./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.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_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/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_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/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_6bc95221-b078-470e-b506-94eed2f053d1/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 3ddf607d1745197f42ec93d91371fe3b581377117340b3a7d449f25d43cdec16 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:02:21,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:02:21,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:02:21,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:02:21,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:02:21,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:02:21,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:02:21,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:02:21,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:02:21,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:02:21,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:02:21,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:02:21,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:02:21,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:02:21,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:02:21,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:02:21,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:02:21,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:02:21,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:02:21,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:02:21,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:02:21,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:02:21,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:02:21,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:02:21,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:02:21,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:02:21,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:02:21,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:02:21,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:02:21,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:02:21,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:02:21,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:02:21,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:02:21,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:02:21,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:02:21,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:02:21,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:02:21,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:02:21,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:02:21,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:02:21,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:02:21,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:02:21,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:02:21,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:02:21,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:02:21,884 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:02:21,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:02:21,884 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:02:21,884 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:02:21,885 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:02:21,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:02:21,885 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:02:21,886 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:02:21,887 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:02:21,887 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:02:21,887 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:02:21,887 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:02:21,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:02:21,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:02:21,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:02:21,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:02:21,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:02:21,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:02:21,890 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:02:21,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:02:21,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:02:21,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:02:21,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:02:21,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:02:21,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:02:21,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:02:21,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:02:21,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:02:21,894 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:02:21,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:02:21,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:02:21,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:02:21,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:02:21,895 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_6bc95221-b078-470e-b506-94eed2f053d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ddf607d1745197f42ec93d91371fe3b581377117340b3a7d449f25d43cdec16 [2021-11-07 01:02:22,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:02:22,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:02:22,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:02:22,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:02:22,323 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:02:22,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-07 01:02:22,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data/59451fd9e/984c18993eda4001bb71c3780770683d/FLAGe31202fb4 [2021-11-07 01:02:23,672 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:02:23,673 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-07 01:02:23,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data/59451fd9e/984c18993eda4001bb71c3780770683d/FLAGe31202fb4 [2021-11-07 01:02:23,851 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data/59451fd9e/984c18993eda4001bb71c3780770683d [2021-11-07 01:02:23,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:02:23,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:02:23,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:02:23,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:02:23,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:02:23,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:23" (1/1) ... [2021-11-07 01:02:23,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ea756b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:23, skipping insertion in model container [2021-11-07 01:02:23,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:23" (1/1) ... [2021-11-07 01:02:23,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:02:24,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:02:26,285 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 01:02:26,298 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 01:02:26,644 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 01:02:26,976 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 01:02:26,998 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 01:02:27,032 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 01:02:27,041 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 01:02:27,050 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 01:02:27,061 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 01:02:27,079 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 01:02:27,110 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 01:02:27,112 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 01:02:27,131 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 01:02:27,154 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 01:02:27,155 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 01:02:27,170 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 01:02:27,199 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 01:02:27,203 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 01:02:27,204 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 01:02:27,222 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 01:02:27,297 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 01:02:27,298 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 01:02:27,298 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 01:02:27,299 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 01:02:27,300 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 01:02:27,308 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 01:02:27,309 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 01:02:27,316 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 01:02:27,323 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 01:02:27,333 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 01:02:27,354 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 01:02:27,355 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 01:02:27,374 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 01:02:27,396 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 01:02:27,405 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 01:02:27,415 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 01:02:27,441 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 01:02:27,448 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 01:02:27,472 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 01:02:27,472 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 01:02:27,475 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 01:02:27,482 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 01:02:27,490 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 01:02:27,515 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 01:02:27,581 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 01:02:27,585 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 01:02:27,594 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 01:02:27,614 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 01:02:27,630 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 01:02:27,638 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 01:02:27,649 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 01:02:27,657 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 01:02:27,667 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 01:02:27,680 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 01:02:28,134 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 01:02:28,135 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 01:02:28,136 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 01:02:28,137 