./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 73b3ed2538f968a3e44c5d7fd04ec7d3b91dc8bba4b6c9eed0228eaab08d1208 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:07:43,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:07:43,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:07:43,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:07:43,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:07:43,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:07:43,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:07:43,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:07:43,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:07:43,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:07:43,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:07:43,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:07:43,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:07:43,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:07:43,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:07:43,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:07:43,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:07:43,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:07:43,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:07:43,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:07:43,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:07:43,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:07:43,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:07:43,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:07:43,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:07:43,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:07:43,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:07:43,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:07:43,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:07:43,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:07:43,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:07:43,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:07:43,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:07:43,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:07:43,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:07:43,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:07:43,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:07:43,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:07:43,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:07:43,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:07:43,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:07:43,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:07:43,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:07:43,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:07:43,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:07:43,962 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:07:43,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:07:43,963 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:07:43,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:07:43,964 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:07:43,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:07:43,968 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:07:43,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:07:43,970 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:07:43,971 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:07:43,971 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:07:43,971 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:07:43,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:07:43,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:07:43,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:07:43,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:07:43,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:07:43,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:07:43,974 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:07:43,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:07:43,975 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:07:43,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:07:43,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:07:43,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:07:43,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:43,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:07:43,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:07:43,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:07:43,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:07:43,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:07:43,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:07:43,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:07:43,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:07:43,981 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_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73b3ed2538f968a3e44c5d7fd04ec7d3b91dc8bba4b6c9eed0228eaab08d1208 [2021-11-07 02:07:44,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:07:44,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:07:44,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:07:44,425 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:07:44,426 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:07:44,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i [2021-11-07 02:07:44,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data/20b3e0e1c/eaf724dbfe2348ab833a203aad56dddd/FLAGa482bb215 [2021-11-07 02:07:45,557 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:07:45,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i [2021-11-07 02:07:45,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data/20b3e0e1c/eaf724dbfe2348ab833a203aad56dddd/FLAGa482bb215 [2021-11-07 02:07:45,976 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data/20b3e0e1c/eaf724dbfe2348ab833a203aad56dddd [2021-11-07 02:07:45,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:07:45,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:07:45,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:45,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:07:45,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:07:45,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:45" (1/1) ... [2021-11-07 02:07:45,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112402b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:45, skipping insertion in model container [2021-11-07 02:07:45,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:45" (1/1) ... [2021-11-07 02:07:46,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:07:46,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:47,154 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_ad4069c7-534c-4d54-a685-526cdc99d73d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i[153414,153427] [2021-11-07 02:07:47,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:47,596 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:07:47,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63870318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:47, skipping insertion in model container [2021-11-07 02:07:47,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:47,598 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:07:47,602 INFO L168 Benchmark]: Toolchain (without parser) took 1617.13 ms. Allocated memory was 115.3 MB in the beginning and 140.5 MB in the end (delta: 25.2 MB). Free memory was 65.4 MB in the beginning and 104.7 MB in the end (delta: -39.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:07:47,603 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 115.3 MB. Free memory is still 89.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:07:47,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1610.55 ms. Allocated memory was 115.3 MB in the beginning and 140.5 MB in the end (delta: 25.2 MB). Free memory was 65.2 MB in the beginning and 104.7 MB in the end (delta: -39.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:07:47,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 115.3 MB. Free memory is still 89.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1610.55 ms. Allocated memory was 115.3 MB in the beginning and 140.5 MB in the end (delta: 25.2 MB). Free memory was 65.2 MB in the beginning and 104.7 MB in the end (delta: -39.