./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.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_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/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_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/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_8cb928fa-7f46-4a31-9839-1691d8074cd8/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 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:28:30,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:28:30,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:28:30,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:28:30,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:28:30,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:28:30,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:28:30,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:28:30,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:28:30,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:28:30,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:28:30,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:28:30,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:28:30,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:28:30,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:28:30,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:28:30,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:28:30,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:28:30,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:28:30,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:28:30,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:28:30,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:28:30,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:28:30,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:28:30,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:28:30,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:28:30,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:28:30,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:28:30,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:28:30,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:28:30,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:28:30,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:28:30,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:28:30,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:28:30,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:28:30,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:28:30,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:28:30,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:28:30,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:28:30,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:28:30,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:28:30,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:28:30,992 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:28:30,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:28:30,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:28:30,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:28:30,994 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:28:30,994 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:28:30,994 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:28:30,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:28:30,995 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:28:30,995 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:28:30,995 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:28:30,995 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:28:30,996 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:28:30,996 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:28:30,996 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:28:30,996 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:28:30,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:28:30,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:28:30,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:28:30,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:28:30,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:28:30,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:28:30,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:28:30,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:28:30,999 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:28:30,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:28:30,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:28:30,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:28:31,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:31,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:28:31,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:28:31,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:28:31,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:28:31,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:28:31,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:28:31,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:28:31,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:28:31,002 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_8cb928fa-7f46-4a31-9839-1691d8074cd8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 [2021-11-12 22:28:31,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:28:31,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:28:31,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:28:31,352 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:28:31,353 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:28:31,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-12 22:28:31,459 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data/625068686/c3886f32029c4ed7b6df638c7029b28f/FLAG6300fde6a [2021-11-12 22:28:32,320 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:28:32,321 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-12 22:28:32,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data/625068686/c3886f32029c4ed7b6df638c7029b28f/FLAG6300fde6a [2021-11-12 22:28:32,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data/625068686/c3886f32029c4ed7b6df638c7029b28f [2021-11-12 22:28:32,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:28:32,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:28:32,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:32,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:28:32,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:28:32,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:32" (1/1) ... [2021-11-12 22:28:32,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59497412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:32, skipping insertion in model container [2021-11-12 22:28:32,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:32" (1/1) ... [2021-11-12 22:28:32,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:28:32,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:33,729 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_8cb928fa-7f46-4a31-9839-1691d8074cd8/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-12 22:28:34,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:34,103 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) [2021-11-12 22:28:34,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bc697bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:34, skipping insertion in model container [2021-11-12 22:28:34,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:34,105 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:28:34,108 INFO L158 Benchmark]: Toolchain (without parser) took 1300.48ms. Allocated memory is still 125.8MB. Free memory was 77.6MB in the beginning and 58.8MB in the end (delta: 18.8MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. [2021-11-12 22:28:34,108 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 125.8MB. Free memory is still 101.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:28:34,110 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1292.60ms. Allocated memory is still 125.8MB. Free memory was 77.4MB in the beginning and 58.8MB in the end (delta: 18.6MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. [2021-11-12 22:28:34,112 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 125.8MB. Free memory is still 101.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1292.60ms. Allocated memory is still 125.8MB. Free memory was 77.4MB in the beginning and 58.8MB in the end (delta: 18.6MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5302]: 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_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/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_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/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_8cb928fa-7f46-4a31-9839-1691d8074cd8/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 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:28:36,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:28:36,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:28:36,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:28:36,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:28:36,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:28:36,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:28:36,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:28:36,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:28:36,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:28:36,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:28:36,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:28:36,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:28:36,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:28:36,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:28:36,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:28:36,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:28:36,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:28:36,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:28:36,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:28:36,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:28:36,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:28:36,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:28:36,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:28:36,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:28:36,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:28:36,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:28:36,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:28:36,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:28:36,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:28:36,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:28:36,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:28:36,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:28:36,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:28:36,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:28:36,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:28:36,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:28:36,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:28:36,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:28:36,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:28:36,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:28:36,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:28:36,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:28:36,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:28:36,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:28:36,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:28:36,939 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:28:36,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:28:36,939 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:28:36,939 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:28:36,940 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:28:36,940 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:28:36,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:28:36,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:28:36,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:28:36,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:28:36,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:28:36,944 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:28:36,944 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:28:36,945 