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 01:02:28,139 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 01:02:28,140 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 01:02:28,173 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 01:02:28,174 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 01:02:28,174 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 01:02:28,174 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 01:02:28,195 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 01:02:28,196 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 01:02:28,205 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 01:02:28,209 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 01:02:28,210 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 01:02:28,254 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 01:02:28,270 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 01:02:29,175 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_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402050,402063] [2021-11-07 01:02:29,177 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_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402195,402208] [2021-11-07 01:02:29,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:02:29,241 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 01:02:29,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ca8a897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:29, skipping insertion in model container [2021-11-07 01:02:29,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:02:29,242 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:02:29,245 INFO L168 Benchmark]: Toolchain (without parser) took 5385.55 ms. Allocated memory was 117.4 MB in the beginning and 159.4 MB in the end (delta: 41.9 MB). Free memory was 86.7 MB in the beginning and 82.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 65.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:02:29,246 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 117.4 MB. Free memory was 95.1 MB in the beginning and 95.1 MB in the end (delta: 73.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:02:29,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 5380.40 ms. Allocated memory was 117.4 MB in the beginning and 159.4 MB in the end (delta: 41.9 MB). Free memory was 86.7 MB in the beginning and 82.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 65.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:02:29,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 117.4 MB. Free memory was 95.1 MB in the beginning and 95.1 MB in the end (delta: 73.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 5380.40 ms. Allocated memory was 117.4 MB in the beginning and 159.4 MB in the end (delta: 41.9 MB). Free memory was 86.7 MB in the beginning and 82.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 65.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6620]: 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_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/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_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/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_6bc95221-b078-470e-b506-94eed2f053d1/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 3ddf607d1745197f42ec93d91371fe3b581377117340b3a7d449f25d43cdec16 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:02:32,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:02:32,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:02:32,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:02:32,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:02:32,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:02:32,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:02:32,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:02:32,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:02:32,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:02:32,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:02:32,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:02:32,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:02:32,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:02:32,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:02:32,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:02:32,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:02:32,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:02:32,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:02:32,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:02:32,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:02:32,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:02:32,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:02:32,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:02:32,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:02:32,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:02:32,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:02:32,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:02:32,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:02:32,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:02:32,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:02:32,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:02:32,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:02:32,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:02:32,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:02:32,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:02:32,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:02:32,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:02:32,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:02:32,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:02:32,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:02:32,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:02:32,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:02:32,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:02:32,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:02:32,257 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:02:32,257 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:02:32,258 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:02:32,258 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:02:32,258 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:02:32,258 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:02:32,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:02:32,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:02:32,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:02:32,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:02:32,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:02:32,261 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:02:32,261 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:02:32,261 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:02:32,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:02:32,262 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:02:32,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:02:32,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:02:32,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:02:32,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:02:32,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:02:32,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:02:32,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:02:32,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:02:32,264 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:02:32,265 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:32,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:02:32,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:02:32,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:02:32,266 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_6bc95221-b078-470e-b506-94eed2f053d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ddf607d1745197f42ec93d91371fe3b581377117340b3a7d449f25d43cdec16 [2021-11-07 01:02:32,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:02:32,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:02:32,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:02:32,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:02:32,719 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:02:32,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-07 01:02:32,799 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data/c62a1fda8/c8a6e3449d634f9d9b8ceea81865fa07/FLAG2770469ab [2021-11-07 01:02:33,975 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:02:33,977 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-07 01:02:34,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data/c62a1fda8/c8a6e3449d634f9d9b8ceea81865fa07/FLAG2770469ab [2021-11-07 01:02:34,217 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/data/c62a1fda8/c8a6e3449d634f9d9b8ceea81865fa07 [2021-11-07 01:02:34,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:02:34,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:02:34,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:02:34,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:02:34,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:02:34,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:34" (1/1) ... [2021-11-07 01:02:34,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cfa1c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:34, skipping insertion in model container [2021-11-07 01:02:34,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:34" (1/1) ... [2021-11-07 01:02:34,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:02:34,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:02:39,683 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_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402050,402063] [2021-11-07 01:02:39,686 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_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402195,402208] [2021-11-07 01:02:39,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:02:39,801 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:02:39,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:02:40,427 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_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402050,402063] [2021-11-07 01:02:40,428 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_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402195,402208] [2021-11-07 01:02:40,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:02:40,490 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:02:41,034 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_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402050,402063] [2021-11-07 01:02:41,035 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_6bc95221-b078-470e-b506-94eed2f053d1/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402195,402208] [2021-11-07 