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5409]: 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_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 73b3ed2538f968a3e44c5d7fd04ec7d3b91dc8bba4b6c9eed0228eaab08d1208 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:07:50,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:07:50,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:07:50,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:07:50,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:07:50,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:07:50,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:07:50,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:07:50,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:07:50,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:07:50,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:07:50,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:07:50,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:07:50,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:07:50,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:07:50,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:07:50,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:07:50,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:07:50,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:07:50,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:07:50,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:07:50,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:07:50,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:07:50,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:07:50,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:07:50,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:07:50,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:07:50,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:07:50,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:07:50,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:07:50,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:07:50,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:07:50,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:07:50,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:07:50,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:07:50,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:07:50,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:07:50,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:07:50,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:07:50,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:07:50,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:07:50,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:07:50,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:07:50,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:07:50,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:07:50,849 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:07:50,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:07:50,850 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:07:50,850 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:07:50,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:07:50,850 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:07:50,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:07:50,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:07:50,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:07:50,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:07:50,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:07:50,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:07:50,855 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:07:50,855 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:07:50,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:07:50,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:07:50,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:07:50,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:07:50,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:07:50,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:07:50,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:50,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:07:50,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:07:50,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:07:50,858 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:07:50,858 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:50,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:07:50,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:07:50,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:07:50,860 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_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73b3ed2538f968a3e44c5d7fd04ec7d3b91dc8bba4b6c9eed0228eaab08d1208 [2021-11-07 02:07:51,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:07:51,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:07:51,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:07:51,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:07:51,420 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:07:51,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i [2021-11-07 02:07:51,534 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data/1120ad970/c29fe85e1a6746429acbd47a841f4a72/FLAG4d2de35fe [2021-11-07 02:07:52,537 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:07:52,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i [2021-11-07 02:07:52,593 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data/1120ad970/c29fe85e1a6746429acbd47a841f4a72/FLAG4d2de35fe [2021-11-07 02:07:52,985 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/data/1120ad970/c29fe85e1a6746429acbd47a841f4a72 [2021-11-07 02:07:52,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:07:52,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:07:52,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:52,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:07:52,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:07:52,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:52" (1/1) ... [2021-11-07 02:07:52,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2743672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:52, skipping insertion in model container [2021-11-07 02:07:52,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:52" (1/1) ... [2021-11-07 02:07:53,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:07:53,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:54,115 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_ad4069c7-534c-4d54-a685-526cdc99d73d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i[153414,153427] [2021-11-07 02:07:54,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:54,461 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:07:54,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:54,735 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_ad4069c7-534c-4d54-a685-526cdc99d73d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i[153414,153427] [2021-11-07 02:07:54,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:54,868 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:07:55,100 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_ad4069c7-534c-4d54-a685-526cdc99d73d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i[153414,153427] [2021-11-07 02:07:55,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:55,301 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:07:55,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55 WrapperNode [2021-11-07 02:07:55,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:55,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:07:55,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:07:55,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:07:55,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:07:55,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:07:55,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:07:55,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:07:55,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:07:55,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:07:55,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:07:55,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:07:55,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (1/1) ... [2021-11-07 02:07:55,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:55,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:55,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:07:55,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:07:55,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:07:55,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:07:55,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:07:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:07:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:07:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:07:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:07:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:07:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:07:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:07:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:07:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:07:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:07:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:07:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:07:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:07:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:07:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:07:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:07:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:07:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:07:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:07:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:07:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:07:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:07:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:07:55,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:08:03,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:08:03,187 INFO L299 CfgBuilder]: Removed 115 assume(true) statements. [2021-11-07 02:08:03,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:03 BoogieIcfgContainer [2021-11-07 02:08:03,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:08:03,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:08:03,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:08:03,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:08:03,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:07:52" (1/3) ... [2021-11-07 02:08:03,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2ba271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:03, skipping insertion in model container [2021-11-07 02:08:03,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:55" (2/3) ... [2021-11-07 