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:28:36,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:28:36,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:28:36,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:28:36,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:28:36,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:28:36,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:28:36,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:36,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:28:36,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:28:36,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:28:36,947 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:28:36,948 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:36,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:28:36,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:28:36,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:28:36,949 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_8cb928fa-7f46-4a31-9839-1691d8074cd8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 [2021-11-12 22:28:37,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:28:37,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:28:37,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:28:37,388 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:28:37,389 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:28:37,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-12 22:28:37,468 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data/85743b00e/71b0e8bdc53f43e28c72cafe49dcd290/FLAG86a6217d9 [2021-11-12 22:28:38,514 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:28:38,515 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-12 22:28:38,550 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data/85743b00e/71b0e8bdc53f43e28c72cafe49dcd290/FLAG86a6217d9 [2021-11-12 22:28:38,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/data/85743b00e/71b0e8bdc53f43e28c72cafe49dcd290 [2021-11-12 22:28:38,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:28:38,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:28:38,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:38,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:28:38,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:28:38,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:38" (1/1) ... [2021-11-12 22:28:38,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67220d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:38, skipping insertion in model container [2021-11-12 22:28:38,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:38" (1/1) ... [2021-11-12 22:28:38,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:28:39,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:39,958 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_8cb928fa-7f46-4a31-9839-1691d8074cd8/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-12 22:28:40,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:40,297 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:28:40,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:40,501 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_8cb928fa-7f46-4a31-9839-1691d8074cd8/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-12 22:28:40,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:40,639 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:28:40,884 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_8cb928fa-7f46-4a31-9839-1691d8074cd8/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-12 22:28:41,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:41,095 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:28:41,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41 WrapperNode [2021-11-12 22:28:41,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:41,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:28:41,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:28:41,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:28:41,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:28:41,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:28:41,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:28:41,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:28:41,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:28:41,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:28:41,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:28:41,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:28:41,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (1/1) ... [2021-11-12 22:28:41,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:41,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:28:41,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:28:41,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:28:41,679 INFO L130 BoogieDeclarations]: Found specification of procedure load_pkt [2021-11-12 22:28:41,679 INFO L138 BoogieDeclarations]: Found implementation of procedure load_pkt [2021-11-12 22:28:41,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:28:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:28:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:28:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:28:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:28:41,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:28:41,681 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 22:28:41,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 22:28:41,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 22:28:41,681 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 22:28:41,681 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:28:41,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:28:41,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2021-11-12 22:28:41,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2021-11-12 22:28:41,682 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~X~C_INT~X~$Pointer$~X~C_INT~TO~VOID [2021-11-12 22:28:41,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~X~C_INT~X~$Pointer$~X~C_INT~TO~VOID [2021-11-12 22:28:41,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-12 22:28:41,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-12 22:28:41,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 22:28:41,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 22:28:41,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:28:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:28:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:28:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:28:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:28:41,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:28:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:28:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-11-12 22:28:41,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-11-12 22:28:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:28:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:28:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:28:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:28:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:28:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:28:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-12 22:28:41,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-12 22:28:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:28:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:28:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:28:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:28:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:28:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:28:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:28:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:28:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure type_trans [2021-11-12 22:28:41,688 INFO L138 BoogieDeclarations]: Found implementation of procedure type_trans [2021-11-12 22:28:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-12 22:28:41,689 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-12 22:28:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 22:28:41,689 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 22:28:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:28:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-12 22:28:41,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-12 22:28:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-12 22:28:41,690 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-12 22:28:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:28:41,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:28:43,403 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 22:29:02,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:29:02,742 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-12 22:29:02,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:02 BoogieIcfgContainer [2021-11-12 22:29:02,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:29:02,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:29:02,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:29:02,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:29:02,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:28:38" (1/3) ... [2021-11-12 22:29:02,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c017f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:02, skipping insertion in model container [2021-11-12 22:29:02,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:41" (2/3) ... [2021-11-12 22:29:02,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c017f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:02, skipping insertion in model container [2021-11-12 22:29:02,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:02" (3/3) ... [2021-11-12 22:29:02,754 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-12 22:29:02,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:29:02,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:29:02,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:29:02,819 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 [2021-11-12 22:29:02,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:29:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 243 states have (on average 1.4444444444444444) internal successors, (351), 248 states have internal predecessors, (351), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-12 22:29:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 22:29:02,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:02,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:02,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:02,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:02,857 INFO L85 PathProgramCache]: Analyzing trace with hash 722424883, now seen corresponding path program 1 times [2021-11-12 22:29:02,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:02,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507379655] [2021-11-12 22:29:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:02,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:02,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:02,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:02,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:29:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:03,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:29:03,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:03,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:03,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:03,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507379655] [2021-11-12 22:29:03,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507379655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:03,642 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:03,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:29:03,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061121300] [2021-11-12 22:29:03,658 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:03,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:29:03,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:29:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:03,692 INFO L87 Difference]: Start difference. First operand has 305 states, 243 states have (on average 1.4444444444444444) internal successors, (351), 248 states have internal predecessors, (351), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 