./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.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_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/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_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/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_b1eabc56-1e9e-4695-a844-d464e33662cd/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 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:34,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:34,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:34,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:34,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:34,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:34,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:34,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:34,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:34,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:34,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:34,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:34,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:34,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:34,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:34,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:34,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:34,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:34,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:34,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:34,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:34,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:34,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:34,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:34,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:34,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:34,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:34,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:34,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:34,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:34,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:34,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:34,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:34,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:34,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:34,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:34,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:34,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:34,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:34,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:34,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:34,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:39:34,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:34,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:34,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:34,373 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:34,373 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:34,374 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:34,374 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:39:34,374 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:34,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:34,374 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:39:34,375 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:39:34,376 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:34,376 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:39:34,376 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:39:34,376 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:39:34,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:34,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:39:34,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:34,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:34,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:34,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:34,379 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:34,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:34,379 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:34,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:34,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:34,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:34,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:34,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:34,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:34,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:34,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:39:34,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:39:34,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:34,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:34,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:34,382 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_b1eabc56-1e9e-4695-a844-d464e33662cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 [2021-11-07 01:39:34,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:34,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:34,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:34,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:34,695 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:34,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:39:34,774 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data/0f24b8bca/79b1a8a3824d4b7dae21015b1e1f705b/FLAGa53bfde2e [2021-11-07 01:39:35,657 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:35,658 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:39:35,714 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data/0f24b8bca/79b1a8a3824d4b7dae21015b1e1f705b/FLAGa53bfde2e [2021-11-07 01:39:36,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data/0f24b8bca/79b1a8a3824d4b7dae21015b1e1f705b [2021-11-07 01:39:36,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:36,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:36,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:36,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:36,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:36,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:36" (1/1) ... [2021-11-07 01:39:36,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396432f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:36, skipping insertion in model container [2021-11-07 01:39:36,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:36" (1/1) ... [2021-11-07 01:39:36,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:36,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:37,436 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_b1eabc56-1e9e-4695-a844-d464e33662cd/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-11-07 01:39:37,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:37,925 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:39:37,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7be08bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:37, skipping insertion in model container [2021-11-07 01:39:37,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:37,927 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:39:37,929 INFO L168 Benchmark]: Toolchain (without parser) took 1804.64 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 67.8 MB in the beginning and 78.3 MB in the end (delta: -10.5 MB). Peak memory consumption was 41.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:37,930 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 96.5 MB. Free memory is still 75.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:39:37,931 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1786.42 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 67.5 MB in the beginning and 79.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 41.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:37,932 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 96.5 MB. Free memory is still 75.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1786.42 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 67.5 MB in the beginning and 79.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 41.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7340]: 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_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/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_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/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_b1eabc56-1e9e-4695-a844-d464e33662cd/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 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:40,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:40,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:40,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:40,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:40,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:40,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:40,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:40,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:40,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:40,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:40,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:40,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:40,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:40,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:40,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:40,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:40,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:40,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:40,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:40,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:40,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:40,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:40,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:40,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:40,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:40,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:40,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:40,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:40,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:40,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:40,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:40,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:40,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:40,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:40,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:40,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:40,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:40,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:40,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:40,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:40,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:39:40,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:40,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:40,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:40,509 