02:08:03,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2ba271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:03, skipping insertion in model container [2021-11-07 02:08:03,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:03" (3/3) ... [2021-11-07 02:08:03,207 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1051.ko-entry_point.cil.out.i [2021-11-07 02:08:03,215 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:08:03,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:08:03,338 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:08:03,351 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:08:03,358 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:08:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.5068493150684932) internal successors, (220), 147 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:08:03,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:03,403 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:03,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:03,417 INFO L85 PathProgramCache]: Analyzing trace with hash -115689923, now seen corresponding path program 1 times [2021-11-07 02:08:03,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:03,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182950826] [2021-11-07 02:08:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:03,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:03,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:03,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:03,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:08:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:03,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:08:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:03,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:04,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:04,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182950826] [2021-11-07 02:08:04,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182950826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:04,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:04,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:08:04,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703428019] [2021-11-07 02:08:04,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:08:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:08:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:08:04,109 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.5068493150684932) internal successors, (220), 147 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:04,175 INFO L93 Difference]: Finished difference Result 292 states and 435 transitions. [2021-11-07 02:08:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:08:04,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 02:08:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:04,193 INFO L225 Difference]: With dead ends: 292 [2021-11-07 02:08:04,193 INFO L226 Difference]: Without dead ends: 141 [2021-11-07 02:08:04,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:08:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-07 02:08:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-07 02:08:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3857142857142857) internal successors, (194), 140 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 194 transitions. [2021-11-07 02:08:04,257 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 194 transitions. Word has length 20 [2021-11-07 02:08:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:04,258 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 194 transitions. [2021-11-07 02:08:04,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 194 transitions. [2021-11-07 02:08:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:08:04,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:04,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:04,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:04,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:04,483 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1704037825, now seen corresponding path program 1 times [2021-11-07 02:08:04,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:04,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124196177] [2021-11-07 02:08:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:04,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:04,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:04,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:04,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:08:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:08:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:04,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:05,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:05,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124196177] [2021-11-07 02:08:05,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124196177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:05,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:05,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:08:05,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149791915] [2021-11-07 02:08:05,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:05,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:05,084 INFO L87 Difference]: Start difference. First operand 141 states and 194 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:05,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:05,144 INFO L93 Difference]: Finished difference Result 275 states and 381 transitions. [2021-11-07 02:08:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:05,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 02:08:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:05,148 INFO L225 Difference]: With dead ends: 275 [2021-11-07 02:08:05,148 INFO L226 Difference]: Without dead ends: 142 [2021-11-07 02:08:05,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-07 02:08:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-07 02:08:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3829787234042554) internal successors, (195), 141 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-11-07 02:08:05,167 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 20 [2021-11-07 02:08:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:05,168 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-11-07 02:08:05,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-11-07 02:08:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 02:08:05,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:05,184 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:05,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:05,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:05,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:05,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1330507575, now seen corresponding path program 1 times [2021-11-07 02:08:05,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:05,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735818003] [2021-11-07 02:08:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:05,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:05,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:05,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:08:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:05,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:05,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:05,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:05,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735818003] [2021-11-07 02:08:05,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735818003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:05,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:05,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:08:05,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079273716] [2021-11-07 02:08:05,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:05,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:05,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:05,961 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:06,261 INFO L93 Difference]: Finished difference Result 501 states and 707 transitions. [2021-11-07 02:08:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:08:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 02:08:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:06,272 INFO L225 Difference]: With dead ends: 501 [2021-11-07 02:08:06,273 INFO L226 Difference]: Without dead ends: 369 [2021-11-07 02:08:06,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-07 02:08:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-11-07 02:08:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.4103260869565217) internal successors, (519), 368 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 519 transitions. [2021-11-07 02:08:06,345 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 519 transitions. Word has length 21 [2021-11-07 02:08:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:06,347 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 519 transitions. [2021-11-07 02:08:06,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 519 transitions. [2021-11-07 02:08:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:08:06,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:06,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:06,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:06,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:06,573 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 