22:29:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:03,804 INFO L93 Difference]: Finished difference Result 606 states and 890 transitions. [2021-11-12 22:29:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:29:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-12 22:29:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:03,820 INFO L225 Difference]: With dead ends: 606 [2021-11-12 22:29:03,820 INFO L226 Difference]: Without dead ends: 296 [2021-11-12 22:29:03,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:03,830 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 0 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:03,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 852 Invalid, 3 Unknown, 0 Unchecked, 10.27ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 18.75ms Time] [2021-11-12 22:29:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-12 22:29:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-11-12 22:29:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 239 states have (on average 1.401673640167364) internal successors, (335), 239 states have internal predecessors, (335), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-12 22:29:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 418 transitions. [2021-11-12 22:29:03,918 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 418 transitions. Word has length 25 [2021-11-12 22:29:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:03,923 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 418 transitions. [2021-11-12 22:29:03,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 22:29:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 418 transitions. [2021-11-12 22:29:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:29:03,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:03,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:03,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:04,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:04,143 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1313495606, now seen corresponding path program 1 times [2021-11-12 22:29:04,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:04,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478766107] [2021-11-12 22:29:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:04,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:04,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:04,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:04,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:29:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:04,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:29:04,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:04,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:04,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:04,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478766107] [2021-11-12 22:29:04,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478766107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:04,771 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:04,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:29:04,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820402782] [2021-11-12 22:29:04,772 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:04,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:29:04,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:29:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:04,774 INFO L87 Difference]: Start difference. First operand 296 states and 418 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 22:29:06,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:07,639 INFO L93 Difference]: Finished difference Result 1122 states and 1597 transitions. [2021-11-12 22:29:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:29:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-12 22:29:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:07,649 INFO L225 Difference]: With dead ends: 1122 [2021-11-12 22:29:07,649 INFO L226 Difference]: Without dead ends: 835 [2021-11-12 22:29:07,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:07,652 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 1065 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 82 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2640.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.66ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2771.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:07,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 1217 Invalid, 179 Unknown, 0 Unchecked, 12.66ms Time], IncrementalHoareTripleChecker [82 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 2771.35ms Time] [2021-11-12 22:29:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-12 22:29:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 835. [2021-11-12 22:29:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 674 states have (on average 1.410979228486647) internal successors, (951), 674 states have internal predecessors, (951), 118 states have call successors, (118), 43 states have call predecessors, (118), 42 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-12 22:29:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1186 transitions. [2021-11-12 22:29:07,767 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1186 transitions. Word has length 26 [2021-11-12 22:29:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:07,767 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1186 transitions. [2021-11-12 22:29:07,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 22:29:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1186 transitions. [2021-11-12 22:29:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-12 22:29:07,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:07,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:07,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:07,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:07,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:07,994 INFO L85 PathProgramCache]: Analyzing trace with hash -266926877, now seen corresponding path program 1 times [2021-11-12 22:29:07,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:07,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765997491] [2021-11-12 22:29:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:07,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:07,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:08,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:29:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:29:08,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:08,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:08,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:08,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765997491] [2021-11-12 22:29:08,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765997491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:08,551 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:08,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:29:08,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817779666] [2021-11-12 22:29:08,551 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:08,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:29:08,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:29:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:08,557 INFO L87 Difference]: Start difference. First operand 835 states and 1186 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 22:29:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:09,015 INFO L93 Difference]: Finished difference Result 1660 states and 2359 transitions. [2021-11-12 22:29:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:29:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-12 22:29:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:09,024 INFO L225 Difference]: With dead ends: 1660 [2021-11-12 22:29:09,024 INFO L226 Difference]: Without dead ends: 834 [2021-11-12 22:29:09,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:29:09,032 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 654 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 322.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.63ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:09,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 1050 Invalid, 71 Unknown, 0 Unchecked, 7.63ms Time], IncrementalHoareTripleChecker [37 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 365.80ms Time] [2021-11-12 22:29:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-12 22:29:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2021-11-12 22:29:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 673 states have (on average 1.4071322436849927) internal successors, (947), 673 states have internal predecessors, (947), 118 states have call successors, (118), 43 states have call predecessors, (118), 42 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-12 22:29:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1182 transitions. [2021-11-12 22:29:09,111 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1182 transitions. Word has length 30 [2021-11-12 22:29:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:09,111 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1182 transitions. [2021-11-12 22:29:09,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 22:29:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1182 transitions. [2021-11-12 22:29:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 22:29:09,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:09,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:09,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:29:09,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:09,345 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2109343556, now seen corresponding path program 1 times [2021-11-12 22:29:09,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:09,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563852793] [2021-11-12 22:29:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:09,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:09,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:09,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:29:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:29:09,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:29:10,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:29:10,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:10,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563852793] [2021-11-12 22:29:10,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563852793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:10,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:10,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:29:10,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733279911] [2021-11-12 22:29:10,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:10,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:10,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:10,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:29:10,320 INFO L87 Difference]: Start difference. First operand 834 states and 1182 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:29:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:10,622 INFO L93 Difference]: Finished difference Result 2481 states and 3549 transitions. [2021-11-12 22:29:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:10,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-11-12 22:29:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:10,637 INFO L225 Difference]: With dead ends: 2481 [2021-11-12 22:29:10,638 INFO L226 Difference]: Without dead ends: 1651 [2021-11-12 22:29:10,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:29:10,642 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 378 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.99ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:10,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 2191 Invalid, 54 Unknown, 0 Unchecked, 9.99ms Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 171.39ms Time] [2021-11-12 22:29:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-12 22:29:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1639. [2021-11-12 22:29:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1320 states have (on average 1.4090909090909092) internal successors, (1860), 1320 states have internal