:27,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794235875] [2021-11-07 01:59:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:27,644 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:27,644 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:27,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:59:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:29,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:59:29,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:59:29,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794235875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:29,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:59:29,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:59:29,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632986352] [2021-11-07 01:59:29,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:29,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:29,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:59:29,643 INFO L87 Difference]: Start difference. First operand 2226 states and 2986 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:59:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:31,151 INFO L93 Difference]: Finished difference Result 12230 states and 16396 transitions. [2021-11-07 01:59:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:59:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 96 [2021-11-07 01:59:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:31,203 INFO L225 Difference]: With dead ends: 12230 [2021-11-07 01:59:31,203 INFO L226 Difference]: Without dead ends: 10027 [2021-11-07 01:59:31,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:59:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-11-07 01:59:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 2414. [2021-11-07 01:59:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 1.3518441773725653) internal successors, (3262), 2413 states have internal predecessors, (3262), 0 states have call successors, (0), 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 01:59:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3262 transitions. [2021-11-07 01:59:31,711 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3262 transitions. Word has length 96 [2021-11-07 01:59:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:31,712 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 3262 transitions. [2021-11-07 01:59:31,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:59:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3262 transitions. [2021-11-07 01:59:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:59:31,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:31,716 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:31,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:31,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:32,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:32,123 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:32,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash -776781464, now seen corresponding path program 1 times [2021-11-07 01:59:32,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:32,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270686091] [2021-11-07 01:59:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:32,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:32,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:32,126 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:32,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:59:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:33,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:59:33,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:59:34,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:34,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270686091] [2021-11-07 01:59:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270686091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:34,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1873312164] [2021-11-07 01:59:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:34,220 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:34,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:34,221 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:34,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:59:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:36,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:59:36,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:59:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1873312164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:36,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665781919] [2021-11-07 01:59:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:36,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:36,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:59:36,766 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:59:36,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 01:59:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:38,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:59:38,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:59:38,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:59:38,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665781919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:38,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:59:38,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-07 01:59:38,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356292773] [2021-11-07 01:59:38,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:59:38,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:59:38,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:59:38,880 INFO L87 Difference]: Start difference. First operand 2414 states and 3262 transitions. Second operand has 14 states, 14 states have (on average 11.428571428571429) internal successors, (160), 14 states have internal predecessors, (160), 0 states have call successors, (0), 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 01:59:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:55,146 INFO L93 Difference]: Finished difference Result 6536 states and 8826 transitions. [2021-11-07 01:59:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:59:55,147 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.428571428571429) internal successors, (160), 14 states have internal predecessors, (160), 0 states have call successors, (0), 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 98 [2021-11-07 01:59:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:55,168 INFO L225 Difference]: With dead ends: 6536 [2021-11-07 01:59:55,168 INFO L226 Difference]: Without dead ends: 4145 [2021-11-07 01:59:55,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:59:55,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4145 states. [2021-11-07 01:59:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4145 to 2522. [2021-11-07 01:59:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 1.3462911543038476) internal successors, (3394), 2521 states have internal predecessors, (3394), 0 states have call successors, (0), 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 01:59:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3394 transitions. [2021-11-07 01:59:55,636 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3394 transitions. Word has length 98 [2021-11-07 01:59:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:55,637 INFO L470 AbstractCegarLoop]: Abstraction has 2522 states and 3394 transitions. [2021-11-07 01:59:55,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.428571428571429) internal successors, (160), 14 states have internal predecessors, (160), 0 states have call successors, (0), 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 01:59:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3394 transitions. [2021-11-07 01:59:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 01:59:55,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:55,641 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:55,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:55,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-07 01:59:56,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 01:59:56,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:56,252 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash -365518011, now seen corresponding path program 2 times [2021-11-07 01:59:56,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:56,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310326660] [2021-11-07 01:59:56,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:59:56,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:56,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:56,254 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:56,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:59:58,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:59:58,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:59:58,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:59:58,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:59:59,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:59:59,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:59,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310326660] [2021-11-07 01:59:59,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310326660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:59,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [443730174] [2021-11-07 01:59:59,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:59:59,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:59,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:59,842 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:59,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 02:00:03,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:00:03,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:00:03,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:00:03,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:00:03,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:00:04,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [443730174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:04,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136878754] [2021-11-07 02:00:04,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:00:04,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:00:04,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:00:04,259 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:00:04,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 02:00:06,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:00:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:00:06,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:00:06,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-07 02:00:06,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-07 02:00:07,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136878754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:07,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:00:07,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 4, 4] total 20 [2021-11-07 02:00:07,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096548718] [2021-11-07 02:00:07,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 02:00:07,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:07,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 02:00:07,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:00:07,579 INFO L87 Difference]: Start difference. First operand 2522 states and 3394 transitions. Second operand has 20 states, 20 states have (on average 9.4) internal successors, (188), 20 states have internal predecessors, (188), 0 states have call successors, (0), 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 02:00:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:21,379 INFO L93 Difference]: Finished difference Result 5093 states and 6880 transitions. [2021-11-07 02:00:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:00:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.4) internal successors, (188), 20 states have internal predecessors, (188), 0 states have call successors, (0), 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 115 [2021-11-07 02:00:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:21,386 INFO L225 Difference]: With dead ends: 5093 [2021-11-07 02:00:21,386 INFO L226 Difference]: Without dead ends: 2594 [2021-11-07 02:00:21,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:00:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-11-07 02:00:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2021-11-07 02:00:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 1.3413035094485153) internal successors, (3478), 2593 states have internal predecessors, (3478), 0 states have call successors, (0), 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 02:00:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3478 transitions. [2021-11-07 02:00:21,817 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3478 transitions. Word has length 115 [2021-11-07 02:00:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:21,817 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 3478 transitions. [2021-11-07 02:00:21,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.4) internal successors, (188), 20 states have internal predecessors, (188), 0 states have call successors, (0), 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 02:00:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3478 transitions. [2021-11-07 02:00:21,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 02:00:21,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:21,822 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:21,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:22,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-07 02:00:22,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:22,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:22,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1351976489, now seen corresponding path program 3 times [2021-11-07 02:00:22,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:22,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86660865] [2021-11-07 02:00:22,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:00:22,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:22,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:22,438 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:22,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 02:00:28,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 02:00:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:00:29,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:00:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-07 02:00:29,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-07 02:00:30,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:30,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86660865] [2021-11-07 02:00:30,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86660865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:30,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [999584588] [2021-11-07 02:00:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:00:30,028 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:30,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:00:30,030 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:00:30,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 02:01:22,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 02:01:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:01:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 02:01:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:23,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:23,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-07 02:01:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:23,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-07 02:01:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:01:24,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 25 [2021-11-07 02:01:24,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 25 [2021-11-07 02:01:24,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 224 [2021-11-07 02:01:24,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 209 [2021-11-07 02:01:24,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 160 [2021-11-07 02:01:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 88 [2021-11-07 02:01:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:24,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 97 [2021-11-07 02:01:24,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:01:24,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 88 [2021-11-07 02:01:24,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:01:24,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 70 [2021-11-07 02:01:24,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:01:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 36 [2021-11-07 02:01:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-07 02:01:24,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-07 02:01:25,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [999584588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:25,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886353385] [2021-11-07 02:01:25,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:01:25,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:01:25,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:01:25,352 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:01:25,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3b7c94-0eae-4ad6-b63a-3af1760ff108/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process