378992180, now seen corresponding path program 1 times [2021-11-07 02:08:06,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:06,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74878001] [2021-11-07 02:08:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:06,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:06,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:06,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:08:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:06,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:08:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:07,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:07,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:07,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74878001] [2021-11-07 02:08:07,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74878001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:07,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:07,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:08:07,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139715701] [2021-11-07 02:08:07,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:07,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:07,146 INFO L87 Difference]: Start difference. First operand 369 states and 519 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:07,259 INFO L93 Difference]: Finished difference Result 727 states and 1025 transitions. [2021-11-07 02:08:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:08:07,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 02:08:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:07,266 INFO L225 Difference]: With dead ends: 727 [2021-11-07 02:08:07,266 INFO L226 Difference]: Without dead ends: 368 [2021-11-07 02:08:07,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:08:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-07 02:08:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2021-11-07 02:08:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.4032697547683923) internal successors, (515), 367 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 515 transitions. [2021-11-07 02:08:07,299 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 515 transitions. Word has length 26 [2021-11-07 02:08:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:07,299 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 515 transitions. [2021-11-07 02:08:07,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 515 transitions. [2021-11-07 02:08:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:08:07,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:07,303 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:08:07,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:07,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:07,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash -851983094, now seen corresponding path program 1 times [2021-11-07 02:08:07,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:07,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655475388] [2021-11-07 02:08:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:07,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:07,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:07,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:07,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:08:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:07,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:08,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:08,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:08,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655475388] [2021-11-07 02:08:08,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655475388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:08,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:08,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 02:08:08,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670211743] [2021-11-07 02:08:08,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:08:08,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:08:08,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:08:08,522 INFO L87 Difference]: Start difference. First operand 368 states and 515 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:08,801 INFO L93 Difference]: Finished difference Result 1082 states and 1522 transitions. [2021-11-07 02:08:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:08:08,804 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 02:08:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:08,816 INFO L225 Difference]: With dead ends: 1082 [2021-11-07 02:08:08,816 INFO L226 Difference]: Without dead ends: 720 [2021-11-07 02:08:08,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-11-07 02:08:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 708. [2021-11-07 02:08:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 1.4073550212164074) internal successors, (995), 707 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 995 transitions. [2021-11-07 02:08:08,906 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 995 transitions. Word has length 41 [2021-11-07 02:08:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:08,907 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 995 transitions. [2021-11-07 02:08:08,907 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 995 transitions. [2021-11-07 02:08:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:08:08,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:08,912 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:08,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:09,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:09,131 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash 139833107, now seen corresponding path program 1 times [2021-11-07 02:08:09,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:09,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187010352] [2021-11-07 02:08:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:09,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:09,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:09,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:09,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:08:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:09,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:08:09,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:10,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:10,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:10,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187010352] [2021-11-07 02:08:10,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187010352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:10,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:10,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-07 02:08:10,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429199607] [2021-11-07 02:08:10,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:10,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:10,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:10,346 INFO L87 Difference]: Start difference. First operand 708 states and 995 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:11,084 INFO L93 Difference]: Finished difference Result 1575 states and 2219 transitions. [2021-11-07 02:08:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:08:11,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:08:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:11,093 INFO L225 Difference]: With dead ends: 1575 [2021-11-07 02:08:11,093 INFO L226 Difference]: Without dead ends: 877 [2021-11-07 02:08:11,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:08:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-11-07 02:08:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 708. [2021-11-07 02:08:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 1.3903818953323903) internal successors, (983), 707 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 983 transitions. [2021-11-07 02:08:11,167 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 983 transitions. Word has length 68 [2021-11-07 02:08:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:11,168 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 983 transitions. [2021-11-07 02:08:11,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 983 transitions. [2021-11-07 02:08:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:08:11,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:11,171 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:11,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:11,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:11,386 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash -161142632, now seen corresponding path program 1 times [2021-11-07 02:08:11,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:11,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123303982] [2021-11-07 02:08:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:11,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:11,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:11,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:11,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:08:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:12,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 02:08:12,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:12,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:13,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:13,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123303982] [2021-11-07 