predecessors, (1860), 234 states have call successors, (234), 85 states have call predecessors, (234), 84 states have return successors, (251), 233 states have call predecessors, (251), 233 states have call successors, (251) [2021-11-12 22:29:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2345 transitions. [2021-11-12 22:29:10,778 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2345 transitions. Word has length 51 [2021-11-12 22:29:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:10,778 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 2345 transitions. [2021-11-12 22:29:10,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:29:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2345 transitions. [2021-11-12 22:29:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:29:10,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:10,786 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:10,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:11,006 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash -819606002, now seen corresponding path program 1 times [2021-11-12 22:29:11,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:11,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715675993] [2021-11-12 22:29:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:11,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:11,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:11,011 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:11,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:29:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:29:11,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:29:11,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:29:12,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:12,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715675993] [2021-11-12 22:29:12,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715675993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:12,158 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:12,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:29:12,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93474827] [2021-11-12 22:29:12,158 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:12,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:29:12,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:29:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:29:12,160 INFO L87 Difference]: Start difference. First operand 1639 states and 2345 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:29:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:12,316 INFO L93 Difference]: Finished difference Result 2827 states and 4042 transitions. [2021-11-12 22:29:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:29:12,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 103 [2021-11-12 22:29:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:12,325 INFO L225 Difference]: With dead ends: 2827 [2021-11-12 22:29:12,326 INFO L226 Difference]: Without dead ends: 1197 [2021-11-12 22:29:12,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:29:12,331 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 48 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:12,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 815 Invalid, 17 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 88.00ms Time] [2021-11-12 22:29:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-11-12 22:29:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1168. [2021-11-12 22:29:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 950 states have (on average 1.408421052631579) internal successors, (1338), 950 states have internal predecessors, (1338), 159 states have call successors, (159), 59 states have call predecessors, (159), 58 states have return successors, (170), 158 states have call predecessors, (170), 158 states have call successors, (170) [2021-11-12 22:29:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1667 transitions. [2021-11-12 22:29:12,413 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1667 transitions. Word has length 103 [2021-11-12 22:29:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:12,415 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1667 transitions. [2021-11-12 22:29:12,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:29:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1667 transitions. [2021-11-12 22:29:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:29:12,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:12,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:12,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:12,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:12,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash -111126470, now seen corresponding path program 2 times [2021-11-12 22:29:12,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:12,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906573554] [2021-11-12 22:29:12,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:12,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:12,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:12,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:12,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:29:13,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 22:29:13,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:13,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:29:13,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:29:13,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:29:13,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:13,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906573554] [2021-11-12 22:29:13,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906573554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:13,859 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:13,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:29:13,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521995325] [2021-11-12 22:29:13,859 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:13,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:29:13,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:13,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:29:13,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:29:13,861 INFO L87 Difference]: Start difference. First operand 1168 states and 1667 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 22:29:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:13,957 INFO L93 Difference]: Finished difference Result 2329 states and 3347 transitions. [2021-11-12 22:29:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 103 [2021-11-12 22:29:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:13,968 INFO L225 Difference]: With dead ends: 2329 [2021-11-12 22:29:13,970 INFO L226 Difference]: Without dead ends: 1194 [2021-11-12 22:29:13,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:29:13,976 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 2 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.04ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:13,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1647 Invalid, 12 Unknown, 0 Unchecked, 4.04ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 30.35ms Time] [2021-11-12 22:29:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-12 22:29:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1188. [2021-11-12 22:29:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 964 states have (on average 1.4024896265560165) internal successors, (1352), 966 states have internal predecessors, (1352), 159 states have call successors, (159), 59 states have call predecessors, (159), 64 states have return successors, (180), 162 states have call predecessors, (180), 158 states have call successors, (180) [2021-11-12 22:29:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1691 transitions. [2021-11-12 22:29:14,045 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1691 transitions. Word has length 103 [2021-11-12 22:29:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:14,047 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 1691 transitions. [2021-11-12 22:29:14,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 22:29:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1691 transitions. [2021-11-12 22:29:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 22:29:14,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:14,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:14,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 22:29:14,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:14,270 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1864770281, now seen corresponding path program 1 times [2021-11-12 22:29:14,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:14,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772279018] [2021-11-12 22:29:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:14,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:14,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:14,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:14,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:29:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:29:15,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:29:15,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:15,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772279018] [2021-11-12 22:29:15,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772279018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:15,978 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:15,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 10 [2021-11-12 22:29:15,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322538833] [2021-11-12 22:29:15,978 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:15,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:29:15,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:29:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:29:15,981 INFO L87 Difference]: Start difference. First operand 1188 states and 1691 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 22:29:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:16,400 INFO L93 Difference]: Finished difference Result 2377 states and 3405 transitions. [2021-11-12 22:29:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:29:16,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 105 [2021-11-12 22:29:16,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:16,412 INFO L225 Difference]: With dead ends: 2377 [2021-11-12 22:29:16,412 INFO L226 Difference]: Without dead ends: 1222 [2021-11-12 22:29:16,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:29:16,417 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 16 mSDsluCounter, 3343 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 227.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3765 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 253.