./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/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 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:35:51,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:35:51,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:35:51,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:35:51,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:35:51,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:35:51,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:35:51,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:35:51,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:35:51,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:35:51,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:35:51,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:35:51,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:35:51,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:35:51,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:35:51,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:35:51,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:35:51,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:35:51,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:35:51,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:35:51,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:35:51,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:35:51,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:35:51,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:35:51,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:35:51,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:35:51,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:35:51,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:35:51,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:35:51,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:35:51,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:35:51,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:35:51,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:35:51,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:35:51,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:35:51,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:35:51,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:35:51,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:35:51,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:35:51,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:35:51,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:35:51,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:35:51,653 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:35:51,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:35:51,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:35:51,655 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:35:51,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:35:51,656 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:35:51,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:35:51,657 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:35:51,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:35:51,658 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:35:51,658 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:35:51,658 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:35:51,659 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:35:51,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:35:51,660 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:35:51,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:35:51,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:35:51,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:35:51,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:35:51,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:35:51,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:35:51,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:35:51,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:35:51,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:35:51,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:35:51,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:35:51,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:35:51,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:51,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:35:51,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:35:51,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:35:51,667 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:35:51,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:35:51,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:35:51,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:35:51,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:35:51,668 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-07 01:35:52,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:35:52,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:35:52,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:35:52,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:35:52,066 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:35:52,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-07 01:35:52,158 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data/be6dfc987/b04834f2bf7b49a8a94697d5c107f6dd/FLAG35254f793 [2021-11-07 01:35:53,345 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:35:53,346 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-07 01:35:53,430 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data/be6dfc987/b04834f2bf7b49a8a94697d5c107f6dd/FLAG35254f793 [2021-11-07 01:35:53,697 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data/be6dfc987/b04834f2bf7b49a8a94697d5c107f6dd [2021-11-07 01:35:53,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:35:53,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:35:53,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:53,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:35:53,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:35:53,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:53" (1/1) ... [2021-11-07 01:35:53,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e178c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:53, skipping insertion in model container [2021-11-07 01:35:53,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:53" (1/1) ... [2021-11-07 01:35:53,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:35:53,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:55,285 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 01:35:55,595 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 01:35:56,861 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-07 01:35:56,864 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-07 01:35:56,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:57,000 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 01:35:57,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e5512ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:57, skipping insertion in model container [2021-11-07 01:35:57,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:57,001 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:35:57,005 INFO L168 Benchmark]: Toolchain (without parser) took 3299.60 ms. Allocated memory was 86.0 MB in the beginning and 153.1 MB in the end (delta: 67.1 MB). Free memory was 54.6 MB in the beginning and 108.3 MB in the end (delta: -53.7 MB). Peak memory consumption was 42.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:35:57,005 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory was 66.2 MB in the beginning and 66.2 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:35:57,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 3295.05 ms. Allocated memory was 86.0 MB in the beginning and 153.1 MB in the end (delta: 67.1 MB). Free memory was 54.4 MB in the beginning and 108.3 MB in the end (delta: -54.0 MB). Peak memory consumption was 42.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:35:57,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory was 66.2 MB in the beginning and 66.2 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 3295.05 ms. Allocated memory was 86.0 MB in the beginning and 153.1 MB in the end (delta: 67.1 MB). Free memory was 54.4 MB in the beginning and 108.3 MB in the end (delta: -54.0 MB). Peak memory consumption was 42.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5659]: 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/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 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:35:59,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:35:59,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:35:59,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:35:59,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:35:59,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:35:59,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:35:59,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:35:59,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:35:59,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:35:59,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:35:59,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:35:59,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:35:59,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:35:59,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:35:59,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:35:59,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:35:59,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:35:59,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:35:59,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:35:59,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:35:59,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:35:59,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:35:59,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:35:59,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:35:59,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:35:59,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:35:59,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:35:59,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:35:59,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:35:59,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:35:59,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:35:59,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:35:59,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:35:59,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:35:59,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:35:59,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:35:59,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:35:59,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:35:59,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:35:59,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:35:59,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:35:59,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:35:59,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:35:59,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:35:59,899 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:35:59,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:35:59,900 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:35:59,900 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:35:59,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:35:59,901 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:35:59,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:35:59,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:35:59,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:35:59,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:35:59,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:35:59,903 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:35:59,903 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:35:59,904 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:35:59,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:35:59,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:35:59,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:35:59,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:35:59,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:35:59,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:35:59,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:59,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:35:59,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:35:59,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:35:59,907 