./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.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_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/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_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/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_10a70620-2537-4625-bd14-80548eb0b650/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 1848e360a16ec6531e7d7aea690ab68ac7295c6b0bdec191a41fa9ee0518b66d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:20,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:20,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:20,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:20,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:20,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:20,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:20,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:20,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:20,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:20,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:20,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:20,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:20,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:20,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:20,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:20,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:20,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:20,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:20,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:20,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:20,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:20,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:20,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:20,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:20,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:20,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:20,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:20,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:20,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:20,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:20,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:20,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:20,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:20,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:20,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:20,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:20,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:20,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:20,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:20,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:20,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:25:20,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:20,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:20,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:20,558 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:20,558 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:20,558 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:20,558 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:20,559 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:20,559 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:20,559 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:20,567 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:20,567 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:20,568 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:20,568 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:20,568 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:20,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:20,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:20,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:20,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:20,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:20,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:20,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:20,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:20,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:20,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:20,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:20,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:20,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:20,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:20,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:20,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:20,579 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:20,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:20,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:20,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:20,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:20,580 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_10a70620-2537-4625-bd14-80548eb0b650/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1848e360a16ec6531e7d7aea690ab68ac7295c6b0bdec191a41fa9ee0518b66d [2021-11-07 01:25:20,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:20,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:20,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:20,879 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:20,880 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:20,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i [2021-11-07 01:25:20,978 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data/4f3483115/a2132fddd29c41c5938bd6781da11945/FLAG032ecf7f6 [2021-11-07 01:25:22,198 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:22,199 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i [2021-11-07 01:25:22,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data/4f3483115/a2132fddd29c41c5938bd6781da11945/FLAG032ecf7f6 [2021-11-07 01:25:22,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data/4f3483115/a2132fddd29c41c5938bd6781da11945 [2021-11-07 01:25:22,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:22,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:22,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:22,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:22,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:22,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:22" (1/1) ... [2021-11-07 01:25:22,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7708612c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:22, skipping insertion in model container [2021-11-07 01:25:22,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:22" (1/1) ... [2021-11-07 01:25:22,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:22,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:24,030 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_10a70620-2537-4625-bd14-80548eb0b650/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i[196736,196749] [2021-11-07 01:25:24,446 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:24,530 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:24,802 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:24,813 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:24,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:25,006 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:25:25,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@685ebc8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:25, skipping insertion in model container [2021-11-07 01:25:25,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:25,007 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:25:25,010 INFO L168 Benchmark]: Toolchain (without parser) took 2513.38 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 59.6 MB in the beginning and 85.3 MB in the end (delta: -25.7 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:25,011 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 58.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:25,013 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2496.18 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 59.4 MB in the beginning and 85.6 MB in the end (delta: -26.1 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:25,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 58.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2496.18 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 59.4 MB in the beginning and 85.6 MB in the end (delta: -26.1 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7049]: 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_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/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_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/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_10a70620-2537-4625-bd14-80548eb0b650/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 1848e360a16ec6531e7d7aea690ab68ac7295c6b0bdec191a41fa9ee0518b66d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:27,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:27,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:27,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:27,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:27,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:27,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:27,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:27,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:27,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:27,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:27,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:27,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:27,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:27,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:27,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:27,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:27,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:27,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:27,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:27,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:27,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:27,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:27,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:27,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:27,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:27,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:27,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:27,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:27,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:27,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:27,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:27,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:27,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:27,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:27,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:27,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:27,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:27,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:27,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:27,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:27,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:25:27,758 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:27,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:27,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:27,763 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:27,763 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:27,764 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:27,764 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:27,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:27,764 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:27,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:27,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:27,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:27,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:27,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:27,769 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:27,769 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:25:27,769 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:25:27,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:27,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:27,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:27,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:27,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:25:27,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:27,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:27,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:27,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:27,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:27,772 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:25:27,773 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:27,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:27,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:27,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:27,774 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_10a70620-2537-4625-bd14-80548eb0b650/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1848e360a16ec6531e7d7aea690ab68ac7295c6b0bdec191a41fa9ee0518b66d [2021-11-07 01:25:28,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:28,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:28,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:28,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:28,345 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:28,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i [2021-11-07 01:25:28,427 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data/8c970eb40/222d4bc14d0f414c84aec9a437d70a92/FLAG3d1c1458d [2021-11-07 01:25:29,427 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:29,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i [2021-11-07 01:25:29,490 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data/8c970eb40/222d4bc14d0f414c84aec9a437d70a92/FLAG3d1c1458d [2021-11-07 01:25:29,840 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/data/8c970eb40/222d4bc14d0f414c84aec9a437d70a92 [2021-11-07 01:25:29,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:29,845 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:29,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:29,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:29,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:29,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:29" (1/1) ... [2021-11-07 01:25:29,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f926539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:29, skipping insertion in model container [2021-11-07 01:25:29,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:29" (1/1) ... [2021-11-07 01:25:29,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:30,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:31,335 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_10a70620-2537-4625-bd14-80548eb0b650/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i[196736,196749] [2021-11-07 01:25:32,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:32,332 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:25:32,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:32,594 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_10a70620-2537-4625-bd14-80548eb0b650/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i[196736,196749] [2021-11-07 01:25:32,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:32,858 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:33,071 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_10a70620-2537-4625-bd14-80548eb0b650/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i[196736,196749] [2021-11-07 01:25:33,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:33,387 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:33,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33 WrapperNode [2021-11-07 01:25:33,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:33,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:33,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:33,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:33,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:33,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:33,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:33,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:33,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:34,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:34,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:34,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:34,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:34,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:34,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:34,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:34,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:34,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:34,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:34,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:34,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:25:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:25:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:25:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:25:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:25:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:25:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_init_dvb [2021-11-07 01:25:34,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_init_dvb [2021-11-07 01:25:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 01:25:34,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 01:25:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_sec_feed [2021-11-07 01:25:34,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_sec_feed [2021-11-07 01:25:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2021-11-07 01:25:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2021-11-07 01:25:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_process_urb [2021-11-07 01:25:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_process_urb [2021-11-07 01:25:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:25:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_feed [2021-11-07 01:25:34,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_feed [2021-11-07 01:25:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:25:34,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:25:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:25:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:25:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:25:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:25:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_probe [2021-11-07 01:25:34,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_probe [2021-11-07 01:25:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:25:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:25:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:25:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:25:34,757 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_ts_feed [2021-11-07 01:25:34,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_ts_feed [2021-11-07 01:25:34,757 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_dvb [2021-11-07 01:25:34,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_dvb [2021-11-07 01:25:34,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-07 01:25:34,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-07 01:25:34,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2021-11-07 01:25:34,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2021-11-07 01:25:34,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-11-07 01:25:34,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-11-07 01:25:34,759 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_7 [2021-11-07 01:25:34,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_7 [2021-11-07 01:25:34,759 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 01:25:34,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 01:25:34,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:25:34,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:25:34,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:25:34,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:25:34,760 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 01:25:34,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 01:25:34,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:25:34,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:25:34,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:25:34,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:25:34,762 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:25:34,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:25:34,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:25:34,762 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_init_rc [2021-11-07 01:25:34,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_init_rc [2021-11-07 01:25:34,763 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_disconnect [2021-11-07 01:25:34,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_disconnect [2021-11-07 01:25:34,763 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_handle_irq [2021-11-07 01:25:34,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_handle_irq [2021-11-07 01:25:34,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:25:34,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:34,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:28:46,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:28:46,183 INFO L299 CfgBuilder]: Removed 1159 assume(true) statements. [2021-11-07 01:28:46,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:46 BoogieIcfgContainer [2021-11-07 01:28:46,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:28:46,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:28:46,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:28:46,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:28:46,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:29" (1/3) ... [2021-11-07 01:28:46,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b80092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:46, skipping insertion in model container [2021-11-07 01:28:46,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (2/3) ... [2021-11-07 01:28:46,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b80092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:46, skipping insertion in model container [2021-11-07 01:28:46,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:46" (3/3) ... [2021-11-07 01:28:46,198 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-entry_point.cil.out.i [2021-11-07 01:28:46,204 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:28:46,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:28:46,283 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:28:46,289 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 01:28:46,293 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:28:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 1556 states, 1500 states have (on average 1.4353333333333333) internal successors, (2153), 1508 states have internal predecessors, (2153), 31 states have call successors, (31), 19 states have call predecessors, (31), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-07 01:28:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:28:46,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:46,353 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] [2021-11-07 01:28:46,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:28:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:46,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1596431133, now seen corresponding path program 1 times [2021-11-07 01:28:46,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:46,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19576575] [2021-11-07 01:28:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:46,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:46,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:46,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:46,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:28:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:49,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:28:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:49,727 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 01:28:49,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:49,995 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 01:28:49,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:49,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19576575] [2021-11-07 01:28:49,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19576575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:49,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:49,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:28:49,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352493983] [2021-11-07 01:28:50,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:50,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:50,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:50,021 INFO L87 Difference]: Start difference. First operand has 1556 states, 1500 states have (on average 1.4353333333333333) internal successors, (2153), 1508 states have internal predecessors, (2153), 31 states have call successors, (31), 19 states have call predecessors, (31), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:50,290 INFO L93 Difference]: Finished difference Result 3108 states and 4456 transitions. [2021-11-07 01:28:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:28:50,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:28:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:50,316 INFO L225 Difference]: With dead ends: 3108 [2021-11-07 01:28:50,316 INFO L226 Difference]: Without dead ends: 1544 [2021-11-07 01:28:50,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-11-07 01:28:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2021-11-07 01:28:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1489 states have (on average 1.4083277367360645) internal successors, (2097), 1496 states have internal predecessors, (2097), 31 states have call successors, (31), 19 states have call predecessors, (31), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-07 01:28:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2159 transitions. [2021-11-07 01:28:50,486 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2159 transitions. Word has length 25 [2021-11-07 01:28:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:50,487 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 2159 transitions. [2021-11-07 01:28:50,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2159 transitions. [2021-11-07 01:28:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:28:50,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:50,489 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] [2021-11-07 01:28:50,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:50,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:50,702 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:28:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash 749935913, now seen corresponding path program 1 times [2021-11-07 01:28:50,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:50,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155798002] [2021-11-07 01:28:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:50,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:50,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:50,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:50,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:28:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:53,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:28:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:53,760 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 01:28:53,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:54,021 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 01:28:54,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:54,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155798002] [2021-11-07 01:28:54,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155798002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:54,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:54,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:28:54,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161250170] [2021-11-07 01:28:54,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:54,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:54,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:54,025 INFO L87 Difference]: Start difference. First operand 1544 states and 2159 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:57,741 INFO L93 Difference]: Finished difference Result 6028 states and 8467 transitions. [2021-11-07 01:28:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:28:57,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 01:28:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:57,776 INFO L225 Difference]: With dead ends: 6028 [2021-11-07 01:28:57,777 INFO L226 Difference]: Without dead ends: 4515 [2021-11-07 01:28:57,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 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 01:28:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4515 states. [2021-11-07 01:28:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4515 to 4515. [2021-11-07 01:28:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4515 states, 4360 states have (on average 1.411697247706422) internal successors, (6155), 4373 states have internal predecessors, (6155), 93 states have call successors, (93), 57 states have call predecessors, (93), 57 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-07 01:28:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4515 states to 4515 states and 6341 transitions. [2021-11-07 01:28:57,993 INFO L78 Accepts]: Start accepts. Automaton has 4515 states and 6341 transitions. Word has length 26 [2021-11-07 01:28:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:57,993 INFO L470 AbstractCegarLoop]: Abstraction has 4515 states and 6341 transitions. [2021-11-07 01:28:57,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4515 states and 6341 transitions. [2021-11-07 01:28:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:28:58,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:58,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:58,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:58,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:58,227 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:28:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash 393012970, now seen corresponding path program 1 times [2021-11-07 01:28:58,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:58,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897381449] [2021-11-07 01:28:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:58,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:58,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:58,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:58,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:29:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:01,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:01,181 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 01:29:01,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:01,285 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 01:29:01,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:01,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897381449] [2021-11-07 01:29:01,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897381449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:01,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:01,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:01,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002567751] [2021-11-07 01:29:01,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:01,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:01,288 INFO L87 Difference]: Start difference. First operand 4515 states and 6341 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:01,726 INFO L93 Difference]: Finished difference Result 4545 states and 6369 transitions. [2021-11-07 01:29:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:01,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:29:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:01,766 INFO L225 Difference]: With dead ends: 4545 [2021-11-07 01:29:01,766 INFO L226 Difference]: Without dead ends: 4530 [2021-11-07 01:29:01,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 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 01:29:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4530 states. [2021-11-07 01:29:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4530 to 4515. [2021-11-07 01:29:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4515 states, 4360 states have (on average 1.411467889908257) internal successors, (6154), 4373 states have internal predecessors, (6154), 93 states have call successors, (93), 57 states have call predecessors, (93), 57 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-07 01:29:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4515 states to 4515 states and 6340 transitions. [2021-11-07 01:29:02,000 INFO L78 Accepts]: Start accepts. Automaton has 4515 states and 6340 transitions. Word has length 33 [2021-11-07 01:29:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:02,001 INFO L470 AbstractCegarLoop]: Abstraction has 4515 states and 6340 transitions. [2021-11-07 01:29:02,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4515 states and 6340 transitions. [2021-11-07 01:29:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:29:02,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:02,004 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:02,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:02,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:02,227 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash 393072552, now seen corresponding path program 1 times [2021-11-07 01:29:02,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:02,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418041871] [2021-11-07 01:29:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:02,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:02,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:02,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:29:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:29:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:06,416 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 01:29:06,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:07,203 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 01:29:07,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:07,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418041871] [2021-11-07 01:29:07,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418041871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:07,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:07,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:29:07,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525268633] [2021-11-07 01:29:07,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:07,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:07,205 INFO L87 Difference]: Start difference. First operand 4515 states and 6340 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:29:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:08,467 INFO L93 Difference]: Finished difference Result 13481 states and 19317 transitions. [2021-11-07 01:29:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:29:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 33 [2021-11-07 01:29:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:08,541 INFO L225 Difference]: With dead ends: 13481 [2021-11-07 01:29:08,541 INFO L226 Difference]: Without dead ends: 8997 [2021-11-07 01:29:08,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8997 states. [2021-11-07 01:29:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8997 to 8985. [2021-11-07 01:29:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8985 states, 8680 states have (on average 1.4104838709677419) internal successors, (12243), 8702 states have internal predecessors, (12243), 186 states have call successors, (186), 114 states have call predecessors, (186), 114 states have return successors, (372), 174 states have call predecessors, (372), 186 states have call successors, (372) [2021-11-07 01:29:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8985 states to 8985 states and 12801 transitions. [2021-11-07 01:29:09,063 INFO L78 Accepts]: Start accepts. Automaton has 8985 states and 12801 transitions. Word has length 33 [2021-11-07 01:29:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:09,063 INFO L470 AbstractCegarLoop]: Abstraction has 8985 states and 12801 transitions. [2021-11-07 01:29:09,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:29:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8985 states and 12801 transitions. [2021-11-07 01:29:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:29:09,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:09,068 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:09,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:09,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:09,281 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash -699649290, now seen corresponding path program 1 times [2021-11-07 01:29:09,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:09,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076373089] [2021-11-07 01:29:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:09,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:09,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:09,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:09,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:29:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:29:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:13,393 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 01:29:13,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:14,226 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 01:29:14,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:14,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076373089] [2021-11-07 01:29:14,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076373089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:14,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:14,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:29:14,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984415345] [2021-11-07 01:29:14,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:14,229 INFO L87 Difference]: Start difference. First operand 8985 states and 12801 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:29:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:14,853 INFO L93 Difference]: Finished difference Result 8985 states and 12801 transitions. [2021-11-07 01:29:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:29:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:14,918 INFO L225 Difference]: With dead ends: 8985 [2021-11-07 01:29:14,918 INFO L226 Difference]: Without dead ends: 8983 [2021-11-07 01:29:14,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8983 states. [2021-11-07 01:29:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8983 to 8983. [2021-11-07 01:29:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8679 states have (on average 1.4104159465376196) internal successors, (12241), 8700 states have internal predecessors, (12241), 186 states have call successors, (186), 114 states have call predecessors, (186), 114 states have return successors, (372), 174 states have call predecessors, (372), 186 states have call successors, (372) [2021-11-07 01:29:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 12799 transitions. [2021-11-07 01:29:15,456 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 12799 transitions. Word has length 34 [2021-11-07 01:29:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:15,456 INFO L470 AbstractCegarLoop]: Abstraction has 8983 states and 12799 transitions. [2021-11-07 01:29:15,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:29:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 12799 transitions. [2021-11-07 01:29:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:29:15,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:15,458 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:15,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:15,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:15,679 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash -214288014, now seen corresponding path program 1 times [2021-11-07 01:29:15,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:15,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241725667] [2021-11-07 01:29:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:15,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:15,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:15,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:15,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:29:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:18,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:19,054 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 01:29:19,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:19,691 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 01:29:19,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:19,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241725667] [2021-11-07 01:29:19,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241725667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:19,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:19,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:29:19,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021960726] [2021-11-07 01:29:19,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:19,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:19,693 INFO L87 Difference]: Start difference. First operand 8983 states and 12799 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:20,059 INFO L93 Difference]: Finished difference Result 8983 states and 12799 transitions. [2021-11-07 01:29:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:29:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:20,105 INFO L225 Difference]: With dead ends: 8983 [2021-11-07 01:29:20,106 INFO L226 Difference]: Without dead ends: 8981 [2021-11-07 01:29:20,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 01:29:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8981 states. [2021-11-07 01:29:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8981 to 8981. [2021-11-07 01:29:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8981 states, 8678 states have (on average 1.4103480064530998) internal successors, (12239), 8698 states have internal predecessors, (12239), 186 states have call successors, (186), 114 states have call predecessors, (186), 114 states have return successors, (372), 174 states have call predecessors, (372), 186 states have call successors, (372) [2021-11-07 01:29:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8981 states to 8981 states and 12797 transitions. [2021-11-07 01:29:20,597 INFO L78 Accepts]: Start accepts. Automaton has 8981 states and 12797 transitions. Word has length 35 [2021-11-07 01:29:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:20,597 INFO L470 AbstractCegarLoop]: Abstraction has 8981 states and 12797 transitions. [2021-11-07 01:29:20,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 8981 states and 12797 transitions. [2021-11-07 01:29:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:29:20,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:20,599 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:20,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:20,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:20,815 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:20,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1947009664, now seen corresponding path program 1 times [2021-11-07 01:29:20,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:20,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614002929] [2021-11-07 01:29:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:20,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:20,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:20,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:29:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:24,334 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 01:29:24,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:25,023 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 01:29:25,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:25,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614002929] [2021-11-07 01:29:25,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614002929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:25,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:25,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:29:25,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485625059] [2021-11-07 01:29:25,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:25,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:25,025 INFO L87 Difference]: Start difference. First operand 8981 states and 12797 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:25,362 INFO L93 Difference]: Finished difference Result 8981 states and 12797 transitions. [2021-11-07 01:29:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:25,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 01:29:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:25,401 INFO L225 Difference]: With dead ends: 8981 [2021-11-07 01:29:25,401 INFO L226 Difference]: Without dead ends: 8979 [2021-11-07 01:29:25,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 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 01:29:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8979 states. [2021-11-07 01:29:25,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8979 to 8979. [2021-11-07 01:29:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8979 states, 8677 states have (on average 1.4102800507087703) internal successors, (12237), 8696 states have internal predecessors, (12237), 186 states have call successors, (186), 114 states have call predecessors, (186), 114 states have return successors, (372), 174 states have call predecessors, (372), 186 states have call successors, (372) [2021-11-07 01:29:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8979 states to 8979 states and 12795 transitions. [2021-11-07 01:29:25,914 INFO L78 Accepts]: Start accepts. Automaton has 8979 states and 12795 transitions. Word has length 36 [2021-11-07 01:29:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:25,914 INFO L470 AbstractCegarLoop]: Abstraction has 8979 states and 12795 transitions. [2021-11-07 01:29:25,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8979 states and 12795 transitions. [2021-11-07 01:29:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:29:25,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:25,918 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:25,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:26,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:26,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash 227760956, now seen corresponding path program 1 times [2021-11-07 01:29:26,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:26,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625202957] [2021-11-07 01:29:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:26,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:26,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:26,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:29:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:28,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:29,504 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 01:29:29,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:30,177 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 01:29:30,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:30,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625202957] [2021-11-07 01:29:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625202957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:30,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:30,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:29:30,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932889348] [2021-11-07 01:29:30,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:30,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:30,181 INFO L87 Difference]: Start difference. First operand 8979 states and 12795 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:30,441 INFO L93 Difference]: Finished difference Result 8979 states and 12795 transitions. [2021-11-07 01:29:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 01:29:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:30,467 INFO L225 Difference]: With dead ends: 8979 [2021-11-07 01:29:30,467 INFO L226 Difference]: Without dead ends: 8970 [2021-11-07 01:29:30,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 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 01:29:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8970 states. [2021-11-07 01:29:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8970 to 8970. [2021-11-07 01:29:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8970 states, 8669 states have (on average 1.4103126081439612) internal successors, (12226), 8687 states have internal predecessors, (12226), 186 states have call successors, (186), 114 states have call predecessors, (186), 114 states have return successors, (372), 174 states have call predecessors, (372), 186 states have call successors, (372) [2021-11-07 01:29:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8970 states to 8970 states and 12784 transitions. [2021-11-07 01:29:31,048 INFO L78 Accepts]: Start accepts. Automaton has 8970 states and 12784 transitions. Word has length 37 [2021-11-07 01:29:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:31,049 INFO L470 AbstractCegarLoop]: Abstraction has 8970 states and 12784 transitions. [2021-11-07 01:29:31,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 8970 states and 12784 transitions. [2021-11-07 01:29:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:29:31,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:31,055 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:31,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:31,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:31,279 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1031632269, now seen corresponding path program 1 times [2021-11-07 01:29:31,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:31,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18438041] [2021-11-07 01:29:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:31,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:31,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:31,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:31,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:29:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:34,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:29:35,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:29:35,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:35,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18438041] [2021-11-07 01:29:35,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18438041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:35,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:35,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:35,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477859945] [2021-11-07 01:29:35,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:35,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:35,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:35,667 INFO L87 Difference]: Start difference. First operand 8970 states and 12784 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:29:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:36,386 INFO L93 Difference]: Finished difference Result 18293 states and 26085 transitions. [2021-11-07 01:29:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2021-11-07 01:29:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:36,415 INFO L225 Difference]: With dead ends: 18293 [2021-11-07 01:29:36,415 INFO L226 Difference]: Without dead ends: 9354 [2021-11-07 01:29:36,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 01:29:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9354 states. [2021-11-07 01:29:36,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9354 to 9283. [2021-11-07 01:29:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 8982 states have (on average 1.411266978401247) internal successors, (12676), 9000 states have internal predecessors, (12676), 186 states have call successors, (186), 114 states have call predecessors, (186), 114 states have return successors, (372), 174 states have call predecessors, (372), 186 states have call successors, (372) [2021-11-07 01:29:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 13234 transitions. [2021-11-07 01:29:36,898 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 13234 transitions. Word has length 83 [2021-11-07 01:29:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:36,899 INFO L470 AbstractCegarLoop]: Abstraction has 9283 states and 13234 transitions. [2021-11-07 01:29:36,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:29:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 13234 transitions. [2021-11-07 01:29:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:29:36,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:36,903 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:36,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 01:29:37,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:37,127 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash 649591972, now seen corresponding path program 1 times [2021-11-07 01:29:37,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:37,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276129026] [2021-11-07 01:29:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:37,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:37,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:37,132 