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:16,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3765 Invalid, 84 Unknown, 0 Unchecked, 8.57ms Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 253.05ms Time] [2021-11-12 22:29:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-11-12 22:29:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1210. [2021-11-12 22:29:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 980 states have (on average 1.3918367346938776) internal successors, (1364), 982 states have internal predecessors, (1364), 161 states have call successors, (161), 59 states have call predecessors, (161), 68 states have return successors, (188), 168 states have call predecessors, (188), 160 states have call successors, (188) [2021-11-12 22:29:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1713 transitions. [2021-11-12 22:29:16,481 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1713 transitions. Word has length 105 [2021-11-12 22:29:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:16,481 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1713 transitions. [2021-11-12 22:29:16,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 22:29:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1713 transitions. [2021-11-12 22:29:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:29:16,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:16,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:16,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 22:29:16,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:16,707 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash 222012825, now seen corresponding path program 1 times [2021-11-12 22:29:16,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:16,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115625479] [2021-11-12 22:29:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:16,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:16,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:16,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:16,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:29:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:17,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:29:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:29:18,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:29:19,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:19,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115625479] [2021-11-12 22:29:19,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115625479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:19,778 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:19,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 14] imperfect sequences [] total 15 [2021-11-12 22:29:19,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550767161] [2021-11-12 22:29:19,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:19,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:29:19,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:29:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:29:19,780 INFO L87 Difference]: Start difference. First operand 1210 states and 1713 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:29:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:21,121 INFO L93 Difference]: Finished difference Result 2728 states and 3910 transitions. [2021-11-12 22:29:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:29:21,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 2 states have call successors, (9) Word has length 111 [2021-11-12 22:29:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:21,135 INFO L225 Difference]: With dead ends: 2728 [2021-11-12 22:29:21,135 INFO L226 Difference]: Without dead ends: 1551 [2021-11-12 22:29:21,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:29:21,140 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 147 mSDsluCounter, 6276 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 825.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 6816 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 936.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:21,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 6816 Invalid, 212 Unknown, 0 Unchecked, 15.65ms Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 936.40ms Time] [2021-11-12 22:29:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2021-11-12 22:29:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1228. [2021-11-12 22:29:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 994 states have (on average 1.386317907444668) internal successors, (1378), 994 states have internal predecessors, (1378), 163 states have call successors, (163), 59 states have call predecessors, (163), 70 states have return successors, (194), 174 states have call predecessors, (194), 162 states have call successors, (194) [2021-11-12 22:29:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1735 transitions. [2021-11-12 22:29:21,215 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1735 transitions. Word has length 111 [2021-11-12 22:29:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:21,217 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 1735 transitions. [2021-11-12 22:29:21,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:29:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1735 transitions. [2021-11-12 22:29:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:29:21,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:21,243 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:21,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:21,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:21,461 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash -637345271, now seen corresponding path program 1 times [2021-11-12 22:29:21,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:21,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364411111] [2021-11-12 22:29:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:21,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:21,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:21,465 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:21,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:29:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:29:21,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:29:22,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:29:24,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:24,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364411111] [2021-11-12 22:29:24,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364411111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:24,385 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:24,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 14] imperfect sequences [] total 15 [2021-11-12 22:29:24,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131645654] [2021-11-12 22:29:24,385 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:24,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:29:24,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:29:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:29:24,386 INFO L87 Difference]: Start difference. First operand 1228 states and 1735 transitions. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:29:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:25,857 INFO L93 Difference]: Finished difference Result 2754 states and 3940 transitions. [2021-11-12 22:29:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:29:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-11-12 22:29:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:25,869 INFO L225 Difference]: With dead ends: 2754 [2021-11-12 22:29:25,870 INFO L226 Difference]: Without dead ends: 1559 [2021-11-12 22:29:25,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:29:25,875 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 145 mSDsluCounter, 6812 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 929.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 7352 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.23ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1071.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:25,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 7352 Invalid, 228 Unknown, 0 Unchecked, 12.23ms Time], IncrementalHoareTripleChecker [2 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 1071.08ms Time] [2021-11-12 22:29:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-11-12 22:29:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1236. [2021-11-12 22:29:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1002 states have (on average 1.3832335329341316) internal successors, (1386), 998 states have internal predecessors, (1386), 163 states have call successors, (163), 59 states have call predecessors, (163), 70 states have return successors, (194), 178 states have call predecessors, (194), 162 states have call successors, (194) [2021-11-12 22:29:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1743 transitions. [2021-11-12 22:29:25,936 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1743 transitions. Word has length 116 [2021-11-12 22:29:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:25,937 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1743 transitions. [2021-11-12 22:29:25,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:29:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1743 transitions. [2021-11-12 22:29:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:29:25,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:25,944 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:25,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:26,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:26,162 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:26,163 INFO L85 PathProgramCache]: Analyzing trace with hash 733297718, now seen corresponding path program 1 times [2021-11-12 22:29:26,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:26,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980270742] [2021-11-12 22:29:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:26,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:26,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:26,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:29:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:26,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:29:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:29:26,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:29:27,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:27,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980270742] [2021-11-12 22:29:27,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980270742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:27,185 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:27,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:29:27,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147364452] [2021-11-12 22:29:27,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:27,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:29:27,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:29:27,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:29:27,187 INFO L87 Difference]: Start difference. First operand 1236 states and 1743 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 22:29:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:27,237 INFO L93 Difference]: Finished difference Result 1860 states and 2633 transitions. [2021-11-12 22:29:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:29:27,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 121 [2021-11-12 22:29:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:27,245 INFO L225 Difference]: With dead ends: 1860 [2021-11-12 22:29:27,246 INFO L226 Difference]: Without dead ends: 1244 [2021-11-12 22:29:27,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:29:27,249 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 5 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:27,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 820 Invalid, 4 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 11.90ms Time] [2021-11-12 22:29:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-11-12 22:29:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1244. [2021-11-12 22:29:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1008 states have (on average 1.380952380952381) internal successors, (1392), 1006 states have internal predecessors, (1392), 163 states have call successors, (163), 59 states have call predecessors, (163), 72 states have return successors, (196), 178 states have call predecessors, (196), 162 states have call successors, (196) [2021-11-12 22:29:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1751 transitions. [2021-11-12 22:29:27,321 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1751 transitions. Word has length 121 [2021-11-12 22:29:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:27,322 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1751 transitions. [2021-11-12 22:29:27,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 22:29:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1751 transitions. [2021-11-12 22:29:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:29:27,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:27,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:27,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:27,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:27,547 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:27,548 INFO L85 PathProgramCache]: Analyzing trace with hash -884953163, now seen corresponding path program 1 times [2021-11-12 22:29:27,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:27,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760170579] [2021-11-12 22:29:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:27,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:27,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:27,550 