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:35:59,907 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:59,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:35:59,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:35:59,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:35:59,908 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-07 01:36:00,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:36:00,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:36:00,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:36:00,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:36:00,427 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:36:00,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-07 01:36:00,508 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data/9c297c006/38e70be83a0c445783c2d9ba0cd54465/FLAG1516c460f [2021-11-07 01:36:01,726 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:36:01,728 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-07 01:36:01,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data/9c297c006/38e70be83a0c445783c2d9ba0cd54465/FLAG1516c460f [2021-11-07 01:36:02,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/data/9c297c006/38e70be83a0c445783c2d9ba0cd54465 [2021-11-07 01:36:02,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:36:02,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:36:02,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:02,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:36:02,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:36:02,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:02" (1/1) ... [2021-11-07 01:36:02,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4934cce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:02, skipping insertion in model container [2021-11-07 01:36:02,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:02" (1/1) ... [2021-11-07 01:36:02,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:36:02,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:36:05,532 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-07 01:36:05,535 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-07 01:36:05,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:05,696 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:36:05,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:36:06,285 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-07 01:36:06,286 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-07 01:36:06,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:06,332 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:36:06,774 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-07 01:36:06,775 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_8ed160b8-34c6-46b1-b112-af3ab3a8705e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-07 01:36:06,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:07,141 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:36:07,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07 WrapperNode [2021-11-07 01:36:07,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:07,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:36:07,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:36:07,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:36:07,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:07,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:36:08,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:36:08,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:36:08,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:36:08,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:36:08,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:36:08,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:36:08,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:36:08,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (1/1) ... [2021-11-07 01:36:08,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:36:08,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:36:08,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:36:08,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:36:08,974 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 01:36:08,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:36:08,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:36:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:36:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:36:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:36:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:36:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:36:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 01:36:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:36:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:36:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:36:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:36:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:36:08,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:36:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:36:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:36:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:36:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:36:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:36:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:36:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:36:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:36:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:36:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:36:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:36:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:36:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:36:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:36:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:36:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:36:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:36:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-07 01:39:59,897 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0bv32; [2021-11-07 01:39:59,897 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break#2: ldv_switch_0_#res := 0bv32; [2021-11-07 01:39:59,898 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0bv32; [2021-11-07 01:39:59,899 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-07 01:39:59,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:39:59,942 INFO L299 CfgBuilder]: Removed 2703 assume(true) statements. [2021-11-07 01:39:59,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:59 BoogieIcfgContainer [2021-11-07 01:39:59,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:39:59,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:39:59,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:39:59,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:39:59,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:36:02" (1/3) ... [2021-11-07 01:39:59,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467ae352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:59, skipping insertion in model container [2021-11-07 01:39:59,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:07" (2/3) ... [2021-11-07 01:39:59,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467ae352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:59, skipping insertion in model container [2021-11-07 01:39:59,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:59" (3/3) ... [2021-11-07 01:39:59,958 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-07 01:39:59,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:39:59,964 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-07 01:40:00,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:40:00,032 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 01:40:00,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-07 01:40:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 3189 states, 3130 states have (on average 1.4987220447284344) internal successors, (4691), 3188 states have internal predecessors, (4691), 0 states have call successors, (0), 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 01:40:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:40:00,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:00,119 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:00,120 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:40:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1107920357, now seen corresponding path program 1 times [2021-11-07 01:40:00,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:00,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559595194] [2021-11-07 01:40:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:00,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:00,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:00,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:40:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:10,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 2872 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:10,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:10,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:10,812 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 01:40:10,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:10,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559595194] [2021-11-07 01:40:10,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559595194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:10,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:10,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:10,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756101789] [2021-11-07 01:40:10,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:10,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:10,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:10,844 INFO L87 Difference]: Start difference. First operand has 3189 states, 3130 states have (on average 1.4987220447284344) internal successors, (4691), 3188 states have internal predecessors, (4691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:14,167 INFO L93 Difference]: Finished difference Result 7249 states and 10617 transitions. [2021-11-07 01:40:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:40:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:14,216 INFO L225 Difference]: With dead ends: 7249 [2021-11-07 01:40:14,216 INFO L226 Difference]: Without dead ends: 3780 [2021-11-07 01:40:14,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 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 01:40:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-11-07 01:40:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3748. [2021-11-07 01:40:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3689 states have (on average 1.4339929520195174) internal successors, (5290), 3747 states have internal predecessors, (5290), 0 states have call successors, (0), 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 01:40:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 5290 transitions. [2021-11-07 01:40:14,465 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 5290 transitions. Word has length 60 [2021-11-07 01:40:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:14,466 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 5290 transitions. [2021-11-07 01:40:14,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 5290 transitions. [2021-11-07 01:40:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:40:14,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:14,475 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:14,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:40:14,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:14,699 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:40:14,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:14,700 INFO L85 PathProgramCache]: Analyzing trace with hash -580581691, now seen corresponding path program 1 times [2021-11-07 01:40:14,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:14,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501998009] [2021-11-07 