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:40,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:40,510 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:40,510 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:40,510 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:40,511 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:40,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:40,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:40,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:40,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:40,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:40,515 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:40,515 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:39:40,515 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:39:40,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:40,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:40,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:40,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:40,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:39:40,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:40,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:40,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:40,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:40,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:40,518 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:39:40,519 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:40,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:40,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:40,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:40,520 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_b1eabc56-1e9e-4695-a844-d464e33662cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 [2021-11-07 01:39:40,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:40,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:40,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:40,967 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:40,968 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:40,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:39:41,039 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data/a93918d5f/d1e2434d78684bde9b5b9fea0f418571/FLAG53c836d69 [2021-11-07 01:39:42,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:42,035 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:39:42,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data/a93918d5f/d1e2434d78684bde9b5b9fea0f418571/FLAG53c836d69 [2021-11-07 01:39:42,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/data/a93918d5f/d1e2434d78684bde9b5b9fea0f418571 [2021-11-07 01:39:42,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:42,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:42,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:42,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:42,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:42,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:42" (1/1) ... [2021-11-07 01:39:42,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78fa4166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42, skipping insertion in model container [2021-11-07 01:39:42,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:42" (1/1) ... [2021-11-07 01:39:42,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:42,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:43,765 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_b1eabc56-1e9e-4695-a844-d464e33662cd/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-11-07 01:39:44,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:44,450 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:39:44,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:44,707 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_b1eabc56-1e9e-4695-a844-d464e33662cd/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-11-07 01:39:44,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:44,960 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:39:45,205 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_b1eabc56-1e9e-4695-a844-d464e33662cd/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-11-07 01:39:45,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:45,520 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:39:45,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45 WrapperNode [2021-11-07 01:39:45,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:45,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:45,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:39:45,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:39:45,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:45,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:45,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:45,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:39:45,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:39:45,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:39:45,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:45,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:45,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:46,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:46,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:46,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:46,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:46,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:39:46,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:39:46,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:39:46,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:39:46,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (1/1) ... [2021-11-07 01:39:46,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:46,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:46,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:39:46,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:39:46,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:39:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-07 01:39:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-07 01:39:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:39:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:39:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:39:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:39:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:39:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 01:39:46,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 01:39:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_submit_rx_urb [2021-11-07 01:39:46,371 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_submit_rx_urb [2021-11-07 01:39:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_rx_complete [2021-11-07 01:39:46,371 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_rx_complete [2021-11-07 01:39:46,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:39:46,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:39:46,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:39:46,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:39:46,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:39:46,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:39:46,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:39:46,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:39:46,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:39:46,373 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:39:46,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:39:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:39:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:39:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:39:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:39:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:39:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:39:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:39:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:39:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:39:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:39:46,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:39:46,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:39:46,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:39:46,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-11-07 01:39:46,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:39:46,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:40:31,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:40:31,287 INFO L299 CfgBuilder]: Removed 759 assume(true) statements. [2021-11-07 01:40:31,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:31 BoogieIcfgContainer [2021-11-07 01:40:31,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:40:31,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:40:31,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:40:31,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:40:31,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:42" (1/3) ... [2021-11-07 01:40:31,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76bf2355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:31, skipping insertion in model container [2021-11-07 