./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF --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 161acb090810893f5857465330b1e9af98cd436d8b1ab4337fc3709fda2d3260 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:35:06,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:35:06,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:35:06,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:35:06,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:35:06,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:35:06,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:35:06,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:35:06,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:35:06,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:35:06,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:35:06,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:35:06,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:35:06,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:35:06,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:35:06,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:35:06,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:35:06,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:35:06,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:35:06,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:35:06,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:35:06,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:35:06,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:35:06,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:35:06,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:35:06,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:35:06,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:35:06,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:35:06,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:35:06,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:35:06,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:35:06,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:35:06,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:35:06,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:35:06,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:35:06,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:35:06,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:35:06,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:35:06,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:35:06,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:35:06,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:35:06,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:35:06,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:35:06,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:35:06,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:35:06,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:35:06,865 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:35:06,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:35:06,877 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:35:06,878 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:35:06,878 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:35:06,878 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:35:06,879 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:35:06,880 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:35:06,880 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:35:06,880 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:35:06,880 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:35:06,881 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:35:06,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:35:06,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:35:06,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:35:06,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:35:06,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:35:06,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:35:06,883 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:35:06,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:35:06,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:35:06,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:35:06,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:35:06,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:35:06,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:35:06,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:35:06,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:35:06,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:35:06,887 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:35:06,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:35:06,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:35:06,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:35:06,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:35:06,888 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_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 161acb090810893f5857465330b1e9af98cd436d8b1ab4337fc3709fda2d3260 [2021-11-13 02:35:07,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:35:07,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:35:07,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:35:07,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:35:07,235 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:35:07,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i [2021-11-13 02:35:07,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data/8d261cf19/940230d4ede949259a9e753af2c7a086/FLAGfde3c47e6 [2021-11-13 02:35:08,312 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:35:08,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i [2021-11-13 02:35:08,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data/8d261cf19/940230d4ede949259a9e753af2c7a086/FLAGfde3c47e6 [2021-11-13 02:35:08,714 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data/8d261cf19/940230d4ede949259a9e753af2c7a086 [2021-11-13 02:35:08,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:35:08,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:35:08,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:08,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:35:08,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:35:08,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:08" (1/1) ... [2021-11-13 02:35:08,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@766f7402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:08, skipping insertion in model container [2021-11-13 02:35:08,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:08" (1/1) ... [2021-11-13 02:35:08,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:35:08,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:35:09,585 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name match at C: (*match)(struct device * , struct v4l2_async_subdev * ) [4482] [2021-11-13 02:35:09,878 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,093 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_d9bd3e1e-92df-44dc-9757-af5c75a6040b/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i[155153,155166] [2021-11-13 02:35:10,321 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,327 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,340 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,438 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,445 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,640 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,647 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,655 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,661 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,671 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,707 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,713 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,720 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,728 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,736 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,742 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,748 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,756 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,763 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,777 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,786 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,792 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,799 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,806 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,811 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,816 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,822 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,829 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,849 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,863 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,881 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,889 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,905 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,935 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,938 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,941 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,962 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,963 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,963 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,964 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,965 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,965 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,965 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,966 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,973 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,974 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,975 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,975 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,976 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,977 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,978 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,978 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,979 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,980 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,980 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,981 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,981 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,982 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,983 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:10,984 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:11,081 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-13 02:35:11,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:35:11,227 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) [2021-11-13 02:35:11,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b971c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:11, skipping insertion in model container [2021-11-13 02:35:11,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:11,229 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:35:11,233 INFO L158 Benchmark]: Toolchain (without parser) took 2511.28ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 56.4MB in the beginning and 75.8MB in the end (delta: -19.4MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. [2021-11-13 02:35:11,234 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 88.1MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:35:11,235 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2508.24ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 56.1MB in the beginning and 75.8MB in the end (delta: -19.7MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. [2021-11-13 02:35:11,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 88.1MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2508.24ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 56.1MB in the beginning and 75.8MB in the end (delta: -19.7MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5096]: 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_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF --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 161acb090810893f5857465330b1e9af98cd436d8b1ab4337fc3709fda2d3260 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:35:13,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:35:13,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:35:13,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:35:13,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:35:13,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:35:13,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:35:13,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:35:13,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:35:13,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:35:13,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:35:13,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:35:13,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:35:13,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:35:13,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:35:13,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:35:13,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:35:13,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:35:13,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:35:13,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:35:13,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:35:13,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:35:13,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:35:13,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:35:13,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:35:13,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:35:13,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:35:13,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:35:13,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:35:13,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:35:13,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:35:13,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:35:13,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:35:13,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:35:13,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:35:13,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:35:13,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:35:13,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:35:13,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:35:13,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:35:13,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:35:13,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:35:14,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:35:14,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:35:14,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:35:14,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:35:14,044 