01:40:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:14,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:14,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:14,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:14,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:40:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:24,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:24,760 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 01:40:24,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:25,096 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 01:40:25,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:25,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501998009] [2021-11-07 01:40:25,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501998009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:25,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:25,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:25,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123873932] [2021-11-07 01:40:25,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:25,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:25,100 INFO L87 Difference]: Start difference. First operand 3748 states and 5290 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:28,144 INFO L93 Difference]: Finished difference Result 10167 states and 14392 transitions. [2021-11-07 01:40:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:28,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:40:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:28,189 INFO L225 Difference]: With dead ends: 10167 [2021-11-07 01:40:28,189 INFO L226 Difference]: Without dead ends: 6487 [2021-11-07 01:40:28,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6487 states. [2021-11-07 01:40:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6487 to 6327. [2021-11-07 01:40:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6268 states have (on average 1.4440012763241863) internal successors, (9051), 6326 states have internal predecessors, (9051), 0 states have call successors, (0), 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 01:40:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 9051 transitions. [2021-11-07 01:40:28,573 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 9051 transitions. Word has length 70 [2021-11-07 01:40:28,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:28,574 INFO L470 AbstractCegarLoop]: Abstraction has 6327 states and 9051 transitions. [2021-11-07 01:40:28,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 9051 transitions. [2021-11-07 01:40:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:40:28,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:28,579 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:28,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:28,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:28,803 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:40:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1869288537, now seen corresponding path program 1 times [2021-11-07 01:40:28,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:28,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733775049] [2021-11-07 01:40:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:28,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:28,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:28,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:40:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:38,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:38,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:39,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:39,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:39,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733775049] [2021-11-07 01:40:39,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733775049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:39,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:39,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:39,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117789674] [2021-11-07 01:40:39,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:39,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:39,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:39,657 INFO L87 Difference]: Start difference. First operand 6327 states and 9051 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:40:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:42,913 INFO L93 Difference]: Finished difference Result 25054 states and 35920 transitions. [2021-11-07 01:40:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:40:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:43,035 INFO L225 Difference]: With dead ends: 25054 [2021-11-07 01:40:43,036 INFO L226 Difference]: Without dead ends: 18795 [2021-11-07 01:40:43,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 148 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 01:40:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18795 states. [2021-11-07 01:40:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18795 to 18511. [2021-11-07 01:40:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18511 states, 18452 states have (on average 1.4499783221331022) internal successors, (26755), 18510 states have internal predecessors, (26755), 0 states have call successors, (0), 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 01:40:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 26755 transitions. [2021-11-07 01:40:43,809 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 26755 transitions. Word has length 76 [2021-11-07 01:40:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:43,811 INFO L470 AbstractCegarLoop]: Abstraction has 18511 states and 26755 transitions. [2021-11-07 01:40:43,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:40:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 26755 transitions. [2021-11-07 01:40:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 01:40:43,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:43,818 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:40:43,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:44,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:44,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:40:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1428555645, now seen corresponding path program 1 times [2021-11-07 01:40:44,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:44,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521021918] [2021-11-07 01:40:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:44,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:44,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:44,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:44,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:40:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:54,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:54,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:54,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521021918] [2021-11-07 01:40:54,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521021918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:54,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:54,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:54,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445674858] [2021-11-07 01:40:54,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:54,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:54,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:54,723 INFO L87 Difference]: Start difference. First operand 18511 states and 26755 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 01:40:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:58,365 INFO L93 Difference]: Finished difference Result 39882 states and 57490 transitions. [2021-11-07 01:40:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 109 [2021-11-07 01:40:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:58,431 INFO L225 Difference]: With dead ends: 39882 [2021-11-07 01:40:58,432 INFO L226 Difference]: Without dead ends: 21439 [2021-11-07 01:40:58,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 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 01:40:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21439 states. [2021-11-07 01:40:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21439 to 21395. [2021-11-07 01:40:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21395 states, 21336 states have (on average 1.4396794150731158) internal successors, (30717), 21394 states have internal predecessors, (30717), 0 states have call successors, (0), 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 01:40:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21395 states to 21395 states and 30717 transitions. [2021-11-07 01:40:59,270 INFO L78 Accepts]: Start accepts. Automaton has 21395 states and 30717 transitions. Word has length 109 [2021-11-07 01:40:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:59,272 INFO L470 AbstractCegarLoop]: Abstraction has 21395 states and 30717 transitions. [2021-11-07 01:40:59,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 01:40:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 21395 states and 30717 transitions. [2021-11-07 01:40:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 01:40:59,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:59,289 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:40:59,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:59,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:59,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:40:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2048557782, now seen corresponding path program 1 times [2021-11-07 01:40:59,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:59,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303012810] [2021-11-07 01:40:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:59,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:59,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:59,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:59,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:41:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:10,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:41:10,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:41:11,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:41:12,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:12,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303012810] [2021-11-07 01:41:12,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303012810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:12,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:12,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:41:12,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562330115] [2021-11-07 01:41:12,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:41:12,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:41:12,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:41:12,145 INFO L87 Difference]: Start difference. First operand 21395 states and 30717 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:17,193 INFO L93 Difference]: Finished difference Result 67020 states and 95138 transitions. [2021-11-07 01:41:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:41:17,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-07 01:41:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:17,315 INFO L225 Difference]: With dead ends: 67020 [2021-11-07 01:41:17,316 INFO L226 Difference]: Without dead ends: 45693 [2021-11-07 01:41:17,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45693 states. [2021-11-07 01:41:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45693 to 21413. [2021-11-07 01:41:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21413 states, 21354 states have (on average 1.439308794605226) internal successors, (30735), 21412 states have internal predecessors, (30735), 0 states have call successors, (0), 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 01:41:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 30735 transitions. [2021-11-07 01:41:19,001 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 30735 transitions. Word has length 157 [2021-11-07 01:41:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:19,002 INFO L470 AbstractCegarLoop]: Abstraction has 21413 states and 30735 transitions. [2021-11-07 01:41:19,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 30735 transitions. [2021-11-07 01:41:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-07 