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:37,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:29:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:40,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:40,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:29:41,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:29:43,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:43,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276129026] [2021-11-07 01:29:43,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276129026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:43,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:43,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-07 01:29:43,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813395457] [2021-11-07 01:29:43,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:43,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:43,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:43,249 INFO L87 Difference]: Start difference. First operand 9283 states and 13234 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:29:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:48,118 INFO L93 Difference]: Finished difference Result 18120 states and 26222 transitions. [2021-11-07 01:29:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 91 [2021-11-07 01:29:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:48,162 INFO L225 Difference]: With dead ends: 18120 [2021-11-07 01:29:48,162 INFO L226 Difference]: Without dead ends: 8868 [2021-11-07 01:29:48,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8868 states. [2021-11-07 01:29:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8868 to 8868. [2021-11-07 01:29:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8567 states have (on average 1.3505311077389985) internal successors, (11570), 8585 states have internal predecessors, (11570), 186 states have call successors, (186), 114 states have call predecessors, (186), 114 states have return successors, (372), 174 states have call predecessors, (372), 186 states have call successors, (372) [2021-11-07 01:29:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 12128 transitions. [2021-11-07 01:29:48,824 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 12128 transitions. Word has length 91 [2021-11-07 01:29:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:48,824 INFO L470 AbstractCegarLoop]: Abstraction has 8868 states and 12128 transitions. [2021-11-07 01:29:48,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:29:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 12128 transitions. [2021-11-07 01:29:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:29:48,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:48,829 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:48,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:49,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:49,043 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash 249487144, now seen corresponding path program 1 times [2021-11-07 01:29:49,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:49,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079885378] [2021-11-07 01:29:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:49,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:49,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:49,048 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:49,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:29:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:52,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:29:52,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:29:53,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:53,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079885378] [2021-11-07 01:29:53,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079885378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:53,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:53,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:53,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356700497] [2021-11-07 01:29:53,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:53,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:53,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:53,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:53,763 INFO L87 Difference]: Start difference. First operand 8868 states and 12128 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:29:55,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:55,692 INFO L93 Difference]: Finished difference Result 20687 states and 28794 transitions. [2021-11-07 01:29:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:29:55,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-11-07 01:29:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:55,747 INFO L225 Difference]: With dead ends: 20687 [2021-11-07 01:29:55,747 INFO L226 Difference]: Without dead ends: 11838 [2021-11-07 01:29:55,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:29:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11838 states. [2021-11-07 01:29:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11838 to 8868. [2021-11-07 01:29:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8567 states have (on average 1.3498307458853742) internal successors, (11564), 8585 states have internal predecessors, (11564), 186 states have call successors, (186), 114 states have call predecessors, (186), 114 states have return successors, (372), 174 states have call predecessors, (372), 186 states have call successors, (372) [2021-11-07 01:29:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 12122 transitions. [2021-11-07 01:29:56,382 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 12122 transitions. Word has length 91 [2021-11-07 01:29:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:56,382 INFO L470 AbstractCegarLoop]: Abstraction has 8868 states and 12122 transitions. [2021-11-07 01:29:56,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:29:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 12122 transitions. [2021-11-07 01:29:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:29:56,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:56,392 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:56,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:56,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:56,615 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1921038164, now seen corresponding path program 1 times [2021-11-07 01:29:56,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:56,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478296785] [2021-11-07 01:29:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:56,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:56,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:56,618 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:56,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:29:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1452 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:29:59,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:01,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:02,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:02,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478296785] [2021-11-07 01:30:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478296785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:02,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:02,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:30:02,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128310379] [2021-11-07 01:30:02,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:30:02,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:30:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:30:02,747 INFO L87 Difference]: Start difference. First operand 8868 states and 12122 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:07,907 INFO L93 Difference]: Finished difference Result 21083 states and 29364 transitions. [2021-11-07 01:30:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:30:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-11-07 01:30:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:07,980 INFO L225 Difference]: With dead ends: 21083 [2021-11-07 01:30:07,980 INFO L226 Difference]: Without dead ends: 12246 [2021-11-07 01:30:08,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:30:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12246 states. [2021-11-07 01:30:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12246 to 8910. [2021-11-07 01:30:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8910 states, 8603 states have (on average 1.3483668487736835) internal successors, (11600), 8627 states have internal predecessors, (11600), 186 states have call successors, (186), 114 states have call predecessors, (186), 120 states have return successors, (384), 174 states have call predecessors, (384), 186 states have call successors, (384) [2021-11-07 01:30:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8910 states to 8910 states and 12170 transitions. [2021-11-07 01:30:08,694 INFO L78 Accepts]: Start accepts. Automaton has 8910 states and 12170 transitions. Word has length 93 [2021-11-07 01:30:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:08,694 INFO L470 AbstractCegarLoop]: Abstraction has 8910 states and 12170 transitions. [2021-11-07 01:30:08,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 8910 states and 12170 transitions. [2021-11-07 01:30:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:30:08,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:08,700 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:08,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:08,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:08,915 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash 708072816, now seen corresponding path program 1 times [2021-11-07 01:30:08,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:08,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641236470] [2021-11-07 01:30:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:08,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:08,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:08,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:08,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:30:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:12,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:30:12,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:12,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:13,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:13,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641236470] [2021-11-07 01:30:13,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641236470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:13,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:13,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:13,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214263907] [2021-11-07 01:30:13,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:13,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:13,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:13,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:13,445 INFO L87 Difference]: Start difference. First operand 8910 states and 12170 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:14,692 INFO L93 Difference]: Finished difference Result 17789 states and 24675 transitions. [2021-11-07 01:30:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:14,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-11-07 01:30:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:14,737 INFO L225 Difference]: With dead ends: 17789 [2021-11-07 01:30:14,737 INFO L226 Difference]: Without dead ends: 8910 [2021-11-07 01:30:14,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 187 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 01:30:14,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8910 states. [2021-11-07 01:30:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8910 to 8910. [2021-11-07 01:30:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8910 states, 8603 states have (on average 1.3455771242589794) internal successors, (11576), 8627 states have internal predecessors, (11576), 186 states have call successors, (186), 114 states have call predecessors, (186), 120 states have return successors, (384), 174 states have call predecessors, (384), 186 states have call successors, (384) [2021-11-07 01:30:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8910 states to 8910 states and 12146 transitions. [2021-11-07 01:30:15,482 INFO L78 Accepts]: Start accepts. Automaton has 8910 states and 12146 transitions. Word has length 95 [2021-11-07 01:30:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:15,483 INFO L470 AbstractCegarLoop]: Abstraction has 8910 states and 12146 transitions. [2021-11-07 01:30:15,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8910 states and 12146 transitions. [2021-11-07 01:30:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:30:15,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:15,488 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:15,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:15,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:15,711 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash 683313096, now seen corresponding path program 1 times [2021-11-07 01:30:15,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:15,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794563236] [2021-11-07 