02:08:13,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123303982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:13,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:13,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 18 [2021-11-07 02:08:13,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965802588] [2021-11-07 02:08:13,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:08:13,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:08:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:08:13,951 INFO L87 Difference]: Start difference. First operand 708 states and 983 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:16,005 INFO L93 Difference]: Finished difference Result 1563 states and 2177 transitions. [2021-11-07 02:08:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:08:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:08:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:16,013 INFO L225 Difference]: With dead ends: 1563 [2021-11-07 02:08:16,014 INFO L226 Difference]: Without dead ends: 865 [2021-11-07 02:08:16,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:08:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-07 02:08:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 696. [2021-11-07 02:08:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 1.3798561151079136) internal successors, (959), 695 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 959 transitions. [2021-11-07 02:08:16,100 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 959 transitions. Word has length 70 [2021-11-07 02:08:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:16,103 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 959 transitions. [2021-11-07 02:08:16,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 959 transitions. [2021-11-07 02:08:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:08:16,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:16,107 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:16,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:16,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:16,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:16,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:16,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1822810923, now seen corresponding path program 1 times [2021-11-07 02:08:16,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:16,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77614005] [2021-11-07 02:08:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:16,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:16,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:16,326 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:16,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:08:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:17,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:17,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:17,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77614005] [2021-11-07 02:08:17,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77614005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:17,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:17,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:08:17,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773831646] [2021-11-07 02:08:17,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:17,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:17,555 INFO L87 Difference]: Start difference. First operand 696 states and 959 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:17,706 INFO L93 Difference]: Finished difference Result 1524 states and 2105 transitions. [2021-11-07 02:08:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:17,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 02:08:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:17,715 INFO L225 Difference]: With dead ends: 1524 [2021-11-07 02:08:17,715 INFO L226 Difference]: Without dead ends: 838 [2021-11-07 02:08:17,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-11-07 02:08:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 678. [2021-11-07 02:08:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.3633677991137372) internal successors, (923), 677 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 923 transitions. [2021-11-07 02:08:17,792 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 923 transitions. Word has length 89 [2021-11-07 02:08:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:17,792 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 923 transitions. [2021-11-07 02:08:17,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 923 transitions. [2021-11-07 02:08:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:08:17,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:17,796 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:17,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:18,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:18,021 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 78880981, now seen corresponding path program 1 times [2021-11-07 02:08:18,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:18,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857534445] [2021-11-07 02:08:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:18,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:18,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:18,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:08:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:18,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:19,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:19,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:19,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857534445] [2021-11-07 02:08:19,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857534445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:19,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:19,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:08:19,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011651387] [2021-11-07 02:08:19,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:19,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:19,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:08:19,329 INFO L87 Difference]: Start difference. First operand 678 states and 923 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:21,506 INFO L93 Difference]: Finished difference Result 1352 states and 1847 transitions. [2021-11-07 02:08:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:08:21,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 02:08:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:21,514 INFO L225 Difference]: With dead ends: 1352 [2021-11-07 02:08:21,514 INFO L226 Difference]: Without dead ends: 684 [2021-11-07 02:08:21,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:08:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-11-07 02:08:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2021-11-07 02:08:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.3601756954612005) internal successors, (929), 683 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 929 transitions. [2021-11-07 02:08:21,589 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 929 transitions. Word has length 89 [2021-11-07 02:08:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:21,590 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 929 transitions. [2021-11-07 02:08:21,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 929 transitions. [2021-11-07 02:08:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 02:08:21,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:21,594 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:21,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:21,819 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 214088388, now seen corresponding path program 1 times [2021-11-07 02:08:21,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:21,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316489439] [2021-11-07 02:08:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:21,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:21,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:21,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:21,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:08:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:22,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:23,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:23,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:23,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316489439] [2021-11-07 02:08:23,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316489439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:23,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [589904175] [2021-11-07 02:08:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:23,509 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:23,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:23,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 02:08:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:24,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:08:24,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:08:25,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [589904175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:25,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:25,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 02:08:25,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507292107] [2021-11-07 