01:02:41,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:02:41,401 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:02:41,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41 WrapperNode [2021-11-07 01:02:41,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:02:41,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:02:41,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:02:41,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:02:41,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:41,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:02:42,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:02:42,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:02:42,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:02:42,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:02:42,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:02:42,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:02:42,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:02:42,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (1/1) ... [2021-11-07 01:02:42,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:02:42,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:02:42,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:02:42,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:02:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:02:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:02:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:02:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:02:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:02:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:02:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:02:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:02:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:02:43,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:02:43,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:02:43,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:02:43,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:02:43,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:02:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:02:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:02:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:02:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:02:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:02:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:02:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:02:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:02:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:02:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:02:43,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:02:43,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:02:43,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:02:43,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:04:39,967 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_entry_EMGentry_20_returnLabel: main_#res := 0bv32; [2021-11-07 01:04:39,967 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L11385: #t~ret1430 := main_#res; [2021-11-07 01:04:39,967 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-07 01:04:40,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:04:40,034 INFO L299 CfgBuilder]: Removed 2820 assume(true) statements. [2021-11-07 01:04:40,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:40 BoogieIcfgContainer [2021-11-07 01:04:40,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:04:40,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:04:40,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:04:40,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:04:40,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:02:34" (1/3) ... [2021-11-07 01:04:40,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a555288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:40, skipping insertion in model container [2021-11-07 01:04:40,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:41" (2/3) ... [2021-11-07 01:04:40,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a555288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:40, skipping insertion in model container [2021-11-07 01:04:40,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:40" (3/3) ... [2021-11-07 01:04:40,055 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-07 01:04:40,063 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:04:40,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-07 01:04:40,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:04:40,191 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 01:04:40,192 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-07 01:04:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 2445 states, 2433 states have (on average 1.3596383066173447) internal successors, (3308), 2444 states have internal predecessors, (3308), 0 states have call successors, (0), 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 01:04:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:04:40,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:40,289 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, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:40,290 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:04:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash 646160627, now seen corresponding path program 1 times [2021-11-07 01:04:40,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:40,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469683020] [2021-11-07 01:04:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:40,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:40,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:40,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:04:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:47,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:04:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:48,200 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 01:04:48,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:49,140 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 01:04:49,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:49,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469683020] [2021-11-07 01:04:49,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469683020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:49,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:49,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-07 01:04:49,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266854345] [2021-11-07 01:04:49,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:04:49,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:04:49,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:04:49,187 INFO L87 Difference]: Start difference. First operand has 2445 states, 2433 states have (on average 1.3596383066173447) internal successors, (3308), 2444 states have internal predecessors, (3308), 0 states have call successors, (0), 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 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:04:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:51,714 INFO L93 Difference]: Finished difference Result 4878 states and 6595 transitions. [2021-11-07 01:04:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:04:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:04:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:51,753 INFO L225 Difference]: With dead ends: 4878 [2021-11-07 01:04:51,754 INFO L226 Difference]: Without dead ends: 2265 [2021-11-07 01:04:51,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:04:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-11-07 01:04:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2265. [2021-11-07 01:04:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2253 states have (on average 1.3062583222370172) internal successors, (2943), 2264 states have internal predecessors, (2943), 0 states have call successors, (0), 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 01:04:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 2943 transitions. [2021-11-07 01:04:51,995 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 2943 transitions. Word has length 76 [2021-11-07 01:04:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:51,996 INFO L470 AbstractCegarLoop]: Abstraction has 2265 states and 2943 transitions. [2021-11-07 01:04:51,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:04:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 2943 transitions. [2021-11-07 01:04:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:04:52,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:52,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:52,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:52,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:52,211 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:04:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1093533379, now seen corresponding path program 1 times [2021-11-07 01:04:52,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:52,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024595380] [2021-11-07 01:04:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:52,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:52,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:52,227 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:52,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:04:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:59,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:59,489 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 01:04:59,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:00,022 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 01:05:00,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:00,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024595380] [2021-11-07 01:05:00,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024595380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:00,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:00,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:05:00,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370045110] [2021-11-07 01:05:00,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:00,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:00,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:00,027 INFO L87 Difference]: Start difference. First operand 2265 states and 2943 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 01:05:00,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:00,145 INFO L93 Difference]: Finished difference Result 4524 states and 5879 transitions. [2021-11-07 01:05:00,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:00,147 