01:40:31,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:45" (2/3) ... [2021-11-07 01:40:31,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76bf2355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:31, skipping insertion in model container [2021-11-07 01:40:31,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:31" (3/3) ... [2021-11-07 01:40:31,302 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:40:31,309 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:40:31,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:40:31,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:40:31,378 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:40:31,379 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:40:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 905 states, 879 states have (on average 1.4425483503981797) internal successors, (1268), 885 states have internal predecessors, (1268), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-07 01:40:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:40:31,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:31,433 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] [2021-11-07 01:40:31,433 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:40:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash 318801262, now seen corresponding path program 1 times [2021-11-07 01:40:31,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:31,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644172222] [2021-11-07 01:40:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:31,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:31,466 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:31,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:40:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:40:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:34,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:34,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:34,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644172222] [2021-11-07 01:40:34,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644172222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:34,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:34,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:34,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511870887] [2021-11-07 01:40:34,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:34,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:34,941 INFO L87 Difference]: Start difference. First operand has 905 states, 879 states have (on average 1.4425483503981797) internal successors, (1268), 885 states have internal predecessors, (1268), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:35,189 INFO L93 Difference]: Finished difference Result 1808 states and 2610 transitions. [2021-11-07 01:40:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 25 [2021-11-07 01:40:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:35,222 INFO L225 Difference]: With dead ends: 1808 [2021-11-07 01:40:35,223 INFO L226 Difference]: Without dead ends: 895 [2021-11-07 01:40:35,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-11-07 01:40:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2021-11-07 01:40:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 870 states have (on average 1.3954022988505748) internal successors, (1214), 875 states have internal predecessors, (1214), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-07 01:40:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1244 transitions. [2021-11-07 01:40:35,420 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1244 transitions. Word has length 25 [2021-11-07 01:40:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:35,421 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1244 transitions. [2021-11-07 01:40:35,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1244 transitions. [2021-11-07 01:40:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:40:35,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:35,434 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:40:35,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:35,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:35,647 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:40:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1900832078, now seen corresponding path program 1 times [2021-11-07 01:40:35,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:35,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211171804] [2021-11-07 01:40:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:35,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:35,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:35,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:40:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:38,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:40:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:38,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:39,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:39,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211171804] [2021-11-07 01:40:39,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211171804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:39,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1630988988] [2021-11-07 01:40:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:39,526 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:39,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:39,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:39,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:40:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:41,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:41,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:41,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1630988988] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:41,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:41,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:40:41,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871562489] [2021-11-07 01:40:41,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:41,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:41,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:41,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:40:41,550 INFO L87 Difference]: Start difference. First operand 895 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:44,815 INFO L93 Difference]: Finished difference Result 3263 states and 4572 transitions. [2021-11-07 01:40:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 27 [2021-11-07 01:40:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:44,840 INFO L225 Difference]: With dead ends: 3263 [2021-11-07 01:40:44,840 INFO L226 Difference]: Without dead ends: 2390 [2021-11-07 01:40:44,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:40:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-11-07 01:40:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2390. [2021-11-07 01:40:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2329 states have (on average 1.403177329325891) internal successors, (3268), 2336 states have internal predecessors, (3268), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-07 01:40:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 3350 transitions. [2021-11-07 01:40:44,980 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 3350 transitions. Word has length 27 [2021-11-07 01:40:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:44,981 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 3350 transitions. [2021-11-07 01:40:44,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 3350 transitions. [2021-11-07 01:40:44,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:40:44,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:44,984 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:40:45,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:45,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:40:45,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:45,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:40:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:45,399 INFO L85 PathProgramCache]: Analyzing trace with hash 269245308, now seen corresponding path program 1 times [2021-11-07 01:40:45,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:45,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141237977] [2021-11-07 01:40:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:45,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:45,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:45,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:45,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:40:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:48,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:40:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:48,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:49,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:49,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141237977] [2021-11-07 01:40:49,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141237977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:49,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471353114] [2021-11-07 01:40:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:49,671 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:49,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:49,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:49,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:40:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:51,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:40:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:52,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:53,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [471353114] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:53,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:53,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 01:40:53,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312735146] [2021-11-07 01:40:53,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:53,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:40:53,324 INFO