02:08:25,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:25,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:25,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:08:25,154 INFO L87 Difference]: Start difference. First operand 684 states and 929 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:27,483 INFO L93 Difference]: Finished difference Result 1641 states and 2225 transitions. [2021-11-07 02:08:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:08:27,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 02:08:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:27,492 INFO L225 Difference]: With dead ends: 1641 [2021-11-07 02:08:27,492 INFO L226 Difference]: Without dead ends: 967 [2021-11-07 02:08:27,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:08:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-07 02:08:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 696. [2021-11-07 02:08:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 1.353956834532374) internal successors, (941), 695 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 941 transitions. [2021-11-07 02:08:27,578 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 941 transitions. Word has length 90 [2021-11-07 02:08:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:27,580 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 941 transitions. [2021-11-07 02:08:27,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 941 transitions. [2021-11-07 02:08:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:08:27,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:27,584 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:27,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:27,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:27,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:27,989 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash -944025308, now seen corresponding path program 1 times [2021-11-07 02:08:27,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:27,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526385045] [2021-11-07 02:08:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:27,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:27,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:27,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:27,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:08:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:29,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:29,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:29,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526385045] [2021-11-07 02:08:29,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526385045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:29,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1953229725] [2021-11-07 02:08:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:29,642 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:29,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:29,643 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:29,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:08:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:30,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:31,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:31,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1953229725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173877447] [2021-11-07 02:08:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:31,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:31,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:31,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 02:08:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:32,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:33,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173877447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:33,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:33,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 02:08:33,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757954933] [2021-11-07 02:08:33,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:33,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:33,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:08:33,037 INFO L87 Difference]: Start difference. First operand 696 states and 941 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:33,415 INFO L93 Difference]: Finished difference Result 2544 states and 3470 transitions. [2021-11-07 02:08:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:08:33,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:08:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:33,432 INFO L225 Difference]: With dead ends: 2544 [2021-11-07 02:08:33,432 INFO L226 Difference]: Without dead ends: 1858 [2021-11-07 02:08:33,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:08:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-11-07 02:08:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 876. [2021-11-07 02:08:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 1.318857142857143) internal successors, (1154), 875 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1154 transitions. [2021-11-07 02:08:33,570 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1154 transitions. Word has length 92 [2021-11-07 02:08:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:33,571 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1154 transitions. [2021-11-07 02:08:33,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1154 transitions. [2021-11-07 02:08:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:08:33,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:33,575 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:33,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:33,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:34,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:34,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:34,207 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:34,208 INFO L85 PathProgramCache]: Analyzing trace with hash -68006302, now seen corresponding path program 1 times [2021-11-07 02:08:34,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:34,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572433059] [2021-11-07 02:08:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:34,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:34,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:34,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:34,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:08:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:35,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:35,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:35,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:35,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572433059] [2021-11-07 02:08:35,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572433059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:35,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1275066995] [2021-11-07 02:08:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:35,966 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:35,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:35,968 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:35,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:08:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:37,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:37,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:37,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:38,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1275066995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:38,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909295347] [2021-11-07 02:08:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:38,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:38,062 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:38,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 02:08:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:39,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:40,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909295347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:40,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:40,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 02:08:40,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878243524] [2021-11-07 02:08:40,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:40,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:40,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:40,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:40,304 INFO L87 Difference]: Start difference. First operand 876 states and 1154 transitions. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:42,571 INFO L93 Difference]: Finished difference Result 6890 states and 9104 transitions. [2021-11-07 02:08:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:08:42,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:08:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:42,615 INFO L225 Difference]: With dead ends: 6890 [2021-11-07 02:08:42,616 INFO L226 Difference]: Without dead ends: 6448 [2021-11-07 02:08:42,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:08:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2021-11-07 02:08:43,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 2596. [2021-11-07 02:08:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2595 states have (on average 1.3202312138728323) internal successors, (3426), 2595 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 3426 transitions. [2021-11-07 02:08:43,019 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 3426 transitions. Word has length 92 [2021-11-07 02:08:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:43,020 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 3426 transitions. [2021-11-07 02:08:43,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 3426 transitions. [2021-11-07 02:08:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:08:43,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:43,025 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:43,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:43,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 02:08:43,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:08:43,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:43,635 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 566529827, now seen corresponding path program 1 times [2021-11-07 02:08:43,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:43,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980827153] [2021-11-07 02:08:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:43,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:43,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:43,638 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:43,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:08:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:44,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:45,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:45,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:45,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980827153] [2021-11-07 02:08:45,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980827153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:45,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1862700145] [2021-11-07 02:08:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:45,517 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:45,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:45,518 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:45,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 02:08:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:46,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:08:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:47,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:47,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1862700145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:47,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:47,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:08:47,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731655576] [2021-11-07 02:08:47,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:47,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:47,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:08:47,477 INFO L87 Difference]: Start difference. First operand 2596 states and 3426 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:48,890 INFO L93 Difference]: Finished difference Result 14555 states and 19147 transitions. [2021-11-07 02:08:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:08:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 02:08:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:48,961 INFO L225 Difference]: With dead ends: 14555 [2021-11-07 02:08:48,961 INFO L226 Difference]: Without dead ends: 11969 [2021-11-07 02:08:48,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:08:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11969 states. [2021-11-07 02:08:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11969 to 2737. [2021-11-07 02:08:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 1.3278508771929824) internal successors, (3633), 2736 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 3633 transitions. [2021-11-07 02:08:49,487 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 3633 transitions. Word has length 94 [2021-11-07 02:08:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:49,488 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 3633 transitions. [2021-11-07 02:08:49,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 3633 transitions. [2021-11-07 02:08:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 02:08:49,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:49,493 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:49,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:49,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:49,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:49,900 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash 251547779, now seen corresponding path program 1 times [2021-11-07 02:08:49,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:49,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880044467] [2021-11-07 02:08:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:49,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:49,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:49,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:49,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:08:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:51,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:08:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:51,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:51,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:51,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880044467] [2021-11-07 02:08:51,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880044467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:51,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:51,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:08:51,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231887128] [2021-11-07 02:08:51,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:51,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:51,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:08:51,998 INFO L87 Difference]: Start difference. First operand 2737 states and 3633 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:52,581 INFO L93 Difference]: Finished difference Result 5681 states and 7537 transitions. [2021-11-07 02:08:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:08:52,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 02:08:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:52,591 INFO L225 Difference]: With dead ends: 5681 [2021-11-07 02:08:52,591 INFO L226 Difference]: Without dead ends: 2954 [2021-11-07 02:08:52,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:08:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-11-07 02:08:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2509. [2021-11-07 02:08:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2508 states have (on average 1.3277511961722488) internal successors, (3330), 2508 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3330 transitions. [2021-11-07 02:08:53,109 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3330 transitions. Word has length 96 [2021-11-07 02:08:53,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:53,109 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3330 transitions. [2021-11-07 02:08:53,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3330 transitions. [2021-11-07 02:08:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 02:08:53,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:53,114 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:08:53,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:53,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:53,338 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:53,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1600431562, now seen corresponding path program 1 times [2021-11-07 02:08:53,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:53,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013323907] [2021-11-07 02:08:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:53,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:53,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:53,342 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:53,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:08:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:54,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:08:55,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:08:55,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:55,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013323907] [2021-11-07 02:08:55,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013323907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:55,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [316961606] [2021-11-07 02:08:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:55,534 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:55,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:55,535 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:55,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:08:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:57,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:08:57,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:08:57,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [316961606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:57,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391128112] [2021-11-07 02:08:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:57,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:57,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:57,924 