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:35:14,044 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:35:14,045 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:35:14,045 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:35:14,046 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:35:14,046 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:35:14,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:35:14,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:35:14,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:35:14,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:35:14,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:35:14,050 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:35:14,050 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:35:14,050 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:35:14,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:35:14,051 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:35:14,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:35:14,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:35:14,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:35:14,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:35:14,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:35:14,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:35:14,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:35:14,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:35:14,053 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:35:14,053 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:14,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:35:14,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:35:14,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:35:14,054 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_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 161acb090810893f5857465330b1e9af98cd436d8b1ab4337fc3709fda2d3260 [2021-11-13 02:35:14,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:35:14,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:35:14,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:35:14,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:35:14,536 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:35:14,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i [2021-11-13 02:35:14,618 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data/81134834a/727c2e1f78414fa5b676465d3fee26c7/FLAG6423423e4 [2021-11-13 02:35:15,742 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:35:15,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i [2021-11-13 02:35:15,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data/81134834a/727c2e1f78414fa5b676465d3fee26c7/FLAG6423423e4 [2021-11-13 02:35:16,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/data/81134834a/727c2e1f78414fa5b676465d3fee26c7 [2021-11-13 02:35:16,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:35:16,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:35:16,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:16,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:35:16,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:35:16,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:16" (1/1) ... [2021-11-13 02:35:16,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f48a68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:16, skipping insertion in model container [2021-11-13 02:35:16,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:16" (1/1) ... [2021-11-13 02:35:16,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:35:16,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:35:16,888 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name match at C: (*match)(struct device * , struct v4l2_async_subdev * ) [4482] [2021-11-13 02:35:17,451 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_d9bd3e1e-92df-44dc-9757-af5c75a6040b/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i[155153,155166] [2021-11-13 02:35:18,586 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-13 02:35:18,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:35:18,712 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:35:18,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:35:18,935 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name match at C: (*match)(struct device * , struct v4l2_async_subdev * ) [4482] [2021-11-13 02:35:18,971 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_d9bd3e1e-92df-44dc-9757-af5c75a6040b/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i[155153,155166] [2021-11-13 02:35:19,285 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-13 02:35:19,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:35:19,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:35:19,563 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name match at C: (*match)(struct device * , struct v4l2_async_subdev * ) [4482] [2021-11-13 02:35:19,615 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_d9bd3e1e-92df-44dc-9757-af5c75a6040b/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i[155153,155166] [2021-11-13 02:35:20,230 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-13 02:35:20,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:35:20,360 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:35:20,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20 WrapperNode [2021-11-13 02:35:20,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:20,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:35:20,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:35:20,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:35:20,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:20,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:20,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:35:20,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:35:20,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:35:20,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:35:20,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:20,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:20,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:20,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:20,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:20,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:21,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:21,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:35:21,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:35:21,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:35:21,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:35:21,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (1/1) ... [2021-11-13 02:35:21,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:35:21,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:21,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:35:21,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:35:21,164 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-13 02:35:21,164 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-13 02:35:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:35:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure wxh_to_mode [2021-11-13 02:35:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure wxh_to_mode [2021-11-13 02:35:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure PDEBUG_MODE [2021-11-13 02:35:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure PDEBUG_MODE [2021-11-13 02:35:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:35:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:35:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 02:35:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 02:35:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 02:35:21,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 02:35:21,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 02:35:21,167 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2021-11-13 02:35:21,167 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2021-11-13 02:35:21,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-13 02:35:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-13 02:35:21,168 INFO L130 BoogieDeclarations]: Found specification of procedure frame_free [2021-11-13 02:35:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure frame_free [2021-11-13 02:35:21,168 INFO L130 BoogieDeclarations]: Found specification of procedure alt_xfer [2021-11-13 02:35:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_xfer [2021-11-13 02:35:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_streamon [2021-11-13 02:35:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_streamon [2021-11-13 02:35:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-13 02:35:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-13 02:35:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure dev_mmap [2021-11-13 02:35:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_mmap [2021-11-13 02:35:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure usb_make_path [2021-11-13 02:35:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_make_path [2021-11-13 02:35:21,171 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 02:35:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 02:35:21,171 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-13 02:35:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-13 02:35:21,172 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_streamoff [2021-11-13 02:35:21,172 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_streamoff [2021-11-13 02:35:21,172 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_init_transfer [2021-11-13 02:35:21,172 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_init_transfer [2021-11-13 02:35:21,172 INFO L130 BoogieDeclarations]: Found specification of procedure dev_poll [2021-11-13 02:35:21,173 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_poll [2021-11-13 02:35:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2021-11-13 02:35:21,173 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2021-11-13 02:35:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_reqbufs [2021-11-13 02:35:21,174 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_reqbufs [2021-11-13 02:35:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure frame_ready_nolock [2021-11-13 02:35:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure frame_ready_nolock [2021-11-13 02:35:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 02:35:21,176 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 02:35:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 02:35:21,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 02:35:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure frame_ready [2021-11-13 02:35:21,177 INFO L138 BoogieDeclarations]: Found implementation of procedure frame_ready [2021-11-13 02:35:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-13 02:35:21,178 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-13 02:35:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~VOID [2021-11-13 02:35:21,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~VOID [2021-11-13 02:35:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-13 02:35:21,180 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-13 02:35:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 02:35:21,180 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 02:35:21,181 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:35:21,181 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:35:21,181 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_set_alt0 [2021-11-13 02:35:21,181 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_set_alt0 [2021-11-13 02:35:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure bulk_irq [2021-11-13 02:35:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure bulk_irq [2021-11-13 02:35:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-13 02:35:21,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-13 02:35:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure video_drvdata [2021-11-13 02:35:21,183 INFO L138 BoogieDeclarations]: Found implementation of procedure video_drvdata [2021-11-13 02:35:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2021-11-13 02:35:21,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2021-11-13 02:35:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:35:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-13 02:35:21,184 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-13 02:35:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-13 02:35:21,185 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-13 02:35:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:35:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_12 [2021-11-13 02:35:21,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_12 [2021-11-13 02:35:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-13 02:35:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_handler_free [2021-11-13 02:35:21,187 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_handler_free [2021-11-13 02:35:21,187 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_submit_int_urb [2021-11-13 02:35:21,187 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_submit_int_urb [2021-11-13 02:35:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-13 02:35:21,188 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-13 02:35:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-13 02:35:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-13 02:35:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure int_irq [2021-11-13 02:35:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure int_irq [2021-11-13 02:35:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_handler_setup [2021-11-13 02:35:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_handler_setup [2021-11-13 02:35:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:35:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:35:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 02:35:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:35:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:35:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:35:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 02:35:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:35:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 02:35:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 02:35:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure fill_frame [2021-11-13 02:35:21,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_frame [2021-11-13 02:35:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure read_alloc [2021-11-13 02:35:21,193 INFO L138 BoogieDeclarations]: Found implementation of procedure read_alloc [2021-11-13 02:35:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_stream_off [2021-11-13 02:35:21,197 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_stream_off [2021-11-13 02:35:21,198 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 