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 86 [2021-11-07 01:05:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:00,167 INFO L225 Difference]: With dead ends: 4524 [2021-11-07 01:05:00,168 INFO L226 Difference]: Without dead ends: 2265 [2021-11-07 01:05:00,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 168 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 01:05:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-11-07 01:05:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2265. [2021-11-07 01:05:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2253 states have (on average 1.305814469596094) internal successors, (2942), 2264 states have internal predecessors, (2942), 0 states have call successors, (0), 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 01:05:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 2942 transitions. [2021-11-07 01:05:00,264 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 2942 transitions. Word has length 86 [2021-11-07 01:05:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:00,264 INFO L470 AbstractCegarLoop]: Abstraction has 2265 states and 2942 transitions. [2021-11-07 01:05:00,265 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 01:05:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 2942 transitions. [2021-11-07 01:05:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:05:00,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:00,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:00,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:00,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:00,485 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:05:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash -35695301, now seen corresponding path program 1 times [2021-11-07 01:05:00,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:00,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384928742] [2021-11-07 01:05:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:00,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:00,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:00,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:00,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:05:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:07,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:05:07,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:08,282 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 01:05:08,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:08,896 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 01:05:08,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:08,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384928742] [2021-11-07 01:05:08,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384928742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:08,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:08,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 14 [2021-11-07 01:05:08,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308937879] [2021-11-07 01:05:08,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:05:08,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:05:08,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:05:08,900 INFO L87 Difference]: Start difference. First operand 2265 states and 2942 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 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 01:05:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:11,607 INFO L93 Difference]: Finished difference Result 3078 states and 4034 transitions. [2021-11-07 01:05:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:05:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 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 86 [2021-11-07 01:05:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:11,625 INFO L225 Difference]: With dead ends: 3078 [2021-11-07 01:05:11,625 INFO L226 Difference]: Without dead ends: 2263 [2021-11-07 01:05:11,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:05:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-11-07 01:05:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2263. [2021-11-07 01:05:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2251 states have (on average 1.3056419369169259) internal successors, (2939), 2262 states have internal predecessors, (2939), 0 states have call successors, (0), 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 01:05:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 2939 transitions. [2021-11-07 01:05:11,715 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 2939 transitions. Word has length 86 [2021-11-07 01:05:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:11,717 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 2939 transitions. [2021-11-07 01:05:11,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 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 01:05:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 2939 transitions. [2021-11-07 01:05:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:05:11,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:11,724 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, 1, 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 01:05:11,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:11,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:11,937 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:05:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1694907109, now seen corresponding path program 1 times [2021-11-07 01:05:11,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:11,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337121565] [2021-11-07 01:05:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:11,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:11,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:11,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:11,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:05:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1882 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 01:05:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:19,391 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 01:05:19,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:20,240 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 01:05:20,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:20,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337121565] [2021-11-07 01:05:20,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337121565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:20,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:20,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-07 01:05:20,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457833843] [2021-11-07 01:05:20,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:05:20,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:05:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:05:20,245 INFO L87 Difference]: Start difference. First operand 2263 states and 2939 transitions. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 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 01:05:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:23,865 INFO L93 Difference]: Finished difference Result 12294 states and 16086 transitions. [2021-11-07 01:05:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:05:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 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 95 [2021-11-07 01:05:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:23,939 INFO L225 Difference]: With dead ends: 12294 [2021-11-07 01:05:23,940 INFO L226 Difference]: Without dead ends: 10063 [2021-11-07 01:05:23,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:05:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10063 states. [2021-11-07 01:05:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10063 to 2267. [2021-11-07 01:05:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.30509977827051) internal successors, (2943), 2266 states have internal predecessors, (2943), 0 states have call successors, (0), 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 01:05:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2943 transitions. [2021-11-07 01:05:24,121 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2943 transitions. Word has length 95 [2021-11-07 01:05:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:24,127 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2943 transitions. [2021-11-07 01:05:24,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 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 01:05:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2943 transitions. [2021-11-07 01:05:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:05:24,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:24,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:24,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:05:24,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:24,345 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:05:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1587970347, now seen corresponding path program 1 times [2021-11-07 01:05:24,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:24,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968746369] [2021-11-07 01:05:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:24,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:24,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:24,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:05:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:31,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:32,228 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 01:05:32,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:33,076 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 01:05:33,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:33,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968746369] [2021-11-07 01:05:33,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968746369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:33,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:33,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:05:33,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497156455] [2021-11-07 01:05:33,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:33,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:33,079 INFO L87 Difference]: Start difference. First operand 2267 states and 2943 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 01:05:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:33,242 INFO L93 Difference]: Finished difference Result 4502 states and 5853 transitions. [2021-11-07 01:05:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:33,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 111 [2021-11-07 