L87 Difference]: Start difference. First operand 2390 states and 3350 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:54,697 INFO L93 Difference]: Finished difference Result 7124 states and 10120 transitions. [2021-11-07 01:40:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:54,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 37 [2021-11-07 01:40:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:54,748 INFO L225 Difference]: With dead ends: 7124 [2021-11-07 01:40:54,749 INFO L226 Difference]: Without dead ends: 4756 [2021-11-07 01:40:54,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:40:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4756 states. [2021-11-07 01:40:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4756 to 4744. [2021-11-07 01:40:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4744 states, 4627 states have (on average 1.3963691376701968) internal successors, (6461), 4637 states have internal predecessors, (6461), 82 states have call successors, (82), 30 states have call predecessors, (82), 30 states have return successors, (123), 82 states have call predecessors, (123), 82 states have call successors, (123) [2021-11-07 01:40:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4744 states to 4744 states and 6666 transitions. [2021-11-07 01:40:55,046 INFO L78 Accepts]: Start accepts. Automaton has 4744 states and 6666 transitions. Word has length 37 [2021-11-07 01:40:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:55,047 INFO L470 AbstractCegarLoop]: Abstraction has 4744 states and 6666 transitions. [2021-11-07 01:40:55,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4744 states and 6666 transitions. [2021-11-07 01:40:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:40:55,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:55,051 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:40:55,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:55,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:55,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:55,477 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:40:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash -243328671, now seen corresponding path program 1 times [2021-11-07 01:40:55,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:55,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642617641] [2021-11-07 01:40:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:55,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:55,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:55,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:55,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:40:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:40:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:59,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:59,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:59,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642617641] [2021-11-07 01:40:59,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642617641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:59,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1583181467] [2021-11-07 01:40:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:59,981 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:59,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:59,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:59,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:41:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:01,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:41:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:02,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:03,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1583181467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:03,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:03,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 01:41:03,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285941168] [2021-11-07 01:41:03,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:03,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:03,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:03,602 INFO L87 Difference]: Start difference. First operand 4744 states and 6666 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:08,080 INFO L93 Difference]: Finished difference Result 18837 states and 26954 transitions. [2021-11-07 01:41:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:08,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 38 [2021-11-07 01:41:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:08,210 INFO L225 Difference]: With dead ends: 18837 [2021-11-07 01:41:08,210 INFO L226 Difference]: Without dead ends: 14115 [2021-11-07 01:41:08,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2021-11-07 01:41:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 14005. [2021-11-07 01:41:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14005 states, 13664 states have (on average 1.3917593676814988) internal successors, (19017), 13688 states have internal predecessors, (19017), 246 states have call successors, (246), 90 states have call predecessors, (246), 90 states have return successors, (492), 244 states have call predecessors, (492), 246 states have call successors, (492) [2021-11-07 01:41:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14005 states to 14005 states and 19755 transitions. [2021-11-07 01:41:09,078 INFO L78 Accepts]: Start accepts. Automaton has 14005 states and 19755 transitions. Word has length 38 [2021-11-07 01:41:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:09,079 INFO L470 AbstractCegarLoop]: Abstraction has 14005 states and 19755 transitions. [2021-11-07 01:41:09,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 14005 states and 19755 transitions. [2021-11-07 01:41:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:41:09,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:09,083 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:41:09,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:09,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:09,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:09,515 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:41:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1046747174, now seen corresponding path program 1 times [2021-11-07 01:41:09,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:09,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226734599] [2021-11-07 01:41:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:09,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:09,524 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:09,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:41:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:41:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:13,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:13,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:13,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226734599] [2021-11-07 01:41:13,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226734599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:13,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [414020951] [2021-11-07 01:41:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:13,987 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:13,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:13,990 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:13,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:41:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:15,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:15,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:16,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:16,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [414020951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:16,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:16,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:41:16,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894147614] [2021-11-07 01:41:16,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:16,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:16,716 INFO L87 Difference]: Start difference. First operand 14005 states and 19755 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:17,246 INFO L93 Difference]: Finished difference Result 14107 states and 19889 transitions. [2021-11-07 01:41:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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 39 [2021-11-07 01:41:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:17,357 INFO L225 Difference]: With dead ends: 14107 [2021-11-07 01:41:17,357 INFO L226 Difference]: Without dead ends: 14105 [2021-11-07 01:41:17,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14105 states. [2021-11-07 01:41:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14105 to 14103. [2021-11-07 01:41:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14103 states, 13762 states have (on average 1.3913675337886935) internal successors, (19148), 13784 states have internal predecessors, (19148), 246 states have call successors, (246), 90 states have call predecessors, (246), 90 states have return successors, (492), 246 states have call predecessors, (492), 246 states have call successors, (492) [2021-11-07 01:41:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14103 states to 14103 states and 19886 transitions. [2021-11-07 01:41:18,171 INFO L78 Accepts]: Start accepts. Automaton has 14103 states and 19886 transitions. Word has length 39 [2021-11-07 01:41:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 14103 states and 19886 transitions. [2021-11-07 01:41:18,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 14103 states and 19886 transitions. [2021-11-07 01:41:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:41:18,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:18,177 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:41:18,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:18,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:18,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:18,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:41:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1910574581, now