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:27,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:29:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:28,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:29:28,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:29:28,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:29:29,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:29,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760170579] [2021-11-12 22:29:29,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760170579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:29,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:29,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 22:29:29,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664095167] [2021-11-12 22:29:29,205 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:29:29,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:29,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:29:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:29:29,206 INFO L87 Difference]: Start difference. First operand 1244 states and 1751 transitions. Second operand has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 22:29:31,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:33,238 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:36,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:39,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:41,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:43,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:45,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:50,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:52,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:54,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:56,205 INFO L93 Difference]: Finished difference Result 3133 states and 4429 transitions. [2021-11-12 22:29:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:29:56,206 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 123 [2021-11-12 22:29:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:56,219 INFO L225 Difference]: With dead ends: 3133 [2021-11-12 22:29:56,219 INFO L226 Difference]: Without dead ends: 1922 [2021-11-12 22:29:56,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:29:56,223 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 972 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 209 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26197.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.10ms SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26760.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:56,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 1936 Invalid, 1182 Unknown, 0 Unchecked, 16.10ms Time], IncrementalHoareTripleChecker [209 Valid, 963 Invalid, 10 Unknown, 0 Unchecked, 26760.52ms Time] [2021-11-12 22:29:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-11-12 22:29:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1884. [2021-11-12 22:29:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1520 states have (on average 1.3730263157894738) internal successors, (2087), 1518 states have internal predecessors, (2087), 249 states have call successors, (249), 91 states have call predecessors, (249), 114 states have return successors, (304), 274 states have call predecessors, (304), 248 states have call successors, (304) [2021-11-12 22:29:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2640 transitions. [2021-11-12 22:29:56,321 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2640 transitions. Word has length 123 [2021-11-12 22:29:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:56,322 INFO L470 AbstractCegarLoop]: Abstraction has 1884 states and 2640 transitions. [2021-11-12 22:29:56,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 22:29:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2640 transitions. [2021-11-12 22:29:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:29:56,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:56,327 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:56,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:56,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:56,546 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:56,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1998246592, now seen corresponding path program 1 times [2021-11-12 22:29:56,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:56,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704847337] [2021-11-12 22:29:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:56,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:56,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:56,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:56,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:29:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:57,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:29:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:29:57,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:29:57,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:57,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704847337] [2021-11-12 22:29:57,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704847337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:57,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:57,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:29:57,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087987730] [2021-11-12 22:29:57,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:57,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:29:57,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:57,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:29:57,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:57,615 INFO L87 Difference]: Start difference. First operand 1884 states and 2640 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:29:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:57,759 INFO L93 Difference]: Finished difference Result 4268 states and 6065 transitions. [2021-11-12 22:29:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:29:57,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 139 [2021-11-12 22:29:57,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:57,776 INFO L225 Difference]: With dead ends: 4268 [2021-11-12 22:29:57,776 INFO L226 Difference]: Without dead ends: 2417 [2021-11-12 22:29:57,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:57,782 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 224 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:57,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 954 Invalid, 17 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [14 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 67.55ms Time] [2021-11-12 22:29:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-11-12 22:29:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1872. [2021-11-12 22:29:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1514 states have (on average 1.3705416116248348) internal successors, (2075), 1512 states have internal predecessors, (2075), 243 states have call successors, (243), 91 states have call predecessors, (243), 114 states have return successors, (298), 268 states have call predecessors, (298), 242 states have call successors, (298) [2021-11-12 22:29:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2616 transitions. [2021-11-12 22:29:57,897 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2616 transitions. Word has length 139 [2021-11-12 22:29:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:57,898 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 2616 transitions. [2021-11-12 22:29:57,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:29:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2616 transitions. [2021-11-12 22:29:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:29:57,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:57,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:57,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:58,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:58,118 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2050252928, now seen corresponding path program 1 times [2021-11-12 22:29:58,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:58,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086379221] [2021-11-12 22:29:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:58,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:58,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:58,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:58,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:29:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:58,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:29:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:29:59,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:29:59,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:59,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086379221] [2021-11-12 22:29:59,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086379221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:59,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:59,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:29:59,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806208031] [2021-11-12 22:29:59,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:59,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:59,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:29:59,471 INFO L87 Difference]: Start difference. First operand 1872 states and 2616 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:30:01,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:01,742 INFO L93 Difference]: Finished difference Result 4280 states and 6101 transitions. [2021-11-12 22:30:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) Word has length 139 [2021-11-12 22:30:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:01,758 INFO L225 Difference]: With dead ends: 4280 [2021-11-12 22:30:01,758 INFO L226 Difference]: Without dead ends: 2441 [2021-11-12 22:30:01,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:30:01,766 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 225 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2124.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.50ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2175.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:01,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 2006 Invalid, 40 Unknown, 0 Unchecked, 3.50ms Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2175.85ms Time] [2021-11-12 22:30:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-11-12 22:30:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1896. [2021-11-12 22:30:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1532 states have (on average 1.3701044386422976) internal successors, (2099), 1536 states have internal predecessors, (2099), 243 states have call successors, (243), 91 states have call predecessors, (243), 120 states have return successors, (310), 268 states have call predecessors, (310), 242 states have call successors, (310) [2021-11-12 22:30:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2652 transitions. [2021-11-12 22:30:01,897 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2652 transitions. Word has length 139 [2021-11-12 22:30:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:01,898 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 2652 transitions. [2021-11-12 22:30:01,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:30:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2652 transitions. [2021-11-12 22:30:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 22:30:01,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:01,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:01,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:02,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:02,118 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:02,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1537384331, now seen corresponding path program 1 times [2021-11-12 22:30:02,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:02,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745762268] [2021-11-12 