01:05:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:33,261 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:05:33,262 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:05:33,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 218 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 01:05:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:05:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:05:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.2997782705099779) internal successors, (2931), 2266 states have internal predecessors, (2931), 0 states have call successors, (0), 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 01:05:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2931 transitions. [2021-11-07 01:05:33,363 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2931 transitions. Word has length 111 [2021-11-07 01:05:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:33,366 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2931 transitions. [2021-11-07 01:05:33,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 01:05:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2931 transitions. [2021-11-07 01:05:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:05:33,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:33,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:33,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:33,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:33,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:05:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1982085245, now seen corresponding path program 1 times [2021-11-07 01:05:33,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:33,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6642009] [2021-11-07 01:05:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:33,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:33,604 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:33,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:05:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:40,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:41,268 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 01:05:41,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:42,096 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 01:05:42,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:42,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6642009] [2021-11-07 01:05:42,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6642009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:42,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:42,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:05:42,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028160673] [2021-11-07 01:05:42,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:42,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:42,099 INFO L87 Difference]: Start difference. First operand 2267 states and 2931 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 01:05:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:42,238 INFO L93 Difference]: Finished difference Result 4502 states and 5829 transitions. [2021-11-07 01:05:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:42,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 112 [2021-11-07 01:05:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:42,252 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:05:42,253 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:05:42,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 220 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 01:05:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:05:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:05:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.2944567627494457) internal successors, (2919), 2266 states have internal predecessors, (2919), 0 states have call successors, (0), 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 01:05:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2919 transitions. [2021-11-07 01:05:42,372 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2919 transitions. Word has length 112 [2021-11-07 01:05:42,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:42,373 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2919 transitions. [2021-11-07 01:05:42,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 01:05:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2919 transitions. [2021-11-07 01:05:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:05:42,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:42,378 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:42,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:42,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:42,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:05:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1314894150, now seen corresponding path program 1 times [2021-11-07 01:05:42,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:42,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936729997] [2021-11-07 01:05:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:42,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:42,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:42,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:42,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:05:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:49,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:50,211 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 01:05:50,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:51,009 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 01:05:51,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:51,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936729997] [2021-11-07 01:05:51,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936729997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:51,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:51,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:05:51,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400207478] [2021-11-07 01:05:51,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:51,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:51,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:51,014 INFO L87 Difference]: Start difference. First operand 2267 states and 2919 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 01:05:51,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:51,200 INFO L93 Difference]: Finished difference Result 4502 states and 5805 transitions. [2021-11-07 01:05:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:51,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 113 [2021-11-07 01:05:51,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:51,218 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:05:51,220 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:05:51,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 222 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 01:05:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:05:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:05:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.2891352549889135) internal successors, (2907), 2266 states have internal predecessors, (2907), 0 states have call successors, (0), 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 01:05:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2907 transitions. [2021-11-07 01:05:51,351 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2907 transitions. Word has length 113 [2021-11-07 01:05:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:51,351 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2907 transitions. [2021-11-07 01:05:51,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 01:05:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2907 transitions. [2021-11-07 01:05:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 01:05:51,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:51,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:51,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:51,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:51,580 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:05:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2106955640, now seen corresponding path program 1 times [2021-11-07 01:05:51,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:51,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655088910] [2021-11-07 01:05:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:51,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:51,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:51,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:05:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:58,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:59,387 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 01:05:59,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:00,217 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 01:06:00,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:00,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655088910] [2021-11-07 01:06:00,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655088910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:00,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:00,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:06:00,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063084293] [2021-11-07 01:06:00,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:00,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:00,220 INFO L87 Difference]: Start difference. First operand 2267 states and 2907 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 01:06:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:00,422 INFO L93 Difference]: Finished difference Result 4502 states and 5781 transitions. [2021-11-07 01:06:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:00,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 114 [2021-11-07 01:06:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:00,438 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:06:00,439 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:06:00,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 224 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 01:06:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:06:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:06:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.2838137472283815) internal successors, (2895), 2266 states have internal predecessors, (2895), 0 states have call successors, (0), 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 01:06:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2895 transitions. [2021-11-07 01:06:00,600 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2895 transitions. Word has