02:35:21,199 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 02:35:21,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 02:35:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 02:35:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure isoc_irq [2021-11-13 02:35:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure isoc_irq [2021-11-13 02:35:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_dqbuf [2021-11-13 02:35:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_dqbuf [2021-11-13 02:35:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_input_create_urb [2021-11-13 02:35:21,208 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_input_create_urb [2021-11-13 02:35:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure ns_to_timeval [2021-11-13 02:35:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_to_timeval [2021-11-13 02:35:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure video_ioctl2 [2021-11-13 02:35:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure video_ioctl2 [2021-11-13 02:35:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure video_device_release_empty [2021-11-13 02:35:21,210 INFO L138 BoogieDeclarations]: Found implementation of procedure video_device_release_empty [2021-11-13 02:35:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-11-13 02:35:21,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-11-13 02:35:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_8 [2021-11-13 02:35:21,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_8 [2021-11-13 02:35:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_5 [2021-11-13 02:35:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_5 [2021-11-13 02:35:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_9 [2021-11-13 02:35:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_9 [2021-11-13 02:35:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_input_destroy_urb [2021-11-13 02:35:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_input_destroy_urb [2021-11-13 02:35:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 02:35:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 02:35:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 02:35:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 02:35:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-13 02:35:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-13 02:35:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 02:35:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 02:35:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2021-11-13 02:35:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2021-11-13 02:35:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 02:35:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 02:35:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-13 02:35:21,214 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-13 02:35:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 02:35:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_subscribe_event [2021-11-13 02:35:21,214 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_subscribe_event [2021-11-13 02:35:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 02:35:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 02:35:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 02:35:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 02:35:21,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 02:35:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:35:21,216 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_urbs [2021-11-13 02:35:21,216 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_urbs [2021-11-13 02:35:21,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 02:35:21,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 02:35:21,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:35:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 02:35:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 02:35:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 02:35:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure try_fmt_vid_cap [2021-11-13 02:35:21,217 INFO L138 BoogieDeclarations]: Found implementation of procedure try_fmt_vid_cap [2021-11-13 02:35:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 02:35:21,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 02:35:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 02:35:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-13 02:35:21,218 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-13 02:35:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure dev_open [2021-11-13 02:35:21,219 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_open [2021-11-13 02:35:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_vm_close [2021-11-13 02:35:21,219 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_vm_close [2021-11-13 02:35:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-13 02:35:21,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-13 02:35:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_qbuf [2021-11-13 02:35:21,220 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_qbuf [2021-11-13 02:35:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~C_INT [2021-11-13 02:35:21,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~C_INT [2021-11-13 02:35:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_event_unsubscribe [2021-11-13 02:35:21,222 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_event_unsubscribe [2021-11-13 02:35:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-13 02:35:21,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-13 02:35:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 02:35:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-13 02:35:21,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-13 02:35:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_vm_open [2021-11-13 02:35:21,223 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_vm_open [2021-11-13 02:35:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:35:21,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:35:22,645 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 02:35:37,117 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-13 02:36:03,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:36:03,083 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:36:03,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:36:03 BoogieIcfgContainer [2021-11-13 02:36:03,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:36:03,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:36:03,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:36:03,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:36:03,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:35:16" (1/3) ... [2021-11-13 02:36:03,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b669c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:36:03, skipping insertion in model container [2021-11-13 02:36:03,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:20" (2/3) ... [2021-11-13 02:36:03,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b669c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:36:03, skipping insertion in model container [2021-11-13 02:36:03,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:36:03" (3/3) ... [2021-11-13 02:36:03,110 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--gspca--gspca_main.ko-entry_point.cil.out.i [2021-11-13 02:36:03,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:36:03,132 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:36:03,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:36:03,224 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 [2021-11-13 02:36:03,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:36:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 1402 states, 1037 states have (on average 1.4021215043394406) internal successors, (1454), 1065 states have internal predecessors, (1454), 284 states have call successors, (284), 81 states have call predecessors, (284), 79 states have return successors, (277), 271 states have call predecessors, (277), 277 states have call successors, (277) [2021-11-13 02:36:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-13 02:36:03,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:03,322 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:03,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:03,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1293984460, now seen corresponding path program 1 times [2021-11-13 02:36:03,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:03,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412726921] [2021-11-13 02:36:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:03,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:03,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:03,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:03,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:36:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2382 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:36:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3124 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2021-11-13 02:36:06,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3124 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3121 trivial. 0 not checked. [2021-11-13 02:36:07,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:07,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412726921] [2021-11-13 02:36:07,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412726921] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:36:07,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:36:07,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:36:07,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926168700] [2021-11-13 02:36:07,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:07,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:36:07,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:07,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:36:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:36:07,893 INFO L87 Difference]: Start difference. First operand has 1402 states, 1037 states have (on average 1.4021215043394406) internal successors, (1454), 1065 states have internal predecessors, (1454), 284 states have call successors, (284), 81 states have call predecessors, (284), 79 states have return successors, (277), 271 states have call predecessors, (277), 277 states have call successors, (277) Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-13 02:36:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:08,298 INFO L93 Difference]: Finished difference Result 2802 states and 4183 transitions. [2021-11-13 02:36:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:36:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 267 [2021-11-13 02:36:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:08,350 INFO L225 Difference]: With dead ends: 2802 [2021-11-13 02:36:08,351 INFO L226 Difference]: Without dead ends: 1388 [2021-11-13 02:36:08,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:36:08,379 INFO L933 BasicCegarLoop]: 2005 mSDtfsCounter, 2 mSDsluCounter, 4004 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6009 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.16ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.47ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:08,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6009 Invalid, 15 Unknown, 0 Unchecked, 42.16ms Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 66.47ms Time] [2021-11-13 02:36:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-11-13 02:36:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1388. [2021-11-13 02:36:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1032 states have (on average 1.3943798449612403) internal successors, (1439), 1051 states have internal predecessors, (1439), 277 states have call successors, (277), 79 states have call predecessors, (277), 78 states have return successors, (272), 266 states have call predecessors, (272), 272 states have call successors, (272) [2021-11-13 02:36:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1988 transitions. [2021-11-13 02:36:08,607 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1988 transitions. Word has length 267 [2021-11-13 02:36:08,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:08,614 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 1988 transitions. [2021-11-13 02:36:08,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-13 02:36:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1988 transitions. [2021-11-13 02:36:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-13 02:36:08,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:08,632 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:08,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:08,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:08,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:08,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1994808812, now seen corresponding path program 1 times [2021-11-13 02:36:08,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:08,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813049426] [2021-11-13 02:36:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:08,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:08,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:08,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:08,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:36:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 2392 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:36:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3121 trivial. 0 not checked. [2021-11-13 02:36:11,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3122 trivial. 0 not checked. [2021-11-13 02:36:12,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:12,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813049426] [2021-11-13 02:36:12,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813049426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:36:12,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1561622328] [2021-11-13 02:36:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:12,902 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:36:12,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:36:12,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:36:12,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-13 02:36:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:36:14,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3129 trivial. 0 not checked. [2021-11-13 02:36:15,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3129 trivial. 