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:57,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 02:08:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:59,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:08:59,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:09:00,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391128112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:00,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:00,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 17 [2021-11-07 02:09:00,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2200802] [2021-11-07 02:09:00,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 02:09:00,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 02:09:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:09:00,452 INFO L87 Difference]: Start difference. First operand 2509 states and 3330 transitions. Second operand has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:05,650 INFO L93 Difference]: Finished difference Result 5052 states and 6808 transitions. [2021-11-07 02:09:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:09:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 02:09:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:05,659 INFO L225 Difference]: With dead ends: 5052 [2021-11-07 02:09:05,659 INFO L226 Difference]: Without dead ends: 2767 [2021-11-07 02:09:05,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:09:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-11-07 02:09:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2689. [2021-11-07 02:09:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 1.3169642857142858) internal successors, (3540), 2688 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 3540 transitions. [2021-11-07 02:09:06,157 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 3540 transitions. Word has length 96 [2021-11-07 02:09:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:06,158 INFO L470 AbstractCegarLoop]: Abstraction has 2689 states and 3540 transitions. [2021-11-07 02:09:06,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 3540 transitions. [2021-11-07 02:09:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:09:06,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:06,162 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:06,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:06,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:06,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:06,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:06,778 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash -694335263, now seen corresponding path program 2 times [2021-11-07 02:09:06,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:06,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116771976] [2021-11-07 02:09:06,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:06,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:06,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:06,781 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:06,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:09:08,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:08,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:08,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:09:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:09:09,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:09:09,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:09,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116771976] [2021-11-07 02:09:09,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116771976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:09,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [886308984] [2021-11-07 02:09:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:09,768 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:09,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:09,773 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:09,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:09:12,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:12,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:09:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:09:12,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:09:13,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [886308984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:13,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077481447] [2021-11-07 02:09:13,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:13,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:13,226 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:13,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 02:09:15,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:15,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:15,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:09:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:09:15,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:09:16,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077481447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:16,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:16,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-07 02:09:16,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56062897] [2021-11-07 02:09:16,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:09:16,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:09:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:09:16,477 INFO L87 Difference]: Start difference. First operand 2689 states and 3540 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:25,807 INFO L93 Difference]: Finished difference Result 5352 states and 7108 transitions. [2021-11-07 02:09:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:09:25,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 02:09:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:25,817 INFO L225 Difference]: With dead ends: 5352 [2021-11-07 02:09:25,817 INFO L226 Difference]: Without dead ends: 2887 [2021-11-07 02:09:25,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:09:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-11-07 02:09:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2809. [2021-11-07 02:09:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 1.3034188034188035) internal successors, (3660), 2808 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3660 transitions. [2021-11-07 02:09:26,360 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3660 transitions. Word has length 99 [2021-11-07 02:09:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:26,361 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 3660 transitions. [2021-11-07 02:09:26,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3660 transitions. [2021-11-07 02:09:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 02:09:26,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:26,365 INFO L513 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:26,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:26,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 02:09:26,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-07 02:09:26,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:26,978 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:26,979 INFO L85 PathProgramCache]: Analyzing trace with hash 916310945, now seen corresponding path program 3 times [2021-11-07 02:09:26,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:26,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947288130] [2021-11-07 02:09:26,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:09:26,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:26,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:26,981 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:26,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:09:41,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 02:09:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:41,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:09:41,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:09:42,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:09:43,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:43,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947288130] [2021-11-07 02:09:43,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947288130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:43,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [121101610] [2021-11-07 02:09:43,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:09:43,872 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:43,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:43,873 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:43,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:16:25,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 02:16:25,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:16:25,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:16:25,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:16:26,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:16:26,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [121101610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:26,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457682999] [2021-11-07 02:16:26,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:16:26,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:16:26,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:16:26,800 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:16:26,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4069c7-534c-4d54-a685-526cdc99d73d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process