22:30:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:02,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:02,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:02,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:02,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:30:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:30:02,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:30:03,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:30:03,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:03,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745762268] [2021-11-12 22:30:03,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745762268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:03,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [675887143] [2021-11-12 22:30:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:03,512 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:03,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:03,517 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:03,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 22:30:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:04,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:30:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:04,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-12 22:30:04,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-12 22:30:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:30:04,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:05,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [675887143] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:05,002 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:05,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-12 22:30:05,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856620712] [2021-11-12 22:30:05,002 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:05,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:30:05,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:30:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:30:05,004 INFO L87 Difference]: Start difference. First operand 1896 states and 2652 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:30:07,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:08,796 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:11,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:12,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:14,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:18,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:20,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:22,026 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:24,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:27,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:31,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:33,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:35,805 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:38,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:38,404 INFO L93 Difference]: Finished difference Result 4244 states and 6042 transitions. [2021-11-12 22:30:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:38,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 140 [2021-11-12 22:30:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:38,421 INFO L225 Difference]: With dead ends: 4244 [2021-11-12 22:30:38,421 INFO L226 Difference]: Without dead ends: 2381 [2021-11-12 22:30:38,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:30:38,427 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 178 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 13 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32607.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33236.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:38,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1350 Invalid, 193 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [13 Valid, 172 Invalid, 8 Unknown, 0 Unchecked, 33236.14ms Time] [2021-11-12 22:30:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-11-12 22:30:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1920. [2021-11-12 22:30:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1556 states have (on average 1.3721079691516709) internal successors, (2135), 1560 states have internal predecessors, (2135), 243 states have call successors, (243), 91 states have call predecessors, (243), 120 states have return successors, (310), 268 states have call predecessors, (310), 242 states have call successors, (310) [2021-11-12 22:30:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 2688 transitions. [2021-11-12 22:30:38,608 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 2688 transitions. Word has length 140 [2021-11-12 22:30:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:38,608 INFO L470 AbstractCegarLoop]: Abstraction has 1920 states and 2688 transitions. [2021-11-12 22:30:38,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:30:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 2688 transitions. [2021-11-12 22:30:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 22:30:38,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:38,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:38,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:38,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:39,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:39,019 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash -341746615, now seen corresponding path program 1 times [2021-11-12 22:30:39,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:39,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810151363] [2021-11-12 22:30:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:39,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:39,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:39,022 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:39,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:30:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:39,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:30:39,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:30:39,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:30:40,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:40,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810151363] [2021-11-12 22:30:40,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810151363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:40,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [28925175] [2021-11-12 22:30:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:40,404 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:40,405 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:40,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:30:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:30:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:41,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:41,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [28925175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:41,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:41,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-12 22:30:41,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084776190] [2021-11-12 22:30:41,491 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:41,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:30:41,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:30:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:30:41,493 INFO L87 Difference]: Start difference. First operand 1920 states and 2688 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:30:43,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:45,589 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 [] [2021-11-12 22:30:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:45,836 INFO L93 Difference]: Finished difference Result 4370 states and 6215 transitions. [2021-11-12 22:30:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) Word has length 140 [2021-11-12 22:30:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:45,872 INFO L225 Difference]: With dead ends: 4370 [2021-11-12 22:30:45,872 INFO L226 Difference]: Without dead ends: 2483 [2021-11-12 22:30:45,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:30:45,880 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 224 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4182.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4231.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:45,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 2537 Invalid, 49 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 4231.55ms Time] [2021-11-12 22:30:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-11-12 22:30:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1926. [2021-11-12 22:30:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1562 states have (on average 1.3745198463508324) internal successors, (2147), 1566 states have internal predecessors, (2147), 243 states have call successors, (243), 91 states have call predecessors, (243), 120 states have return successors, (310), 268 states have call predecessors, (310), 242 states have call successors, (310) [2021-11-12 22:30:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2700 transitions. [2021-11-12 22:30:46,019 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2700 transitions. Word has length 140 [2021-11-12 22:30:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:46,019 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 2700 transitions. [2021-11-12 22:30:46,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:30:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2700 transitions. [2021-11-12 22:30:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 22:30:46,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:46,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:46,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:46,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:46,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:46,432 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:46,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:46,432 INFO L85 PathProgramCache]: Analyzing trace with hash 270640480, now seen corresponding path program 1 times [2021-11-12 22:30:46,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:46,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128980051] [2021-11-12 22:30:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:46,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:46,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:46,434 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:46,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:30:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:46,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:30:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:47,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:47,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:47,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128980051] [2021-11-12 22:30:47,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128980051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:47,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [691617181] [2021-11-12 22:30:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:47,822 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:47,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:47,823 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:47,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:30:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:48,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:30:48,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:48,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:49,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [691617181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:49,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603818751] [2021-11-12 22:30:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:49,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:30:49,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:30:49,315 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:30:49,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 22:30:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:49,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:30:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:50,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:50,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603818751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:50,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:30:50,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 9 [2021-11-12 22:30:50,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819689589] [2021-11-12 22:30:50,386 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:30:50,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:30:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:30:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:30:50,387 INFO L87 Difference]: Start difference. First operand 1926 states and 2700 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:30:52,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:54,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:54,762 INFO L93 Difference]: Finished difference Result 4418 states and 6299 transitions. [2021-11-12 22:30:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:30:54,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) Word has length 141 [2021-11-12 22:30:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:54,779 INFO L225 Difference]: With dead ends: 4418 [2021-11-12 22:30:54,779 INFO L226 Difference]: Without dead ends: 2525 [2021-11-12 22:30:54,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:30:54,785 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 124 mSDsluCounter, 2412 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4206.