0 not checked. [2021-11-13 02:36:16,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1561622328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:16,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:36:16,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-13 02:36:16,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421366872] [2021-11-13 02:36:16,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:16,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:36:16,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:16,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:36:16,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:36:16,103 INFO L87 Difference]: Start difference. First operand 1388 states and 1988 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-13 02:36:18,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:21,996 INFO L93 Difference]: Finished difference Result 5206 states and 7453 transitions. [2021-11-13 02:36:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:36:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 269 [2021-11-13 02:36:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:22,042 INFO L225 Difference]: With dead ends: 5206 [2021-11-13 02:36:22,043 INFO L226 Difference]: Without dead ends: 3905 [2021-11-13 02:36:22,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 1064 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:36:22,055 INFO L933 BasicCegarLoop]: 2433 mSDtfsCounter, 3603 mSDsluCounter, 5221 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5170.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3603 SdHoareTripleChecker+Valid, 7654 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.15ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5552.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:22,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3603 Valid, 7654 Invalid, 477 Unknown, 0 Unchecked, 43.15ms Time], IncrementalHoareTripleChecker [7 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 5552.61ms Time] [2021-11-13 02:36:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-11-13 02:36:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3905. [2021-11-13 02:36:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 2953 states have (on average 1.40772096173383) internal successors, (4157), 3002 states have internal predecessors, (4157), 719 states have call successors, (719), 233 states have call predecessors, (719), 232 states have return successors, (714), 696 states have call predecessors, (714), 714 states have call successors, (714) [2021-11-13 02:36:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 5590 transitions. [2021-11-13 02:36:22,287 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 5590 transitions. Word has length 269 [2021-11-13 02:36:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:22,290 INFO L470 AbstractCegarLoop]: Abstraction has 3905 states and 5590 transitions. [2021-11-13 02:36:22,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-13 02:36:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 5590 transitions. [2021-11-13 02:36:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-13 02:36:22,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:22,300 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:22,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:22,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:22,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:22,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash 745013230, now seen corresponding path program 1 times [2021-11-13 02:36:22,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:22,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822656222] [2021-11-13 02:36:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:22,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:22,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:22,722 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:22,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:36:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:24,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 2397 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:36:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3121 trivial. 0 not checked. [2021-11-13 02:36:25,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3122 trivial. 0 not checked. [2021-11-13 02:36:26,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:26,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822656222] [2021-11-13 02:36:26,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822656222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:36:26,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501171525] [2021-11-13 02:36:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:26,281 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:36:26,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:36:26,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:36:26,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-13 02:36:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 2397 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:36:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3129 trivial. 0 not checked. [2021-11-13 02:36:28,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3129 trivial. 0 not checked. [2021-11-13 02:36:28,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501171525] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:28,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:36:28,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-13 02:36:28,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351262614] [2021-11-13 02:36:28,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:28,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:36:28,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:36:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:36:28,958 INFO L87 Difference]: Start difference. First operand 3905 states and 5590 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-13 02:36:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:30,251 INFO L93 Difference]: Finished difference Result 7722 states and 11049 transitions. [2021-11-13 02:36:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:36:30,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 272 [2021-11-13 02:36:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:30,295 INFO L225 Difference]: With dead ends: 7722 [2021-11-13 02:36:30,296 INFO L226 Difference]: Without dead ends: 3904 [2021-11-13 02:36:30,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1077 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:36:30,319 INFO L933 BasicCegarLoop]: 2408 mSDtfsCounter, 2430 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 816.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2430 SdHoareTripleChecker+Valid, 4417 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.19ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 887.46ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:30,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2430 Valid, 4417 Invalid, 157 Unknown, 0 Unchecked, 16.19ms Time], IncrementalHoareTripleChecker [85 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 887.46ms Time] [2021-11-13 02:36:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2021-11-13 02:36:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3904. [2021-11-13 02:36:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 2952 states have (on average 1.4068428184281843) internal successors, (4153), 3001 states have internal predecessors, (4153), 719 states have call successors, (719), 233 states have call predecessors, (719), 232 states have return successors, (714), 696 states have call predecessors, (714), 714 states have call successors, (714) [2021-11-13 02:36:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 5586 transitions. [2021-11-13 02:36:30,565 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 5586 transitions. Word has length 272 [2021-11-13 02:36:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:30,566 INFO L470 AbstractCegarLoop]: Abstraction has 3904 states and 5586 transitions. [2021-11-13 02:36:30,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-13 02:36:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 5586 transitions. [2021-11-13 02:36:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-13 02:36:30,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:30,584 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:30,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:30,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:31,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:31,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash -58486659, now seen corresponding path program 1 times [2021-11-13 02:36:31,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:31,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757667444] [2021-11-13 02:36:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:31,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:31,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:31,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:36:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:36:33,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3239 trivial. 0 not checked. [2021-11-13 02:36:33,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2021-11-13 02:36:35,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:35,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757667444] [2021-11-13 02:36:35,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757667444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:36:35,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [837767341] [2021-11-13 02:36:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:35,002 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:36:35,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:36:35,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:36:35,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 02:36:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:36,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:36:36,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:36:42,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:36:44,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [837767341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:44,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:36:44,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 10 [2021-11-13 02:36:44,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484804617] [2021-11-13 02:36:44,377 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:44,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:36:44,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:36:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:36:44,380 INFO L87 Difference]: Start difference. First operand 3904 states and 5586 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2021-11-13 02:36:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:45,063 INFO L93 Difference]: Finished difference Result 11539 states and 17127 transitions. [2021-11-13 02:36:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:36:45,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) Word has length 331 [2021-11-13 02:36:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:45,151 INFO L225 Difference]: With dead ends: 11539 [2021-11-13 02:36:45,151 INFO L226 Difference]: Without dead ends: 7722 [2021-11-13 02:36:45,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1320 GetRequests, 1312 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:36:45,184 INFO L933 BasicCegarLoop]: 2292 mSDtfsCounter, 1877 mSDsluCounter, 3776 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1877 SdHoareTripleChecker+Valid, 6068 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.28ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 306.47ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:45,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1877 Valid, 6068 Invalid, 81 Unknown, 0 Unchecked, 17.28ms Time], IncrementalHoareTripleChecker [53 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 306.47ms Time] [2021-11-13 02:36:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7722 states. [2021-11-13 02:36:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7722 to 7710. [2021-11-13 02:36:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7710 states, 5854 states have (on average 1.4091219678852067) internal successors, (8249), 5948 states have internal predecessors, (8249), 1391 states have call successors, (1391), 465 states have call predecessors, (1391), 464 states have return successors, (1698), 1350 states have call predecessors, (1698), 1386 states have call successors, (1698) [2021-11-13 02:36:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7710 states to 7710 states and 11338 transitions. [2021-11-13 02:36:45,735 INFO L78 Accepts]: Start accepts. Automaton has 7710 states and 11338 transitions. Word has length 331 [2021-11-13 02:36:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:45,736 INFO L470 AbstractCegarLoop]: Abstraction has 7710 states and 11338 transitions. [2021-11-13 02:36:45,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2021-11-13 02:36:45,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7710 states and 11338 transitions. [2021-11-13 02:36:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-13 02:36:45,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:45,753 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:45,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:46,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:46,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:36:46,179 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:46,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:46,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1813794941, now seen corresponding path program 1 times [2021-11-13 02:36:46,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:46,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827733379] [2021-11-13 02:36:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:46,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:46,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:46,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:46,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:36:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2569 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:36:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3239 trivial. 