length 114 [2021-11-07 01:06:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:00,601 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2895 transitions. [2021-11-07 01:06:00,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 01:06:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2895 transitions. [2021-11-07 01:06:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 01:06:00,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:00,605 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:00,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:00,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:00,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:06:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash 891207009, now seen corresponding path program 1 times [2021-11-07 01:06:00,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:00,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952675978] [2021-11-07 01:06:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:00,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:00,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:00,826 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:00,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:06:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:07,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:07,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:08,673 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 01:06:08,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:09,491 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 01:06:09,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:09,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952675978] [2021-11-07 01:06:09,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952675978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:09,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:09,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:06:09,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981369408] [2021-11-07 01:06:09,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:09,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:09,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:09,495 INFO L87 Difference]: Start difference. First operand 2267 states and 2895 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 01:06:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:09,641 INFO L93 Difference]: Finished difference Result 4502 states and 5757 transitions. [2021-11-07 01:06:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-07 01:06:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:09,655 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:06:09,656 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:06:09,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 226 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 01:06:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:06:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:06:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.2784922394678493) internal successors, (2883), 2266 states have internal predecessors, (2883), 0 states have call successors, (0), 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 01:06:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2883 transitions. [2021-11-07 01:06:09,814 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2883 transitions. Word has length 115 [2021-11-07 01:06:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:09,814 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2883 transitions. [2021-11-07 01:06:09,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 01:06:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2883 transitions. [2021-11-07 01:06:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 01:06:09,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:09,819 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:09,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:10,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:10,045 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:06:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1857854067, now seen corresponding path program 1 times [2021-11-07 01:06:10,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:10,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951857355] [2021-11-07 01:06:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:10,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:10,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:10,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:06:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:17,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:17,979 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 01:06:17,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:18,786 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 01:06:18,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:18,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951857355] [2021-11-07 01:06:18,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951857355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:18,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:18,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:06:18,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989988078] [2021-11-07 01:06:18,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:18,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:18,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:18,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:18,789 INFO L87 Difference]: Start difference. First operand 2267 states and 2883 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 01:06:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:18,945 INFO L93 Difference]: Finished difference Result 4502 states and 5733 transitions. [2021-11-07 01:06:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 116 [2021-11-07 01:06:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:18,955 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:06:18,955 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:06:18,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 228 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 01:06:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:06:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:06:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.273170731707317) internal successors, (2871), 2266 states have internal predecessors, (2871), 0 states have call successors, (0), 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 01:06:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2871 transitions. [2021-11-07 01:06:19,118 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2871 transitions. Word has length 116 [2021-11-07 01:06:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:19,119 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2871 transitions. [2021-11-07 01:06:19,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 01:06:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2871 transitions. [2021-11-07 01:06:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:06:19,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:19,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:19,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:19,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:19,341 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:06:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:19,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1759290748, now seen corresponding path program 1 times [2021-11-07 01:06:19,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:19,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415815078] [2021-11-07 01:06:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:19,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:19,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:19,350 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:19,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:06:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:26,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:27,280 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 01:06:27,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:28,119 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 01:06:28,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:28,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415815078] [2021-11-07 01:06:28,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415815078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:28,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:28,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:06:28,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352081879] [2021-11-07 01:06:28,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:28,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:28,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:28,122 INFO L87 Difference]: Start difference. First operand 2267 states and 2871 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 01:06:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:28,281 INFO L93 Difference]: Finished difference Result 4502 states and 5709 transitions. [2021-11-07 01:06:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 117 [2021-11-07 01:06:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:28,289 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:06:28,289 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:06:28,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 230 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 01:06:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:06:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:06:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.267849223946785) internal successors, (2859), 2266 states have internal predecessors, (2859), 0 states have call successors, (0), 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 01:06:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2859 transitions. [2021-11-07 01:06:28,443 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2859 transitions. Word has length 117 [2021-11-07 01:06:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:28,443 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2859 transitions. [2021-11-07 01:06:28,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 01:06:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2859 transitions. [2021-11-07 01:06:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:06:28,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:28,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:28,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:28,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:28,660 