01:41:19,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:19,007 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:41:19,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:19,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:19,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:41:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1156334602, now seen corresponding path program 1 times [2021-11-07 01:41:19,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:19,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551299492] [2021-11-07 01:41:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:19,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:19,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:19,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:41:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:30,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 3316 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:41:30,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:41:31,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:41:31,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:31,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551299492] [2021-11-07 01:41:31,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551299492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:31,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:31,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:31,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599680675] [2021-11-07 01:41:31,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:31,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:31,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:31,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:31,572 INFO L87 Difference]: Start difference. First operand 21413 states and 30735 transitions. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 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 01:41:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:37,899 INFO L93 Difference]: Finished difference Result 42788 states and 61436 transitions. [2021-11-07 01:41:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:41:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 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 163 [2021-11-07 01:41:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:37,977 INFO L225 Difference]: With dead ends: 42788 [2021-11-07 01:41:37,978 INFO L226 Difference]: Without dead ends: 21443 [2021-11-07 01:41:38,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:41:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-11-07 01:41:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 21443. [2021-11-07 01:41:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21443 states, 21384 states have (on average 1.438692480359147) internal successors, (30765), 21442 states have internal predecessors, (30765), 0 states have call successors, (0), 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 01:41:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 30765 transitions. [2021-11-07 01:41:39,284 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 30765 transitions. Word has length 163 [2021-11-07 01:41:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:39,284 INFO L470 AbstractCegarLoop]: Abstraction has 21443 states and 30765 transitions. [2021-11-07 01:41:39,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 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 01:41:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 30765 transitions. [2021-11-07 01:41:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 01:41:39,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:39,291 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:39,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:39,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:39,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:41:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:39,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1255741942, now seen corresponding path program 1 times [2021-11-07 01:41:39,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:39,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133794153] [2021-11-07 01:41:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:39,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:39,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:39,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:41:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:51,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 3326 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:41:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:41:51,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:41:52,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:52,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133794153] [2021-11-07 01:41:52,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133794153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:52,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892424662] [2021-11-07 01:41:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:52,239 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:52,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:52,241 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:52,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:41:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:55,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 3326 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:41:57,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:41:58,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [892424662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:58,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:58,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:41:58,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797203175] [2021-11-07 01:41:58,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:58,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:41:58,631 INFO L87 Difference]: Start difference. First operand 21443 states and 30765 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:59,977 INFO L93 Difference]: Finished difference Result 42818 states and 61454 transitions. [2021-11-07 01:41:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-07 01:41:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:00,015 INFO L225 Difference]: With dead ends: 42818 [2021-11-07 01:42:00,015 INFO L226 Difference]: Without dead ends: 21443 [2021-11-07 01:42:00,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:42:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-11-07 01:42:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 21443. [2021-11-07 01:42:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21443 states, 21384 states have (on average 1.42003367003367) internal successors, (30366), 21442 states have internal predecessors, (30366), 0 states have call successors, (0), 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 01:42:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 30366 transitions. [2021-11-07 01:42:01,167 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 30366 transitions. Word has length 169 [2021-11-07 01:42:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:01,168 INFO L470 AbstractCegarLoop]: Abstraction has 21443 states and 30366 transitions. [2021-11-07 01:42:01,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 30366 transitions. [2021-11-07 01:42:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 01:42:01,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:01,173 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:01,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:01,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:01,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:01,595 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:42:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:01,595 INFO L85 PathProgramCache]: Analyzing trace with hash -273054118, now seen corresponding path program 1 times [2021-11-07 01:42:01,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:01,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966600733] [2021-11-07 01:42:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:01,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:01,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:01,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:42:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 3327 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:42:14,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:42:14,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:14,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966600733] [2021-11-07 01:42:14,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966600733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:14,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1876644132] [2021-11-07 01:42:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:14,513 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:14,514 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:14,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:42:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 3327 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:18,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:42:19,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:42:21,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1876644132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:21,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:21,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:42:21,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413422482] [2021-11-07 01:42:21,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:21,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:21,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:42:21,009 INFO L87 Difference]: Start difference. First operand 21443 states and 30366 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 01:42:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:22,282 INFO L93 Difference]: Finished difference Result 42818 states and 60656 transitions. [2021-11-07 01:42:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 170 [2021-11-07 01:42:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:22,310 INFO L225 Difference]: With dead ends: 42818 [2021-11-07 01:42:22,311 INFO L226 Difference]: Without dead ends: 21443 [2021-11-07 01:42:22,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:42:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-11-07 01:42:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 21443. [2021-11-07 01:42:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21443 states, 21384 states have (on average 1.401374859708193) internal successors, (29967), 21442 states have internal predecessors, (29967), 0 states have call successors, (0), 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 01:42:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 29967 transitions. [2021-11-07 01:42:23,642 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 29967 transitions. Word has length 170 [2021-11-07 01:42:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:23,642 INFO L470 AbstractCegarLoop]: Abstraction has 21443 states and 29967 transitions. [2021-11-07 01:42:23,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 01:42:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 29967 transitions. [2021-11-07 01:42:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-07 01:42:23,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:23,648 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:23,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:23,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:24,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:24,063 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:42:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash 125646309, now seen corresponding path program 1 times [2021-11-07 01:42:24,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:24,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27223179] [2021-11-07 01:42:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:24,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:24,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:24,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:42:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 3328 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:42:36,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:42:37,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:37,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27223179] [2021-11-07 01:42:37,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27223179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:37,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284164592] [2021-11-07 01:42:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:37,190 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:37,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:37,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:37,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:42:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:40,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 3328 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:42:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:42:42,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:42:44,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284164592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:44,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:44,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:42:44,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184137862] [2021-11-07 01:42:44,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:44,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:42:44,138 INFO L87 Difference]: Start difference. First operand 21443 states and 29967 transitions. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 01:42:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:45,345 INFO L93 Difference]: Finished difference Result 42818 states and 59858 transitions. [2021-11-07 01:42:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 171 [2021-11-07 01:42:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:45,371 INFO L225 Difference]: With dead ends: 42818 [2021-11-07 01:42:45,371 INFO L226 Difference]: Without dead ends: 21443 [2021-11-07 01:42:45,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:42:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-11-07 01:42:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 21443. [2021-11-07 01:42:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21443 states, 21384 states have (on average 1.382716049382716) internal successors, (29568), 21442 states have internal predecessors, (29568), 0 states have call successors, (0), 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 01:42:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 29568 transitions. [2021-11-07 01:42:46,567 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 29568 transitions. Word has length 171 [2021-11-07 01:42:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:46,568 INFO L470 AbstractCegarLoop]: Abstraction has 21443 states and 29568 transitions. [2021-11-07 01:42:46,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 01:42:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 29568 transitions. [2021-11-07 01:42:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 01:42:46,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:46,573 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:46,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:42:46,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:46,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:46,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:42:46,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:46,988 INFO L85 PathProgramCache]: Analyzing trace with hash -399393387, now seen corresponding path program 1 times [2021-11-07 01:42:46,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:46,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843096694] [2021-11-07 01:42:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:46,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:46,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:46,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:46,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:42:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:58,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 3329 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:58,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:42:59,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:42:59,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:59,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843096694] [2021-11-07 01:42:59,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843096694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:59,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [709637723] [2021-11-07 01:42:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:59,944 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:59,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:59,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:59,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:43:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 3329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:43:05,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:43:06,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [709637723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:06,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:43:06,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:43:06,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558620376] [2021-11-07 01:43:06,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:06,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:06,944 INFO L87 Difference]: Start difference. First operand 21443 states and 29568 transitions. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 01:43:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:08,656 INFO L93 Difference]: Finished difference Result 44823 states and 61615 transitions. [2021-11-07 01:43:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:08,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 172 [2021-11-07 01:43:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:08,683 INFO L225 Difference]: With dead ends: 44823 [2021-11-07 01:43:08,683 INFO L226 Difference]: Without dead ends: 23448 [2021-11-07 01:43:08,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23448 states. [2021-11-07 01:43:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23448 to 23183. [2021-11-07 01:43:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.3600155682407888) internal successors, (31449), 23182 states have internal predecessors, (31449), 0 states have call successors, (0), 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 01:43:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 31449 transitions. [2021-11-07 01:43:09,857 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 31449 transitions. Word has length 172 [2021-11-07 01:43:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:09,858 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 31449 transitions. [2021-11-07 01:43:09,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 01:43:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 31449 transitions. [2021-11-07 01:43:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-07 01:43:09,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:09,863 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:09,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:10,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:43:10,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:10,280 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:43:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash 504394176, now seen corresponding path program 1 times [2021-11-07 01:43:10,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:10,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420583171] [2021-11-07 01:43:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:10,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:10,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:10,289 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:10,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:43:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 3330 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:43:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:43:22,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:43:23,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:23,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420583171] [2021-11-07 01:43:23,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420583171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:23,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [413576191] [2021-11-07 01:43:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:23,426 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:23,426 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:23,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:43:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:27,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 3330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:43:29,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:43:30,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [413576191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:30,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:43:30,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:43:30,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398928854] [2021-11-07 01:43:30,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:30,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:30,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:30,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:30,638 INFO L87 Difference]: Start difference. First operand 23183 states and 31449 transitions. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 01:43:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:32,224 INFO L93 Difference]: Finished difference Result 46298 states and 62822 transitions. [2021-11-07 01:43:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 173 [2021-11-07 01:43:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:32,257 INFO L225 Difference]: With dead ends: 46298 [2021-11-07 01:43:32,258 INFO L226 Difference]: Without dead ends: 23183 [2021-11-07 01:43:32,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-07 01:43:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-07 01:43:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.3427607680332123) internal successors, (31050), 23182 states have internal predecessors, (31050), 0 states have call successors, (0), 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 01:43:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 31050 transitions. [2021-11-07 01:43:33,625 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 31050 transitions. Word has length 173 [2021-11-07 01:43:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:33,625 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 31050 transitions. [2021-11-07 01:43:33,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 01:43:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 31050 transitions. [2021-11-07 01:43:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:43:33,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:33,629 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:33,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:33,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:34,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:34,043 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:43:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1542813488, now seen corresponding path program 1 times [2021-11-07 01:43:34,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:34,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801373617] [2021-11-07 01:43:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:34,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:34,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:34,050 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:34,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:43:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 3331 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:43:46,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:43:46,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:43:47,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:47,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801373617] [2021-11-07 01:43:47,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801373617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:47,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [696448246] [2021-11-07 01:43:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:47,235 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:47,244 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:47,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:43:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:51,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 3331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:51,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:43:53,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:43:54,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [696448246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:54,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:43:54,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:43:54,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295247200] [2021-11-07 01:43:54,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:54,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:54,847 INFO L87 Difference]: Start difference. First operand 23183 states and 31050 transitions. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 01:43:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:56,403 INFO L93 Difference]: Finished difference Result 46298 states and 62024 transitions. [2021-11-07 01:43:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:56,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 174 [2021-11-07 01:43:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:56,429 INFO L225 Difference]: With dead ends: 46298 [2021-11-07 01:43:56,429 INFO L226 Difference]: Without dead ends: 23183 [2021-11-07 01:43:56,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:43:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-07 01:43:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-07 01:43:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.3255059678256358) internal successors, (30651), 23182 states have internal predecessors, (30651), 0 states have call successors, (0), 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 01:43:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 30651 transitions. [2021-11-07 01:43:57,697 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 30651 transitions. Word has length 174 [2021-11-07 01:43:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:57,697 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 30651 transitions. [2021-11-07 01:43:57,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 01:43:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 30651 transitions. [2021-11-07 01:43:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-07 01:43:57,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:57,701 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:57,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:57,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:43:58,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:58,117 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:43:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:58,117 INFO L85 PathProgramCache]: Analyzing trace with hash -581592677, now seen corresponding path program 1 times [2021-11-07 01:43:58,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:58,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652238931] [2021-11-07 01:43:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:58,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:58,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:58,123 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:58,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:44:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:10,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 3332 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:44:11,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:44:11,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:11,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652238931] [2021-11-07 01:44:11,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652238931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:11,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2034592378] [2021-11-07 01:44:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:11,746 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:11,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:11,769 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:11,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:44:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:16,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 3332 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:44:17,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:44:19,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2034592378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:19,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:19,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:44:19,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664529934] [2021-11-07 01:44:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:19,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:19,288 INFO L87 Difference]: Start difference. First operand 23183 states and 30651 transitions. Second operand has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:20,832 INFO L93 Difference]: Finished difference Result 46298 states and 61226 transitions. [2021-11-07 01:44:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:20,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 175 [2021-11-07 01:44:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:20,859 INFO L225 Difference]: With dead ends: 46298 [2021-11-07 01:44:20,859 INFO L226 Difference]: Without dead ends: 23183 [2021-11-07 01:44:20,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-07 01:44:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-07 01:44:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.3082511676180593) internal successors, (30252), 23182 states have internal predecessors, (30252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 30252 transitions. [2021-11-07 01:44:22,335 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 30252 transitions. Word has length 175 [2021-11-07 01:44:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:22,335 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 30252 transitions. [2021-11-07 01:44:22,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 30252 transitions. [2021-11-07 01:44:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-07 01:44:22,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:22,342 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:22,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:22,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-07 01:44:22,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:22,764 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:44:22,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash -848369653, now seen corresponding path program 1 times [2021-11-07 01:44:22,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:22,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764525778] [2021-11-07 01:44:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:22,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:22,770 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:22,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:44:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 3333 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:44:35,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:44:36,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:36,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764525778] [2021-11-07 01:44:36,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764525778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:36,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033877164] [2021-11-07 01:44:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:36,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:36,304 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:36,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:44:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:40,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 3333 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:40,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:44:42,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:44:44,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033877164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:44,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:44,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:44:44,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111889941] [2021-11-07 01:44:44,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:44,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:44,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:44,090 INFO L87 Difference]: Start difference. First operand 23183 states and 30252 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:45,664 INFO L93 Difference]: Finished difference Result 46298 states and 60428 transitions. [2021-11-07 01:44:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 176 [2021-11-07 01:44:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:45,693 INFO L225 Difference]: With dead ends: 46298 [2021-11-07 01:44:45,693 INFO L226 Difference]: Without dead ends: 23183 [2021-11-07 01:44:45,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-07 01:44:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-07 01:44:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.2909963674104825) internal successors, (29853), 23182 states have internal predecessors, (29853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 29853 transitions. [2021-11-07 01:44:47,234 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 29853 transitions. Word has length 176 [2021-11-07 01:44:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:47,234 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 29853 transitions. [2021-11-07 01:44:47,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 29853 transitions. [2021-11-07 01:44:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-07 01:44:47,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:47,237 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:47,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:47,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:44:47,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:47,638 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:44:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash -528372362, now seen corresponding path program 1 times [2021-11-07 01:44:47,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:47,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872635838] [2021-11-07 01:44:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:47,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:47,644 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:47,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:45:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:00,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 3334 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:00,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:45:00,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:45:01,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:01,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872635838] [2021-11-07 01:45:01,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872635838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:01,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901251109] [2021-11-07 01:45:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:01,556 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:01,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:01,557 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:01,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:45:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 