0 not checked. [2021-11-13 02:36:49,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2021-11-13 02:36:50,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:50,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827733379] [2021-11-13 02:36:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827733379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:36:50,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1944377916] [2021-11-13 02:36:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:50,366 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:36:50,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:36:50,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:36:50,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 02:36:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 2569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:36:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:36:57,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:36:58,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1944377916] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:58,871 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:36:58,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 10 [2021-11-13 02:36:58,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674150290] [2021-11-13 02:36:58,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:58,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:36:58,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:36:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:36:58,875 INFO L87 Difference]: Start difference. First operand 7710 states and 11338 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2021-11-13 02:36:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:59,247 INFO L93 Difference]: Finished difference Result 7712 states and 11339 transitions. [2021-11-13 02:36:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:36:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) Word has length 332 [2021-11-13 02:36:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:59,345 INFO L225 Difference]: With dead ends: 7712 [2021-11-13 02:36:59,346 INFO L226 Difference]: Without dead ends: 7709 [2021-11-13 02:36:59,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1324 GetRequests, 1316 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:36:59,354 INFO L933 BasicCegarLoop]: 1982 mSDtfsCounter, 1811 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1811 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.23ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.56ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:59,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1811 Valid, 1982 Invalid, 51 Unknown, 0 Unchecked, 7.23ms Time], IncrementalHoareTripleChecker [50 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 70.56ms Time] [2021-11-13 02:36:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7709 states. [2021-11-13 02:36:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7709 to 7709. [2021-11-13 02:36:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7709 states, 5854 states have (on average 1.4089511445165699) internal successors, (8248), 5947 states have internal predecessors, (8248), 1390 states have call successors, (1390), 465 states have call predecessors, (1390), 464 states have return successors, (1698), 1350 states have call predecessors, (1698), 1386 states have call successors, (1698) [2021-11-13 02:36:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7709 states to 7709 states and 11336 transitions. [2021-11-13 02:36:59,976 INFO L78 Accepts]: Start accepts. Automaton has 7709 states and 11336 transitions. Word has length 332 [2021-11-13 02:36:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:59,977 INFO L470 AbstractCegarLoop]: Abstraction has 7709 states and 11336 transitions. [2021-11-13 02:36:59,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2021-11-13 02:36:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7709 states and 11336 transitions. [2021-11-13 02:36:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-13 02:36:59,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:59,993 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:00,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:00,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-13 02:37:00,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:00,408 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:00,409 INFO L85 PathProgramCache]: Analyzing trace with hash -393771968, now seen corresponding path program 1 times [2021-11-13 02:37:00,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:00,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119751521] [2021-11-13 02:37:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:00,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:00,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:00,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:00,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:37:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:02,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:37:02,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3239 trivial. 0 not checked. [2021-11-13 02:37:03,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2021-11-13 02:37:04,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:04,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119751521] [2021-11-13 02:37:04,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119751521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:04,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914169386] [2021-11-13 02:37:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:04,449 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:37:04,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:37:04,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 02:37:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:37:08,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:37:09,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914169386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:09,887 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:37:09,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:37:09,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334223621] [2021-11-13 02:37:09,889 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:09,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:09,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:09,891 INFO L87 Difference]: Start difference. First operand 7709 states and 11336 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2021-11-13 02:37:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:10,203 INFO L93 Difference]: Finished difference Result 7711 states and 11337 transitions. [2021-11-13 02:37:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:10,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 333 [2021-11-13 02:37:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:10,278 INFO L225 Difference]: With dead ends: 7711 [2021-11-13 02:37:10,278 INFO L226 Difference]: Without dead ends: 7708 [2021-11-13 02:37:10,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1328 GetRequests, 1321 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:10,287 INFO L933 BasicCegarLoop]: 1980 mSDtfsCounter, 1801 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:10,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 1980 Invalid, 1 Unknown, 0 Unchecked, 5.55ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 3.66ms Time] [2021-11-13 02:37:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7708 states. [2021-11-13 02:37:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7708 to 7708. [2021-11-13 02:37:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 5854 states have (on average 1.408780321147933) internal successors, (8247), 5946 states have internal predecessors, (8247), 1389 states have call successors, (1389), 465 states have call predecessors, (1389), 464 states have return successors, (1698), 1350 states have call predecessors, (1698), 1386 states have call successors, (1698) [2021-11-13 02:37:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 11334 transitions. [2021-11-13 02:37:10,895 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 11334 transitions. Word has length 333 [2021-11-13 02:37:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:10,898 INFO L470 AbstractCegarLoop]: Abstraction has 7708 states and 11334 transitions. [2021-11-13 02:37:10,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2021-11-13 02:37:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 11334 transitions. [2021-11-13 02:37:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-13 02:37:10,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:10,915 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:10,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:11,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-13 02:37:11,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:11,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash 677272102, now seen corresponding path program 1 times [2021-11-13 02:37:11,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:11,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373941334] [2021-11-13 02:37:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:11,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:11,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:11,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:11,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:37:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:13,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:37:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3239 trivial. 0 not checked. [2021-11-13 02:37:14,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2021-11-13 02:37:15,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:15,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373941334] [2021-11-13 02:37:15,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373941334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:15,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1360206510] [2021-11-13 02:37:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:15,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:15,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:37:15,344 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:37:15,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:37:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:37:19,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:37:20,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1360206510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:20,887 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:37:20,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:37:20,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538975151] [2021-11-13 02:37:20,888 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:20,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:20,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:20,891 INFO L87 Difference]: Start difference. First operand 7708 states and 11334 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2021-11-13 02:37:21,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:21,204 INFO L93 Difference]: Finished difference Result 7710 states and 11335 transitions. [2021-11-13 02:37:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:21,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 334 [2021-11-13 02:37:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:21,257 INFO L225 Difference]: With dead ends: 7710 [2021-11-13 02:37:21,257 INFO L226 Difference]: Without dead ends: 7707 [2021-11-13 02:37:21,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1325 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:21,265 INFO L933 BasicCegarLoop]: 1978 mSDtfsCounter, 1798 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.45ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:21,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1798 Valid, 1978 Invalid, 1 Unknown, 0 Unchecked, 5.58ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 3.45ms Time] [2021-11-13 02:37:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2021-11-13 02:37:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 7707. [2021-11-13 02:37:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 5854 states have (on average 1.4086094977792962) internal successors, (8246), 5945 states have internal predecessors, (8246), 1388 states have call successors, (1388), 465 states have call predecessors, (1388), 464 states have return successors, (1698), 1350 states have call predecessors, (1698), 1386 states have call successors, (1698) [2021-11-13 02:37:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 11332 transitions. [2021-11-13 02:37:21,940 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 11332 transitions. Word has length 334 [2021-11-13 02:37:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:21,941 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 11332 transitions. [2021-11-13 02:37:21,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2021-11-13 02:37:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 11332 transitions. [2021-11-13 02:37:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-11-13 02:37:21,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:21,956 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:21,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-13 02:37:22,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:22,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:22,372 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash -480095229, now seen corresponding path program 1 times [2021-11-13 02:37:22,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:22,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325294346] [2021-11-13 02:37:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:22,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:22,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:22,379 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:22,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:37:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:37:24,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3239 trivial. 