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.08ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4258.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:54,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 2945 Invalid, 69 Unknown, 0 Unchecked, 3.08ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 2 Unknown, 0 Unchecked, 4258.54ms Time] [2021-11-12 22:30:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-11-12 22:30:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1938. [2021-11-12 22:30:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1574 states have (on average 1.3792884371029226) internal successors, (2171), 1578 states have internal predecessors, (2171), 243 states have call successors, (243), 91 states have call predecessors, (243), 120 states have return successors, (310), 268 states have call predecessors, (310), 242 states have call successors, (310) [2021-11-12 22:30:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2724 transitions. [2021-11-12 22:30:54,907 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2724 transitions. Word has length 141 [2021-11-12 22:30:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:54,907 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 2724 transitions. [2021-11-12 22:30:54,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:30:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2724 transitions. [2021-11-12 22:30:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 22:30:54,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:54,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-12 22:30:54,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:55,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:55,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:55,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:55,534 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1785067495, now seen corresponding path program 2 times [2021-11-12 22:30:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:55,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248784937] [2021-11-12 22:30:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:30:55,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:55,536 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:55,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:30:59,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:30:59,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:30:59,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:30:59,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:59,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:31:00,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:00,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248784937] [2021-11-12 22:31:00,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248784937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:00,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [584806380] [2021-11-12 22:31:00,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:00,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:00,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:00,605 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:00,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:31:08,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:08,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:08,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:31:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:31:08,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:31:08,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [584806380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:08,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340995269] [2021-11-12 22:31:08,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:08,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:08,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:08,975 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:08,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 22:31:20,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:20,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:31:20,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:31:21,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:31:22,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340995269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:22,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:22,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2021-11-12 22:31:22,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582860712] [2021-11-12 22:31:22,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:22,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 22:31:22,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 22:31:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:31:22,149 INFO L87 Difference]: Start difference. First operand 1938 states and 2724 transitions. Second operand has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 5 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (19), 2 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 22:31:24,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:26,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:28,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:29,238 INFO L93 Difference]: Finished difference Result 4454 states and 6365 transitions. [2021-11-12 22:31:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:31:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 5 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (19), 2 states have call predecessors, (19), 5 states have call successors, (19) Word has length 142 [2021-11-12 22:31:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:29,252 INFO L225 Difference]: With dead ends: 4454 [2021-11-12 22:31:29,253 INFO L226 Difference]: Without dead ends: 2549 [2021-11-12 22:31:29,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:31:29,259 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 170 mSDsluCounter, 4934 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6715.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 5467 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.50ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6832.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:29,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 5467 Invalid, 187 Unknown, 0 Unchecked, 6.50ms Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 3 Unknown, 0 Unchecked, 6832.80ms Time] [2021-11-12 22:31:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-11-12 22:31:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1944. [2021-11-12 22:31:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1580 states have (on average 1.3816455696202532) internal successors, (2183), 1584 states have internal predecessors, (2183), 243 states have call successors, (243), 91 states have call predecessors, (243), 120 states have return successors, (310), 268 states have call predecessors, (310), 242 states have call successors, (310) [2021-11-12 22:31:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 2736 transitions. [2021-11-12 22:31:29,373 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 2736 transitions. Word has length 142 [2021-11-12 22:31:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:29,373 INFO L470 AbstractCegarLoop]: Abstraction has 1944 states and 2736 transitions. [2021-11-12 22:31:29,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 5 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (19), 2 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 22:31:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 2736 transitions. [2021-11-12 22:31:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 22:31:29,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:29,379 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:29,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:29,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:29,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-12 22:31:29,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:29,994 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:29,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1487664704, now seen corresponding path program 3 times [2021-11-12 22:31:29,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:29,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789429157] [2021-11-12 22:31:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:31:29,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:29,996 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:29,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:31:36,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:31:36,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:37,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:31:37,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:31:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:31:38,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:38,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789429157] [2021-11-12 22:31:38,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789429157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:38,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [308040533] [2021-11-12 22:31:38,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:31:38,295 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:38,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:38,296 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:38,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:34:35,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:34:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:35,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-12 22:34:35,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:37,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:37,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-12 22:34:37,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-12 22:34:38,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 22:34:38,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2021-11-12 22:34:38,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-11-12 22:34:38,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-12 22:34:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:34:38,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:34:40,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [308040533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:40,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273230908] [2021-11-12 22:34:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:34:40,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:40,335 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:40,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb928fa-7f46-4a31-9839-1691d8074cd8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process