3334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:45:07,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:45:09,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [901251109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:09,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:09,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:45:09,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614079219] [2021-11-07 01:45:09,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:09,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:09,543 INFO L87 Difference]: Start difference. First operand 23183 states and 29853 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:11,206 INFO L93 Difference]: Finished difference Result 46298 states and 59630 transitions. [2021-11-07 01:45:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:11,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 177 [2021-11-07 01:45:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:11,233 INFO L225 Difference]: With dead ends: 46298 [2021-11-07 01:45:11,233 INFO L226 Difference]: Without dead ends: 23183 [2021-11-07 01:45:11,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-07 01:45:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-07 01:45:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.273741567202906) internal successors, (29454), 23182 states have internal predecessors, (29454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 29454 transitions. [2021-11-07 01:45:12,844 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 29454 transitions. Word has length 177 [2021-11-07 01:45:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:12,845 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 29454 transitions. [2021-11-07 01:45:12,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 29454 transitions. [2021-11-07 01:45:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-07 01:45:12,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:12,847 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:12,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:13,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:13,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:13,252 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:45:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash 801758022, now seen corresponding path program 1 times [2021-11-07 01:45:13,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:13,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628411174] [2021-11-07 01:45:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:13,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:13,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:13,258 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:13,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:45:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:26,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 3335 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:26,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:45:26,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:45:27,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:27,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628411174] [2021-11-07 01:45:27,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628411174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:27,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385316304] [2021-11-07 01:45:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:27,238 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:27,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:27,238 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:27,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:45:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 3335 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:45:33,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:45:35,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1385316304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:35,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:35,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:45:35,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211202708] [2021-11-07 01:45:35,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:35,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:35,471 INFO L87 Difference]: Start difference. First operand 23183 states and 29454 transitions. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:37,214 INFO L93 Difference]: Finished difference Result 46298 states and 58832 transitions. [2021-11-07 01:45:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:37,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 178 [2021-11-07 01:45:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:37,252 INFO L225 Difference]: With dead ends: 46298 [2021-11-07 01:45:37,252 INFO L226 Difference]: Without dead ends: 23183 [2021-11-07 01:45:37,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-07 01:45:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-07 01:45:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.2564867669953295) internal successors, (29055), 23182 states have internal predecessors, (29055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 29055 transitions. [2021-11-07 01:45:38,951 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 29055 transitions. Word has length 178 [2021-11-07 01:45:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:38,952 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 29055 transitions. [2021-11-07 01:45:38,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 29055 transitions. [2021-11-07 01:45:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 01:45:38,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:38,955 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:38,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:39,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 01:45:39,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:39,355 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:45:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash -913724079, now seen corresponding path program 1 times [2021-11-07 01:45:39,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:39,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884651664] [2021-11-07 01:45:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:39,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:39,362 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:39,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:45:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:52,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 3336 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:45:53,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:45:53,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:53,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884651664] [2021-11-07 01:45:53,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884651664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:53,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [998432115] [2021-11-07 01:45:53,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:53,859 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:53,860 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:53,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:45:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 3336 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:46:00,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:46:02,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [998432115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:02,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:02,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:46:02,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871301370] [2021-11-07 01:46:02,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:02,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:02,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:02,216 INFO L87 Difference]: Start difference. First operand 23183 states and 29055 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:03,961 INFO L93 Difference]: Finished difference Result 46298 states and 58034 transitions. [2021-11-07 01:46:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 179 [2021-11-07 01:46:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:04,107 INFO L225 Difference]: With dead ends: 46298 [2021-11-07 01:46:04,107 INFO L226 Difference]: Without dead ends: 23183 [2021-11-07 01:46:04,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-07 01:46:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-07 01:46:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.239231966787753) internal successors, (28656), 23182 states have internal predecessors, (28656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 28656 transitions. [2021-11-07 01:46:05,662 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 28656 transitions. Word has length 179 [2021-11-07 01:46:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:05,662 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 28656 transitions. [2021-11-07 01:46:05,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 28656 transitions. [2021-11-07 01:46:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 01:46:05,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:05,666 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:05,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:05,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:06,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:06,069 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:46:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1741054593, now seen corresponding path program 1 times [2021-11-07 01:46:06,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:06,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128144493] [2021-11-07 01:46:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:06,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:06,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:06,075 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:06,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:46:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:19,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:46:19,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:46:20,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:20,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128144493] [2021-11-07 01:46:20,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128144493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:20,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [60446890] [2021-11-07 01:46:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:20,384 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:20,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:20,385 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:20,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:46:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:25,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:46:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:46:27,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:46:29,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [60446890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:29,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:29,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-07 01:46:29,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324342053] [2021-11-07 01:46:29,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:29,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:29,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:29,024 INFO L87 Difference]: Start difference. First operand 23183 states and 28656 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:30,967 INFO L93 Difference]: Finished difference Result 46298 states and 57236 transitions. [2021-11-07 01:46:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 180 [2021-11-07 01:46:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:30,990 INFO L225 Difference]: With dead ends: 46298 [2021-11-07 01:46:30,990 INFO L226 Difference]: Without dead ends: 23183 [2021-11-07 01:46:31,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-07 01:46:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-07 01:46:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.2219771665801764) internal successors, (28257), 23182 states have internal