01:30:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:15,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:15,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:15,714 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:15,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:30:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:18,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:30:18,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:19,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:20,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:20,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794563236] [2021-11-07 01:30:20,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794563236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:20,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:20,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:30:20,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277861920] [2021-11-07 01:30:20,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:30:20,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:30:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:30:20,354 INFO L87 Difference]: Start difference. First operand 8910 states and 12146 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:21,508 INFO L93 Difference]: Finished difference Result 17789 states and 24627 transitions. [2021-11-07 01:30:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-11-07 01:30:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:21,540 INFO L225 Difference]: With dead ends: 17789 [2021-11-07 01:30:21,540 INFO L226 Difference]: Without dead ends: 8910 [2021-11-07 01:30:21,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:30:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8910 states. [2021-11-07 01:30:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8910 to 8910. [2021-11-07 01:30:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8910 states, 8603 states have (on average 1.3441822620016273) internal successors, (11564), 8627 states have internal predecessors, (11564), 186 states have call successors, (186), 114 states have call predecessors, (186), 120 states have return successors, (384), 174 states have call predecessors, (384), 186 states have call successors, (384) [2021-11-07 01:30:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8910 states to 8910 states and 12134 transitions. [2021-11-07 01:30:22,198 INFO L78 Accepts]: Start accepts. Automaton has 8910 states and 12134 transitions. Word has length 96 [2021-11-07 01:30:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:22,198 INFO L470 AbstractCegarLoop]: Abstraction has 8910 states and 12134 transitions. [2021-11-07 01:30:22,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 8910 states and 12134 transitions. [2021-11-07 01:30:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:30:22,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:22,205 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:22,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:22,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:22,419 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1415914109, now seen corresponding path program 1 times [2021-11-07 01:30:22,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:22,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991527383] [2021-11-07 01:30:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:22,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:22,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:22,423 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:22,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:30:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:25,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:27,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:28,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:28,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991527383] [2021-11-07 01:30:28,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991527383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:28,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:28,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-07 01:30:28,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42062624] [2021-11-07 01:30:28,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:28,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:28,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:28,633 INFO L87 Difference]: Start difference. First operand 8910 states and 12134 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:30:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:31,950 INFO L93 Difference]: Finished difference Result 17177 states and 23757 transitions. [2021-11-07 01:30:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:31,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 96 [2021-11-07 01:30:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:31,977 INFO L225 Difference]: With dead ends: 17177 [2021-11-07 01:30:31,977 INFO L226 Difference]: Without dead ends: 8298 [2021-11-07 01:30:32,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8298 states. [2021-11-07 01:30:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8298 to 8298. [2021-11-07 01:30:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8298 states, 8021 states have (on average 1.3452188006482981) internal successors, (10790), 8045 states have internal predecessors, (10790), 168 states have call successors, (168), 102 states have call predecessors, (168), 108 states have return successors, (348), 156 states have call predecessors, (348), 168 states have call successors, (348) [2021-11-07 01:30:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 11306 transitions. [2021-11-07 01:30:32,509 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 11306 transitions. Word has length 96 [2021-11-07 01:30:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:32,509 INFO L470 AbstractCegarLoop]: Abstraction has 8298 states and 11306 transitions. [2021-11-07 01:30:32,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:30:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 11306 transitions. [2021-11-07 01:30:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 01:30:32,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:32,517 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:32,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:32,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:32,718 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:32,718 INFO L85 PathProgramCache]: Analyzing trace with hash 896227440, now seen corresponding path program 1 times [2021-11-07 01:30:32,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:32,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230396717] [2021-11-07 01:30:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:32,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:32,723 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:32,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:30:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:36,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:30:36,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:30:37,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:30:37,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:37,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230396717] [2021-11-07 01:30:37,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230396717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:37,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:37,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:30:37,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511628053] [2021-11-07 01:30:37,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:37,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:37,812 INFO L87 Difference]: Start difference. First operand 8298 states and 11306 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:38,297 INFO L93 Difference]: Finished difference Result 16565 states and 22911 transitions. [2021-11-07 01:30:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-11-07 01:30:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:38,324 INFO L225 Difference]: With dead ends: 16565 [2021-11-07 01:30:38,324 INFO L226 Difference]: Without dead ends: 8298 [2021-11-07 01:30:38,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8298 states. [2021-11-07 01:30:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8298 to 8298. [2021-11-07 01:30:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8298 states, 8021 states have (on average 1.3444707642438598) internal successors, (10784), 8045 states have internal predecessors, (10784), 168 states have call successors, (168), 102 states have call predecessors, (168), 108 states have return successors, (348), 156 states have call predecessors, (348), 168 states have call successors, (348) [2021-11-07 01:30:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 11300 transitions. [2021-11-07 01:30:38,748 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 11300 transitions. Word has length 124 [2021-11-07 01:30:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:38,748 INFO L470 AbstractCegarLoop]: Abstraction has 8298 states and 11300 transitions. [2021-11-07 01:30:38,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 11300 transitions. [2021-11-07 01:30:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 01:30:38,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:38,760 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:38,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:38,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:38,975 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:38,975 INFO L85 PathProgramCache]: Analyzing trace with hash 415147182, now seen corresponding path program 1 times [2021-11-07 01:30:38,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:38,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880586024] [2021-11-07 01:30:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:38,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:38,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:38,978 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:30:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:42,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 01:30:42,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:30:44,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:30:45,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:45,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880586024] [2021-11-07 01:30:45,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880586024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:45,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:45,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 5] imperfect sequences [] total 13 [2021-11-07 01:30:45,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319037412] [2021-11-07 01:30:45,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:30:45,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:30:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:30:45,740 INFO L87 Difference]: Start difference. First operand 8298 states and 11300 transitions. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:55,998 INFO L93 Difference]: Finished difference Result 23561 states and 32727 transitions. [2021-11-07 01:30:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 01:30:55,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-11-07 01:30:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:56,049 INFO L225 Difference]: With dead ends: 23561 [2021-11-07 01:30:56,049 INFO L226 Difference]: Without dead ends: 15294 [2021-11-07 01:30:56,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:30:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15294 states. [2021-11-07 01:30:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15294 to 8316. [2021-11-07 01:30:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8316 states, 8039 states have (on average 1.3436994651076004) internal successors, (10802), 8063 states have internal predecessors, (10802), 168 states have call successors, (168), 102 states have call predecessors, (168), 108 states have return successors, (348), 156 states have call predecessors, (348), 168 states have call successors, (348) [2021-11-07 01:30:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8316 states to 8316 states and 11318 transitions. [2021-11-07 01:30:56,681 INFO L78 Accepts]: Start accepts. Automaton has 8316 states and 11318 transitions. Word has length 124 [2021-11-07 01:30:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:56,681 INFO L470 AbstractCegarLoop]: Abstraction has 8316 states and 11318 transitions. [2021-11-07 01:30:56,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:30:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 8316 states and 11318 transitions. [2021-11-07 01:30:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:30:56,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:56,693 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:56,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:56,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:56,915 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:56,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1738876936, now seen corresponding path program 1 times [2021-11-07 01:30:56,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:56,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700021453] [2021-11-07 01:30:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:56,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:56,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:56,918 