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:06:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1296023186, now seen corresponding path program 1 times [2021-11-07 01:06:28,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:28,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165252364] [2021-11-07 01:06:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:28,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:28,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:28,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:28,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:06:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:35,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:36,833 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 01:06:36,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:37,677 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 01:06:37,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:37,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165252364] [2021-11-07 01:06:37,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165252364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:37,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:37,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:06:37,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724163891] [2021-11-07 01:06:37,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:37,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:37,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:37,680 INFO L87 Difference]: Start difference. First operand 2267 states and 2859 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 01:06:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:37,926 INFO L93 Difference]: Finished difference Result 4502 states and 5685 transitions. [2021-11-07 01:06:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:37,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 118 [2021-11-07 01:06:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:37,932 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:06:37,932 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:06:37,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 232 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 01:06:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:06:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:06:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.2625277161862527) internal successors, (2847), 2266 states have internal predecessors, (2847), 0 states have call successors, (0), 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 01:06:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2847 transitions. [2021-11-07 01:06:38,064 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2847 transitions. Word has length 118 [2021-11-07 01:06:38,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:38,065 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2847 transitions. [2021-11-07 01:06:38,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 01:06:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2847 transitions. [2021-11-07 01:06:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:06:38,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:38,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:38,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:38,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:38,284 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:06:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:38,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1521325673, now seen corresponding path program 1 times [2021-11-07 01:06:38,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:38,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912937737] [2021-11-07 01:06:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:38,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:38,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:38,289 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:38,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:06:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:45,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1857 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:46,453 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 01:06:46,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:47,277 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 01:06:47,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:47,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912937737] [2021-11-07 01:06:47,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912937737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:47,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:47,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:06:47,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133762799] [2021-11-07 01:06:47,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:47,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:47,280 INFO L87 Difference]: Start difference. First operand 2267 states and 2847 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 01:06:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:47,457 INFO L93 Difference]: Finished difference Result 4502 states and 5661 transitions. [2021-11-07 01:06:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 119 [2021-11-07 01:06:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:47,462 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:06:47,462 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:06:47,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 234 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 01:06:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:06:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:06:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.2572062084257207) internal successors, (2835), 2266 states have internal predecessors, (2835), 0 states have call successors, (0), 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 01:06:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2835 transitions. [2021-11-07 01:06:47,659 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2835 transitions. Word has length 119 [2021-11-07 01:06:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:47,660 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2835 transitions. [2021-11-07 01:06:47,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 01:06:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2835 transitions. [2021-11-07 01:06:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 01:06:47,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:47,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:47,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:47,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:47,881 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:06:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash 84380777, now seen corresponding path program 1 times [2021-11-07 01:06:47,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:47,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532674594] [2021-11-07 01:06:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:47,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:47,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:47,887 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:47,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:06:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:54,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:55,674 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 01:06:55,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:56,490 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 01:06:56,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:56,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532674594] [2021-11-07 01:06:56,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532674594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:56,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:56,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:06:56,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435079121] [2021-11-07 01:06:56,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:56,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:56,492 INFO L87 Difference]: Start difference. First operand 2267 states and 2835 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 01:06:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:56,660 INFO L93 Difference]: Finished difference Result 4502 states and 5637 transitions. [2021-11-07 01:06:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 120 [2021-11-07 01:06:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:56,665 INFO L225 Difference]: With dead ends: 4502 [2021-11-07 01:06:56,665 INFO L226 Difference]: Without dead ends: 2267 [2021-11-07 01:06:56,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 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 01:06:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-07 01:06:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-07 01:06:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2255 states have (on average 1.2518847006651885) internal successors, (2823), 2266 states have internal predecessors, (2823), 0 states have call successors, (0), 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 01:06:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2823 transitions. [2021-11-07 01:06:56,837 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2823 transitions. Word has length 120 [2021-11-07 01:06:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:56,837 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2823 transitions. [2021-11-07 01:06:56,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 01:06:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2823 transitions. [2021-11-07 01:06:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:06:56,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:56,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:56,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:57,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:57,057 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:06:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1678177870, now seen corresponding path program 1 times [2021-11-07 01:06:57,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:57,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006037343] [2021-11-07 01:06:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:57,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:57,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:57,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:57,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc95221-b078-470e-b506-94eed2f053d1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process