predecessors, (28257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 28257 transitions. [2021-11-07 01:46:32,622 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 28257 transitions. Word has length 180 [2021-11-07 01:46:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 28257 transitions. [2021-11-07 01:46:32,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 28257 transitions. [2021-11-07 01:46:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 01:46:32,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:32,625 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:32,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:32,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:33,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:33,026 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:46:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:33,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1741114175, now seen corresponding path program 1 times [2021-11-07 01:46:33,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:33,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778020518] [2021-11-07 01:46:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:33,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:33,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:33,032 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:33,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:46:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:46,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:46:46,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:46:47,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:47,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778020518] [2021-11-07 01:46:47,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778020518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:47,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [195376930] [2021-11-07 01:46:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:47,502 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:47,503 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:47,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:46:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:53,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:46:53,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:46:54,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [195376930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:54,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087051902] [2021-11-07 01:46:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:54,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:54,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:54,336 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:54,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 01:46:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:00,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:47:00,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:47:00,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:47:01,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087051902] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:47:01,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 01:47:01,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6, 6, 6, 6] total 15 [2021-11-07 01:47:01,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774906316] [2021-11-07 01:47:01,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:47:01,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:01,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:47:01,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:47:01,225 INFO L87 Difference]: Start difference. First operand 23183 states and 28257 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:07,350 INFO L93 Difference]: Finished difference Result 59827 states and 73358 transitions. [2021-11-07 01:47:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:47:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 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 180 [2021-11-07 01:47:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:07,428 INFO L225 Difference]: With dead ends: 59827 [2021-11-07 01:47:07,428 INFO L226 Difference]: Without dead ends: 59709 [2021-11-07 01:47:07,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:47:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59709 states. [2021-11-07 01:47:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59709 to 23105. [2021-11-07 01:47:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23105 states, 23100 states have (on average 1.2055844155844155) internal successors, (27849), 23104 states have internal predecessors, (27849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23105 states to 23105 states and 27849 transitions. [2021-11-07 01:47:09,896 INFO L78 Accepts]: Start accepts. Automaton has 23105 states and 27849 transitions. Word has length 180 [2021-11-07 01:47:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:09,896 INFO L470 AbstractCegarLoop]: Abstraction has 23105 states and 27849 transitions. [2021-11-07 01:47:09,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23105 states and 27849 transitions. [2021-11-07 01:47:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-07 01:47:09,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:09,912 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:10,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 01:47:10,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-07 01:47:10,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-07 01:47:10,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:10,523 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:47:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1554616817, now seen corresponding path program 1 times [2021-11-07 01:47:10,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:10,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649679413] [2021-11-07 01:47:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:10,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:10,531 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:10,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:47:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 4418 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:47:27,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:47:28,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:47:30,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:30,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649679413] [2021-11-07 01:47:30,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649679413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:30,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [610211039] [2021-11-07 01:47:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:30,152 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:30,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:30,153 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:30,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:47:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 4418 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:47:37,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:47:38,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [610211039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:38,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:47:38,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-07 01:47:38,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122243725] [2021-11-07 01:47:38,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:38,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:47:38,657 INFO L87 Difference]: Start difference. First operand 23105 states and 27849 transitions. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:43,979 INFO L93 Difference]: Finished difference Result 54522 states and 65639 transitions. [2021-11-07 01:47:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:43,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 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 381 [2021-11-07 01:47:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:44,017 INFO L225 Difference]: With dead ends: 54522 [2021-11-07 01:47:44,017 INFO L226 Difference]: Without dead ends: 31485 [2021-11-07 01:47:44,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1520 GetRequests, 1511 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:47:44,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31485 states. [2021-11-07 01:47:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31485 to 31329. [2021-11-07 01:47:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31329 states, 31324 states have (on average 1.2013791342101903) internal successors, (37632), 31328 states have internal predecessors, (37632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31329 states to 31329 states and 37632 transitions. [2021-11-07 01:47:47,211 INFO L78 Accepts]: Start accepts. Automaton has 31329 states and 37632 transitions. Word has length 381 [2021-11-07 01:47:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:47,212 INFO L470 AbstractCegarLoop]: Abstraction has 31329 states and 37632 transitions. [2021-11-07 01:47:47,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 31329 states and 37632 transitions. [2021-11-07 01:47:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-11-07 01:47:47,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:47,233 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:47,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:47,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:47,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:47,634 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-07 01:47:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1056070281, now seen corresponding path program 1 times [2021-11-07 01:47:47,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:47,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130418607] [2021-11-07 01:47:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:47,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:47,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:47,641 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:47,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:48:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:04,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 4437 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:48:04,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:48:05,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:48:07,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:07,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130418607] [2021-11-07 01:48:07,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130418607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:07,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [721838627] [2021-11-07 01:48:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:07,573 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:07,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:07,573 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:07,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ed160b8-34c6-46b1-b112-af3ab3a8705e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 01:48:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:14,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 4437 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:48:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:48:16,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:48:17,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [721838627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:17,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:17,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6] total 22 [2021-11-07 01:48:17,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464954778] [2021-11-07 01:48:17,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:48:17,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:17,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:48:17,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:48:17,656 INFO L87 Difference]: Start difference. First operand 31329 states and 37632 transitions. Second operand has 14 states, 14 states have (on average 27.714285714285715) internal successors, (388), 14 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)