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:56,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:31:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:31:01,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:31:04,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:04,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700021453] [2021-11-07 01:31:04,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700021453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:04,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:04,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:04,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295552780] [2021-11-07 01:31:04,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:04,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2021-11-07 01:31:04,260 INFO L87 Difference]: Start difference. First operand 8316 states and 11318 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:05,339 INFO L93 Difference]: Finished difference Result 19283 states and 26661 transitions. [2021-11-07 01:31:05,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-11-07 01:31:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:05,389 INFO L225 Difference]: With dead ends: 19283 [2021-11-07 01:31:05,389 INFO L226 Difference]: Without dead ends: 10998 [2021-11-07 01:31:05,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2021-11-07 01:31:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10998 states. [2021-11-07 01:31:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10998 to 8322. [2021-11-07 01:31:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8322 states, 8045 states have (on average 1.3434431323803604) internal successors, (10808), 8069 states have internal predecessors, (10808), 168 states have call successors, (168), 102 states have call predecessors, (168), 108 states have return successors, (348), 156 states have call predecessors, (348), 168 states have call successors, (348) [2021-11-07 01:31:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8322 states to 8322 states and 11324 transitions. [2021-11-07 01:31:05,983 INFO L78 Accepts]: Start accepts. Automaton has 8322 states and 11324 transitions. Word has length 134 [2021-11-07 01:31:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:05,983 INFO L470 AbstractCegarLoop]: Abstraction has 8322 states and 11324 transitions. [2021-11-07 01:31:05,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 8322 states and 11324 transitions. [2021-11-07 01:31:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:31:05,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:05,994 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:31:06,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:06,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:06,219 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:31:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash 841483658, now seen corresponding path program 1 times [2021-11-07 01:31:06,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:06,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881441467] [2021-11-07 01:31:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:06,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:06,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:06,222 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:06,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:31:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:10,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:31:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:31:10,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:31:11,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:11,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881441467] [2021-11-07 01:31:11,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881441467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:11,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:11,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:11,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082890163] [2021-11-07 01:31:11,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:11,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:11,346 INFO L87 Difference]: Start difference. First operand 8322 states and 11324 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:11,988 INFO L93 Difference]: Finished difference Result 16625 states and 22971 transitions. [2021-11-07 01:31:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:31:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-11-07 01:31:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:12,020 INFO L225 Difference]: With dead ends: 16625 [2021-11-07 01:31:12,020 INFO L226 Difference]: Without dead ends: 8334 [2021-11-07 01:31:12,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8334 states. [2021-11-07 01:31:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8334 to 8334. [2021-11-07 01:31:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8334 states, 8057 states have (on average 1.3429316122626287) internal successors, (10820), 8081 states have internal predecessors, (10820), 168 states have call successors, (168), 102 states have call predecessors, (168), 108 states have return successors, (348), 156 states have call predecessors, (348), 168 states have call successors, (348) [2021-11-07 01:31:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8334 states to 8334 states and 11336 transitions. [2021-11-07 01:31:12,577 INFO L78 Accepts]: Start accepts. Automaton has 8334 states and 11336 transitions. Word has length 134 [2021-11-07 01:31:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:12,577 INFO L470 AbstractCegarLoop]: Abstraction has 8334 states and 11336 transitions. [2021-11-07 01:31:12,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8334 states and 11336 transitions. [2021-11-07 01:31:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 01:31:12,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:12,585 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:31:12,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:12,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:12,785 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:31:12,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1421881654, now seen corresponding path program 1 times [2021-11-07 01:31:12,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:12,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317171687] [2021-11-07 01:31:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:12,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:12,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:12,790 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:12,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:31:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:16,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:31:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:31:17,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:31:18,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:18,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317171687] [2021-11-07 01:31:18,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317171687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:18,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [745035497] [2021-11-07 01:31:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:18,888 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:18,890 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:18,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:31:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:21,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:31:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:31:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:31:22,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [745035497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:22,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:22,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:31:22,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093088233] [2021-11-07 01:31:22,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:31:22,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:22,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:31:22,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:31:22,737 INFO L87 Difference]: Start difference. First operand 8334 states and 11336 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:24,746 INFO L93 Difference]: Finished difference Result 18983 states and 26280 transitions. [2021-11-07 01:31:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:31:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-11-07 01:31:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:24,872 INFO L225 Difference]: With dead ends: 18983 [2021-11-07 01:31:24,872 INFO L226 Difference]: Without dead ends: 10680 [2021-11-07 01:31:24,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:31:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10680 states. [2021-11-07 01:31:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10680 to 8352. [2021-11-07 01:31:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8352 states, 8075 states have (on average 1.3421671826625388) internal successors, (10838), 8099 states have internal predecessors, (10838), 168 states have call successors, (168), 102 states have call predecessors, (168), 108 states have return successors, (348), 156 states have call predecessors, (348), 168 states have call successors, (348) [2021-11-07 01:31:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8352 states to 8352 states and 11354 transitions. [2021-11-07 01:31:25,402 INFO L78 Accepts]: Start accepts. Automaton has 8352 states and 11354 transitions. Word has length 136 [2021-11-07 01:31:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:25,402 INFO L470 AbstractCegarLoop]: Abstraction has 8352 states and 11354 transitions. [2021-11-07 01:31:25,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 8352 states and 11354 transitions. [2021-11-07 01:31:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-07 01:31:25,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:25,411 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:31:25,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:25,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:25,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:25,827 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:31:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:25,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1757373177, now seen corresponding path program 1 times [2021-11-07 01:31:25,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:25,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107271291] [2021-11-07 01:31:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:25,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:25,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:25,831 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:25,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:31:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:29,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:31:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:31:30,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:31:32,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:32,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107271291] [2021-11-07 01:31:32,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107271291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:32,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1211795189] [2021-11-07 01:31:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:32,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:32,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:32,304 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:32,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:31:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:34,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:31:35,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:31:36,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:31:37,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1211795189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:37,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:37,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:31:37,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819776291] [2021-11-07 01:31:37,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:31:37,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:37,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:31:37,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:31:37,277 INFO L87 Difference]: Start difference. First operand 8352 states and 11354 transitions. Second operand has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:41,300 INFO L93 Difference]: Finished difference Result 28343 states and 39402 transitions. [2021-11-07 01:31:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:31:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-11-07 01:31:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:41,364 INFO L225 Difference]: With dead ends: 28343 [2021-11-07 01:31:41,365 INFO L226 Difference]: Without dead ends: 20022 [2021-11-07 01:31:41,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:31:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20022 states. [2021-11-07 01:31:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20022 to 8376. [2021-11-07 01:31:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8376 states, 8099 states have (on average 1.3418940609951846) internal successors, (10868), 8123 states have internal predecessors, (10868), 168 states have call successors, (168), 102 states have call predecessors, (168), 108 states