0 not checked. [2021-11-13 02:37:25,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2021-11-13 02:37:26,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:26,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325294346] [2021-11-13 02:37:26,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325294346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:26,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1671342244] [2021-11-13 02:37:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:26,357 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:26,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:37:26,369 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:37:26,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 02:37:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:28,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:28,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:37:30,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2021-11-13 02:37:31,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1671342244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:31,968 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:37:31,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:37:31,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931828760] [2021-11-13 02:37:31,969 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:31,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:31,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:31,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:31,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:31,972 INFO L87 Difference]: Start difference. First operand 7707 states and 11332 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2021-11-13 02:37:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:32,304 INFO L93 Difference]: Finished difference Result 7709 states and 11333 transitions. [2021-11-13 02:37:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 335 [2021-11-13 02:37:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:32,352 INFO L225 Difference]: With dead ends: 7709 [2021-11-13 02:37:32,352 INFO L226 Difference]: Without dead ends: 7699 [2021-11-13 02:37:32,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1336 GetRequests, 1329 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:32,360 INFO L933 BasicCegarLoop]: 1977 mSDtfsCounter, 1795 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:32,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1795 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 5.24ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:37:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7699 states. [2021-11-13 02:37:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7699 to 7699. [2021-11-13 02:37:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 5847 states have (on average 1.4087566273302548) internal successors, (8237), 5937 states have internal predecessors, (8237), 1387 states have call successors, (1387), 465 states have call predecessors, (1387), 464 states have return successors, (1698), 1350 states have call predecessors, (1698), 1386 states have call successors, (1698) [2021-11-13 02:37:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 11322 transitions. [2021-11-13 02:37:33,012 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 11322 transitions. Word has length 335 [2021-11-13 02:37:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:33,014 INFO L470 AbstractCegarLoop]: Abstraction has 7699 states and 11322 transitions. [2021-11-13 02:37:33,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2021-11-13 02:37:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 11322 transitions. [2021-11-13 02:37:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-13 02:37:33,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:33,072 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:33,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:33,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:33,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:33,489 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1509203176, now seen corresponding path program 1 times [2021-11-13 02:37:33,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:33,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251802247] [2021-11-13 02:37:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:33,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:33,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:33,496 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:33,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:37:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:36,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 3030 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:37:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3271 trivial. 0 not checked. [2021-11-13 02:37:37,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4552 trivial. 0 not checked. [2021-11-13 02:37:38,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:38,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251802247] [2021-11-13 02:37:38,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251802247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:38,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [103358776] [2021-11-13 02:37:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:38,707 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:38,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:37:38,708 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:37:38,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-13 02:37:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 3030 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:40,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 1288 proven. 0 refuted. 0 times theorem prover too weak. 3271 trivial. 0 not checked. [2021-11-13 02:37:42,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4551 trivial. 0 not checked. [2021-11-13 02:37:43,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [103358776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:43,246 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:37:43,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:37:43,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133640045] [2021-11-13 02:37:43,247 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:43,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:43,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:43,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:43,250 INFO L87 Difference]: Start difference. First operand 7699 states and 11322 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2021-11-13 02:37:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:44,660 INFO L93 Difference]: Finished difference Result 18854 states and 27609 transitions. [2021-11-13 02:37:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) Word has length 479 [2021-11-13 02:37:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:44,744 INFO L225 Difference]: With dead ends: 18854 [2021-11-13 02:37:44,744 INFO L226 Difference]: Without dead ends: 11242 [2021-11-13 02:37:44,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1912 GetRequests, 1905 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:44,801 INFO L933 BasicCegarLoop]: 2159 mSDtfsCounter, 1550 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 784.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.70ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 867.33ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:44,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 3925 Invalid, 80 Unknown, 0 Unchecked, 9.70ms Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 867.33ms Time] [2021-11-13 02:37:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11242 states. [2021-11-13 02:37:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 11232. [2021-11-13 02:37:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 8504 states have (on average 1.4009877704609595) internal successors, (11914), 8654 states have internal predecessors, (11914), 1996 states have call successors, (1996), 732 states have call predecessors, (1996), 731 states have return successors, (2491), 1935 states have call predecessors, (2491), 1995 states have call successors, (2491) [2021-11-13 02:37:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 16401 transitions. [2021-11-13 02:37:45,792 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 16401 transitions. Word has length 479 [2021-11-13 02:37:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:45,793 INFO L470 AbstractCegarLoop]: Abstraction has 11232 states and 16401 transitions. [2021-11-13 02:37:45,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2021-11-13 02:37:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 16401 transitions. [2021-11-13 02:37:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-11-13 02:37:45,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:45,862 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:45,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:46,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:46,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:46,279 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:46,279 INFO L85 PathProgramCache]: Analyzing trace with hash -917127576, now seen corresponding path program 1 times [2021-11-13 02:37:46,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:46,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876091915] [2021-11-13 02:37:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:46,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:46,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:46,286 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:46,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:37:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 3132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:37:48,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4580 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3292 trivial. 0 not checked. [2021-11-13 02:37:50,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4580 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4573 trivial. 0 not checked. [2021-11-13 02:37:52,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:52,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876091915] [2021-11-13 02:37:52,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876091915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:52,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1407512737] [2021-11-13 02:37:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:52,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:37:52,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:37:52,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 02:37:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:53,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 3132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4580 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 4546 trivial. 0 not checked. [2021-11-13 02:37:55,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4580 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4570 trivial. 0 not checked. [2021-11-13 02:37:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1407512737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:56,435 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:37:56,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:37:56,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859498640] [2021-11-13 02:37:56,437 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:56,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:56,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:56,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:56,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:56,439 INFO L87 Difference]: Start difference. First operand 11232 states and 16401 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2021-11-13 02:37:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:57,092 INFO L93 Difference]: Finished difference Result 22380 states and 33577 transitions. [2021-11-13 02:37:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:57,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) Word has length 510 [2021-11-13 02:37:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:57,172 INFO L225 Difference]: With dead ends: 22380 [2021-11-13 02:37:57,172 INFO L226 Difference]: Without dead ends: 11242 [2021-11-13 02:37:57,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2036 GetRequests, 2029 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:57,237 INFO L933 BasicCegarLoop]: 1972 mSDtfsCounter, 0 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3940 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:57,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3940 Invalid, 5 Unknown, 0 Unchecked, 6.67ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 34.69ms Time] [2021-11-13 02:37:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11242 states. [2021-11-13 02:37:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 11242. [2021-11-13 02:37:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11242 states, 8514 states have (on average 1.400516795865633) internal successors, (11924), 8664 states have internal predecessors, (11924), 1996 states have call successors, (1996), 732 states have call predecessors, (1996), 731 states have return successors, (2491), 1935 states have call predecessors, (2491), 1995 states have call successors, (2491) [2021-11-13 02:37:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11242 states to 11242 states and 16411 transitions. [2021-11-13 02:37:58,040 INFO L78 Accepts]: Start accepts. Automaton has 11242 states and 16411 transitions. Word has length 510 [2021-11-13 02:37:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:58,042 INFO L470 AbstractCegarLoop]: Abstraction has 11242 states and 16411 transitions. [2021-11-13 02:37:58,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2021-11-13 02:37:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 11242 states and 16411 transitions. [2021-11-13 02:37:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-13 02:37:58,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:58,100 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:58,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:58,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:58,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:58,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1585961048, now seen corresponding path program 2 times [2021-11-13 02:37:58,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:58,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176026304] [2021-11-13 02:37:58,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:37:58,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:58,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:58,534 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:58,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:39:42,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:39:42,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:39:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 3030 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:43,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3271 trivial. 0 not checked. [2021-11-13 02:39:44,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4552 trivial. 0 not checked. [2021-11-13 02:39:46,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:46,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176026304] [2021-11-13 02:39:46,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176026304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:46,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2146269966] [2021-11-13 02:39:46,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:39:46,140 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:46,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:46,142 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:46,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-13 02:46:50,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:46:50,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:46:52,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 3030 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:46:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4533 trivial. 0 not checked. [2021-11-13 02:46:53,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4549 trivial. 0 not checked. [2021-11-13 02:46:54,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2146269966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:46:54,539 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:46:54,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-13 02:46:54,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23537343] [2021-11-13 02:46:54,540 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:46:54,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:46:54,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:46:54,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:46:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:46:54,542 INFO L87 Difference]: Start difference. First operand 11242 states and 16411 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-13 02:46:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:46:55,319 INFO L93 Difference]: Finished difference Result 22430 states and 32863 transitions. [2021-11-13 02:46:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:46:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 479 [2021-11-13 02:46:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:46:55,396 INFO L225 Difference]: With dead ends: 22430 [2021-11-13 02:46:55,396 INFO L226 Difference]: Without dead ends: 11282 [2021-11-13 02:46:55,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1913 GetRequests, 1904 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:46:55,446 INFO L933 BasicCegarLoop]: 1970 mSDtfsCounter, 3 mSDsluCounter, 3935 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5905 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.22ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:46:55,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5905 Invalid, 15 Unknown, 0 Unchecked, 6.22ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 51.02ms Time] [2021-11-13 02:46:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11282 states. [2021-11-13 02:46:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11282 to 11272. [2021-11-13 02:46:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 8544 states have (on average 1.3991104868913857) internal successors, (11954), 8694 states have internal predecessors, (11954), 1996 states have call successors, (1996), 732 states have call predecessors, (1996), 731 states have return successors, (2491), 1935 states have call predecessors, (2491), 1995 states have call successors, (2491) [2021-11-13 02:46:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 16441 transitions. [2021-11-13 02:46:56,262 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 16441 transitions. Word has length 479 [2021-11-13 02:46:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:46:56,264 INFO L470 AbstractCegarLoop]: Abstraction has 11272 states and 16441 transitions. [2021-11-13 02:46:56,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-13 02:46:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 16441 transitions. [2021-11-13 02:46:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-11-13 02:46:56,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:46:56,391 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:46:56,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:46:56,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:46:56,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:46:56,806 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:46:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:46:56,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1501899226, now seen corresponding path program 1 times [2021-11-13 02:46:56,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:46:56,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004534971] [2021-11-13 02:46:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:56,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:46:56,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:46:56,812 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:46:56,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:46:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 3134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:46:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4580 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3292 trivial. 0 not checked. [2021-11-13 02:47:00,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4580 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4573 trivial. 0 not checked. [2021-11-13 02:47:02,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:47:02,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004534971] [2021-11-13 02:47:02,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004534971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:47:02,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1582862241] [2021-11-13 02:47:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:02,248 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:47:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:47:02,249 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:47:02,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-13 02:47:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 3134 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:47:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4580 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 4541 trivial. 0 not checked. [2021-11-13 02:47:05,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4580 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4570 trivial. 0 not checked. [2021-11-13 02:47:07,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1582862241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:47:07,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:47:07,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-13 02:47:07,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045991213] [2021-11-13 02:47:07,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:47:07,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:47:07,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:47:07,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:47:07,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:47:07,274 INFO L87 Difference]: Start difference. First operand 11272 states and 16441 transitions. Second operand has 8 states, 8 states have (on average 31.75) internal successors, (254), 6 states have internal predecessors, (254), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (81), 4 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-13 02:47:09,336 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:47:09,999 INFO L93 Difference]: Finished difference Result 22530 states and 33807 transitions. [2021-11-13 02:47:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:47:10,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.75) internal successors, (254), 6 states have internal predecessors, (254), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (81), 4 states have call predecessors, (81), 2 states have call successors, (81) Word has length 510 [2021-11-13 02:47:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:47:10,066 INFO L225 Difference]: With dead ends: 22530 [2021-11-13 02:47:10,067 INFO L226 Difference]: Without dead ends: 11352 [2021-11-13 02:47:10,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2036 GetRequests, 2024 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:47:10,120 INFO L933 BasicCegarLoop]: 1973 mSDtfsCounter, 3 mSDsluCounter, 9860 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2135.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11833 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.37ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2159.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:47:10,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 11833 Invalid, 16 Unknown, 0 Unchecked, 13.37ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 2159.79ms Time] [2021-11-13 02:47:10,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11352 states. [2021-11-13 02:47:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11352 to 11312. [2021-11-13 02:47:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11312 states, 8574 states have (on average 1.397714019127595) internal successors, (11984), 8724 states have internal predecessors, (11984), 1996 states have call successors, (1996), 732 states have call predecessors, (1996), 741 states have return successors, (2521), 1945 states have call predecessors, (2521), 1995 states have call successors, (2521) [2021-11-13 02:47:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11312 states to 11312 states and 16501 transitions. [2021-11-13 02:47:11,073 INFO L78 Accepts]: Start accepts. Automaton has 11312 states and 16501 transitions. Word has length 510 [2021-11-13 02:47:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:47:11,074 INFO L470 AbstractCegarLoop]: Abstraction has 11312 states and 16501 transitions. [2021-11-13 02:47:11,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.75) internal successors, (254), 6 states have internal predecessors, (254), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (81), 4 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-13 02:47:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 11312 states and 16501 transitions. [2021-11-13 02:47:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-13 02:47:11,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:47:11,116 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:47:11,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:11,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:11,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:47:11,538 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:47:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:47:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1918604186, now seen corresponding path program 1 times [2021-11-13 02:47:11,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:47:11,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862797244] [2021-11-13 02:47:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:11,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:47:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:47:11,545 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:47:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:47:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 3027 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:47:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3271 trivial. 0 not checked. [2021-11-13 02:47:15,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4552 trivial. 0 not checked. [2021-11-13 02:47:16,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:47:16,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862797244] [2021-11-13 02:47:16,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862797244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:47:16,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659358009] [2021-11-13 02:47:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:16,659 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:47:16,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:47:16,660 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:47:16,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-13 02:47:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 3027 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:47:18,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2021-11-13 02:47:20,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2021-11-13 02:47:22,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659358009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:47:22,539 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:47:22,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-13 02:47:22,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470316950] [2021-11-13 02:47:22,540 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:47:22,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:47:22,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:47:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:47:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:47:22,544 INFO L87 Difference]: Start difference. First operand 11312 states and 16501 transitions. Second operand has 9 states, 9 states have (on average 26.333333333333332) internal successors, (237), 7 states have internal predecessors, (237), 5 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (112), 7 states have call predecessors, (112), 5 states have call successors, (112) [2021-11-13 02:47:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:47:23,275 INFO L93 Difference]: Finished difference Result 22660 states and 34017 transitions. [2021-11-13 02:47:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:47:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 26.333333333333332) internal successors, (237), 7 states have internal predecessors, (237), 5 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (112), 7 states have call predecessors, (112), 5 states have call successors, (112) Word has length 479 [2021-11-13 02:47:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:47:23,349 INFO L225 Difference]: With dead ends: 22660 [2021-11-13 02:47:23,349 INFO L226 Difference]: Without dead ends: 11442 [2021-11-13 02:47:23,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1912 GetRequests, 1899 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:47:23,407 INFO L933 BasicCegarLoop]: 1972 mSDtfsCounter, 405 mSDsluCounter, 9310 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 11282 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:47:23,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 11282 Invalid, 21 Unknown, 0 Unchecked, 20.10ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 109.72ms Time] [2021-11-13 02:47:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11442 states. [2021-11-13 02:47:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11442 to 11397. [2021-11-13 02:47:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11397 states, 8634 states have (on average 1.3961084086170952) internal successors, (12054), 8789 states have internal predecessors, (12054), 2006 states have call successors, (2006), 732 states have call predecessors, (2006), 756 states have return successors, (2611), 1965 states have call predecessors, (2611), 2005 states have call successors, (2611) [2021-11-13 02:47:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11397 states to 11397 states and 16671 transitions. [2021-11-13 02:47:24,327 INFO L78 Accepts]: Start accepts. Automaton has 11397 states and 16671 transitions. Word has length 479 [2021-11-13 02:47:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:47:24,328 INFO L470 AbstractCegarLoop]: Abstraction has 11397 states and 16671 transitions. [2021-11-13 02:47:24,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.333333333333332) internal successors, (237), 7 states have internal predecessors, (237), 5 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (112), 7 states have call predecessors, (112), 5 states have call successors, (112) [2021-11-13 02:47:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11397 states and 16671 transitions. [2021-11-13 02:47:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-11-13 02:47:24,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:47:24,369 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:47:24,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:24,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:24,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:47:24,783 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:47:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:47:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash -186665452, now seen corresponding path program 1 times [2021-11-13 02:47:24,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:47:24,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489460561] [2021-11-13 02:47:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:24,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:47:24,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:47:24,789 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:47:24,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 02:47:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:27,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 3042 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:47:27,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3271 trivial. 