have return successors, (348), 156 states have call predecessors, (348), 168 states have call successors, (348) [2021-11-07 01:31:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8376 states to 8376 states and 11384 transitions. [2021-11-07 01:31:42,153 INFO L78 Accepts]: Start accepts. Automaton has 8376 states and 11384 transitions. Word has length 153 [2021-11-07 01:31:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:42,154 INFO L470 AbstractCegarLoop]: Abstraction has 8376 states and 11384 transitions. [2021-11-07 01:31:42,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 8376 states and 11384 transitions. [2021-11-07 01:31:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 01:31:42,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:42,164 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:31:42,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:42,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:42,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:42,567 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:31:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash 896812931, now seen corresponding path program 1 times [2021-11-07 01:31:42,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:42,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266372287] [2021-11-07 01:31:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:42,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:42,570 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:42,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:31:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:31:46,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:31:47,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:31:49,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:49,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266372287] [2021-11-07 01:31:49,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266372287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:49,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1287057252] [2021-11-07 01:31:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:49,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:49,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:49,242 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:49,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:31:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1753 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:31:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:31:53,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:31:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1287057252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:54,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:54,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:31:54,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118239127] [2021-11-07 01:31:54,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:31:54,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:31:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:31:54,283 INFO L87 Difference]: Start difference. First operand 8376 states and 11384 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:31:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:59,847 INFO L93 Difference]: Finished difference Result 19733 states and 27249 transitions. [2021-11-07 01:31:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:31:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-11-07 01:31:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:59,883 INFO L225 Difference]: With dead ends: 19733 [2021-11-07 01:31:59,883 INFO L226 Difference]: Without dead ends: 11388 [2021-11-07 01:31:59,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:31:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11388 states. [2021-11-07 01:32:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11388 to 9756. [2021-11-07 01:32:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9756 states, 9467 states have (on average 1.3454103728741946) internal successors, (12737), 9491 states have internal predecessors, (12737), 177 states have call successors, (177), 102 states have call predecessors, (177), 111 states have return successors, (372), 168 states have call predecessors, (372), 177 states have call successors, (372) [2021-11-07 01:32:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9756 states to 9756 states and 13286 transitions. [2021-11-07 01:32:00,759 INFO L78 Accepts]: Start accepts. Automaton has 9756 states and 13286 transitions. Word has length 155 [2021-11-07 01:32:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:00,760 INFO L470 AbstractCegarLoop]: Abstraction has 9756 states and 13286 transitions. [2021-11-07 01:32:00,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:32:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 9756 states and 13286 transitions. [2021-11-07 01:32:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 01:32:00,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:00,773 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:00,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:00,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:01,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:01,174 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:32:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1805149313, now seen corresponding path program 1 times [2021-11-07 01:32:01,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:01,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585054886] [2021-11-07 01:32:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:01,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:01,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:01,177 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:01,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:32:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:05,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:32:05,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:32:07,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:32:08,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:08,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585054886] [2021-11-07 01:32:08,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585054886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:08,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864303442] [2021-11-07 01:32:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:08,740 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:08,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:08,747 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:08,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:32:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:32:15,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:32:16,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864303442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:16,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603055970] [2021-11-07 01:32:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:16,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:32:16,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:16,361 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:32:16,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 01:32:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:19,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:32:22,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:32:23,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603055970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:23,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:32:23,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-11-07 01:32:23,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776543061] [2021-11-07 01:32:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:32:23,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:32:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:32:23,189 INFO L87 Difference]: Start difference. First operand 9756 states and 13286 transitions. Second operand has 12 states, 12 states have (on average 36.166666666666664) internal successors, (434), 12 states have internal predecessors, (434), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 01:32:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:47,612 INFO L93 Difference]: Finished difference Result 68240 states and 95254 transitions. [2021-11-07 01:32:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 01:32:47,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 36.166666666666664) internal successors, (434), 12 states have internal predecessors, (434), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 180 [2021-11-07 01:32:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:47,814 INFO L225 Difference]: With dead ends: 68240 [2021-11-07 01:32:47,814 INFO L226 Difference]: Without dead ends: 58515 [2021-11-07 01:32:47,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1065 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=483, Invalid=1497, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 01:32:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58515 states. [2021-11-07 01:32:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58515 to 58314. [2021-11-07 01:32:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58314 states, 56585 states have (on average 1.3448793849960237) internal successors, (76100), 56741 states have internal predecessors, (76100), 1062 states have call successors, (1062), 612 states have call predecessors, (1062), 666 states have return successors, (2232), 996 states have call predecessors, (2232), 1062 states have call successors, (2232) [2021-11-07 01:32:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58314 states to 58314 states and 79394 transitions. [2021-11-07 01:32:53,818 INFO L78 Accepts]: Start accepts. Automaton has 58314 states and 79394 transitions. Word has length 180 [2021-11-07 01:32:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:53,818 INFO L470 AbstractCegarLoop]: Abstraction has 58314 states and 79394 transitions. [2021-11-07 01:32:53,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 36.166666666666664) internal successors, (434), 12 states have internal predecessors, (434), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 01:32:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 58314 states and 79394 transitions. [2021-11-07 01:32:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 01:32:53,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:53,884 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:53,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:54,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:54,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-07 01:32:54,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:32:54,485 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:32:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1077128323, now seen corresponding path program 1 times [2021-11-07 01:32:54,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:54,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612099986] [2021-11-07 01:32:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:54,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:54,489 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:54,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:32:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:32:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:33:01,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:33:05,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:05,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612099986] [2021-11-07 01:33:05,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612099986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:05,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954658749] [2021-11-07 01:33:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:05,363 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:05,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:05,365 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:05,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a70620-2537-4625-bd14-80548eb0b650/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:33:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 01:33:09,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 01:33:10,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954658749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:10,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:33:10,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 9] total 19 [2021-11-07 01:33:10,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405441792] [2021-11-07 01:33:10,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:33:10,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:33:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:33:10,551 INFO L87 Difference]: Start difference. First operand 58314 states and 79394 transitions. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 01:33:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:23,127 INFO L93 Difference]: Finished difference Result 175024 states and 238288 transitions. [2021-11-07 01:33:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:33:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2021-11-07 01:33:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:23,826 INFO L225 Difference]: With dead ends: 175024 [2021-11-07 01:33:23,826 INFO L226 Difference]: Without dead ends: 116741 [2021-11-07 01:33:23,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:33:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116741 states.