0 not checked. [2021-11-13 02:47:28,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4552 trivial. 0 not checked. [2021-11-13 02:47:30,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:47:30,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489460561] [2021-11-13 02:47:30,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489460561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:47:30,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [265849779] [2021-11-13 02:47:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:30,197 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:47:30,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:47:30,198 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:47:30,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-13 02:47:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 3042 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:47:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4533 trivial. 0 not checked. [2021-11-13 02:47:33,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4549 trivial. 0 not checked. [2021-11-13 02:47:34,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [265849779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:47:34,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:47:34,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-13 02:47:34,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063294472] [2021-11-13 02:47:34,189 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:47:34,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:47:34,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:47:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:47:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:47:34,191 INFO L87 Difference]: Start difference. First operand 11397 states and 16671 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-13 02:47:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:47:34,832 INFO L93 Difference]: Finished difference Result 22840 states and 34402 transitions. [2021-11-13 02:47:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:47:34,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 485 [2021-11-13 02:47:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:47:34,890 INFO L225 Difference]: With dead ends: 22840 [2021-11-13 02:47:34,890 INFO L226 Difference]: Without dead ends: 11537 [2021-11-13 02:47:34,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1936 GetRequests, 1928 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:47:34,924 INFO L933 BasicCegarLoop]: 1972 mSDtfsCounter, 14 mSDsluCounter, 3923 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 5895 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:47:34,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 5895 Invalid, 18 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 78.92ms Time] [2021-11-13 02:47:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-11-13 02:47:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 11507. [2021-11-13 02:47:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11507 states, 8709 states have (on average 1.393845447238489) internal successors, (12139), 8869 states have internal predecessors, (12139), 2036 states have call successors, (2036), 732 states have call predecessors, (2036), 761 states have return successors, (2661), 1995 states have call predecessors, (2661), 2035 states have call successors, (2661) [2021-11-13 02:47:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11507 states to 11507 states and 16836 transitions. [2021-11-13 02:47:35,563 INFO L78 Accepts]: Start accepts. Automaton has 11507 states and 16836 transitions. Word has length 485 [2021-11-13 02:47:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:47:35,564 INFO L470 AbstractCegarLoop]: Abstraction has 11507 states and 16836 transitions. [2021-11-13 02:47:35,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-13 02:47:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 11507 states and 16836 transitions. [2021-11-13 02:47:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-13 02:47:35,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:47:35,601 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:47:35,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:35,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:36,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:47:36,019 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:47:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:47:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1584105229, now seen corresponding path program 1 times [2021-11-13 02:47:36,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:47:36,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183418815] [2021-11-13 02:47:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:36,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:47:36,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:47:36,025 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:47:36,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 02:47:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:47:38,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3271 trivial. 0 not checked. [2021-11-13 02:47:39,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4552 trivial. 0 not checked. [2021-11-13 02:47:41,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:47:41,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183418815] [2021-11-13 02:47:41,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183418815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:47:41,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1230614368] [2021-11-13 02:47:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:41,075 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:47:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:47:41,076 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:47:41,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-13 02:47:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:47:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3271 trivial. 0 not checked. [2021-11-13 02:47:48,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4552 trivial. 0 not checked. [2021-11-13 02:47:49,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1230614368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:47:49,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890340246] [2021-11-13 02:47:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:49,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:47:49,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:47:49,859 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:47:49,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-13 02:47:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:47:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 4537 trivial. 0 not checked. [2021-11-13 02:47:55,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4549 trivial. 0 not checked. [2021-11-13 02:47:57,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890340246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:47:57,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 02:47:57,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [5, 5, 5, 5] total 11 [2021-11-13 02:47:57,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934978783] [2021-11-13 02:47:57,736 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:47:57,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:47:57,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:47:57,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:47:57,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:47:57,738 INFO L87 Difference]: Start difference. First operand 11507 states and 16836 transitions. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 5 states have call successors, (139), 3 states have call predecessors, (139), 4 states have return successors, (138), 5 states have call predecessors, (138), 5 states have call successors, (138) [2021-11-13 02:48:00,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:48:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:48:03,659 INFO L93 Difference]: Finished difference Result 22880 states and 34545 transitions. [2021-11-13 02:48:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:48:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 5 states have call successors, (139), 3 states have call predecessors, (139), 4 states have return successors, (138), 5 states have call predecessors, (138), 5 states have call successors, (138) Word has length 487 [2021-11-13 02:48:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:48:03,714 INFO L225 Difference]: With dead ends: 22880 [2021-11-13 02:48:03,714 INFO L226 Difference]: Without dead ends: 11467 [2021-11-13 02:48:03,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2916 GetRequests, 2907 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:48:03,759 INFO L933 BasicCegarLoop]: 1889 mSDtfsCounter, 2981 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 527 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4982.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 3236 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.47ms SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5376.60ms IncrementalHoareTripleChecker+Time [2021-11-13 02:48:03,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2981 Valid, 3236 Invalid, 1151 Unknown, 0 Unchecked, 14.47ms Time], IncrementalHoareTripleChecker [527 Valid, 623 Invalid, 1 Unknown, 0 Unchecked, 5376.60ms Time] [2021-11-13 02:48:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-11-13 02:48:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 11467. [2021-11-13 02:48:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11467 states, 8689 states have (on average 1.3521694095983428) internal successors, (11749), 8849 states have internal predecessors, (11749), 2016 states have call successors, (2016), 732 states have call predecessors, (2016), 761 states have return successors, (2641), 1975 states have call predecessors, (2641), 2015 states have call successors, (2641) [2021-11-13 02:48:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11467 states to 11467 states and 16406 transitions. [2021-11-13 02:48:04,625 INFO L78 Accepts]: Start accepts. Automaton has 11467 states and 16406 transitions. Word has length 487 [2021-11-13 02:48:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:48:04,627 INFO L470 AbstractCegarLoop]: Abstraction has 11467 states and 16406 transitions. [2021-11-13 02:48:04,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 5 states have call successors, (139), 3 states have call predecessors, (139), 4 states have return successors, (138), 5 states have call predecessors, (138), 5 states have call successors, (138) [2021-11-13 02:48:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 11467 states and 16406 transitions. [2021-11-13 02:48:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-13 02:48:04,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:48:04,664 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:48:04,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-13 02:48:04,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-13 02:48:05,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 02:48:05,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:48:05,290 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:48:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:48:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash 400349043, now seen corresponding path program 1 times [2021-11-13 02:48:05,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:48:05,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814709553] [2021-11-13 02:48:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:48:05,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:48:05,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:48:05,295 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:48:05,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 02:48:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:48:07,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:48:07,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:48:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 1287 proven. 1 refuted. 0 times theorem prover too weak. 3271 trivial. 0 not checked. [2021-11-13 02:48:09,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:48:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4559 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4552 trivial. 0 not checked. [2021-11-13 02:48:10,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:48:10,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814709553] [2021-11-13 02:48:10,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814709553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:48:10,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1256471747] [2021-11-13 02:48:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:48:10,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:48:10,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:48:10,542 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:48:10,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bd3e1e-92df-44dc-9757-af5c75a6040b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process