seen corresponding path program 1 times [2021-11-07 01:41:18,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:18,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199785634] [2021-11-07 01:41:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:18,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:18,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:18,608 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:18,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:41:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:41:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:21,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:22,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:22,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199785634] [2021-11-07 01:41:22,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199785634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:22,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1712601565] [2021-11-07 01:41:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:22,572 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:22,576 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:22,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:41:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:24,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:24,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:24,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:25,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1712601565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:25,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:25,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:41:25,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890847563] [2021-11-07 01:41:25,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:25,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:25,352 INFO L87 Difference]: Start difference. First operand 14103 states and 19886 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:25,710 INFO L93 Difference]: Finished difference Result 14103 states and 19886 transitions. [2021-11-07 01:41:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 40 [2021-11-07 01:41:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:25,760 INFO L225 Difference]: With dead ends: 14103 [2021-11-07 01:41:25,761 INFO L226 Difference]: Without dead ends: 14101 [2021-11-07 01:41:25,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14101 states. [2021-11-07 01:41:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14101 to 14101. [2021-11-07 01:41:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14101 states, 13761 states have (on average 1.3913233049923697) internal successors, (19146), 13782 states have internal predecessors, (19146), 246 states have call successors, (246), 90 states have call predecessors, (246), 90 states have return successors, (492), 246 states have call predecessors, (492), 246 states have call successors, (492) [2021-11-07 01:41:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14101 states to 14101 states and 19884 transitions. [2021-11-07 01:41:26,497 INFO L78 Accepts]: Start accepts. Automaton has 14101 states and 19884 transitions. Word has length 40 [2021-11-07 01:41:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:26,500 INFO L470 AbstractCegarLoop]: Abstraction has 14101 states and 19884 transitions. [2021-11-07 01:41:26,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 14101 states and 19884 transitions. [2021-11-07 01:41:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:41:26,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:26,503 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:41:26,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:26,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:26,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:26,918 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:41:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash 901731536, now seen corresponding path program 1 times [2021-11-07 01:41:26,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:26,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988162382] [2021-11-07 01:41:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:26,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:26,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:26,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:41:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:41:30,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:30,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:31,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:31,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988162382] [2021-11-07 01:41:31,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988162382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:31,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [206803073] [2021-11-07 01:41:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:31,308 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:31,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:31,309 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:41:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:33,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:33,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:33,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:34,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [206803073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:34,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:34,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:41:34,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928908709] [2021-11-07 01:41:34,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:34,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:34,337 INFO L87 Difference]: Start difference. First operand 14101 states and 19884 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 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 01:41:34,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:34,732 INFO L93 Difference]: Finished difference Result 14101 states and 19884 transitions. [2021-11-07 01:41:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:34,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 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 01:41:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:34,789 INFO L225 Difference]: With dead ends: 14101 [2021-11-07 01:41:34,790 INFO L226 Difference]: Without dead ends: 14013 [2021-11-07 01:41:34,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-11-07 01:41:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 14013. [2021-11-07 01:41:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14013 states, 13676 states have (on average 1.391269377010822) internal successors, (19027), 13696 states have internal predecessors, (19027), 244 states have call successors, (244), 90 states have call predecessors, (244), 90 states have return successors, (484), 244 states have call predecessors, (484), 244 states have call successors, (484) [2021-11-07 01:41:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14013 states to 14013 states and 19755 transitions. [2021-11-07 01:41:35,500 INFO L78 Accepts]: Start accepts. Automaton has 14013 states and 19755 transitions. Word has length 41 [2021-11-07 01:41:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:35,501 INFO L470 AbstractCegarLoop]: Abstraction has 14013 states and 19755 transitions. [2021-11-07 01:41:35,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 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 01:41:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 14013 states and 19755 transitions. [2021-11-07 01:41:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:41:35,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:35,508 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:41:35,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:35,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:35,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:35,932 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:41:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:35,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1810741607, now seen corresponding path program 1 times [2021-11-07 01:41:35,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:35,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129140261] [2021-11-07 01:41:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:35,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:35,939 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:35,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:41:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:41:39,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:41:39,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:41:40,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:40,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129140261] [2021-11-07 01:41:40,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129140261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:40,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [612684322] [2021-11-07 01:41:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:40,481 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:40,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:40,482 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:40,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 01:41:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:42,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:43,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [612684322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:43,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:43,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:41:43,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912700577] [2021-11-07 01:41:43,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:43,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:43,248 INFO L87 Difference]: Start difference. First operand 14013 states and 19755 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:44,973 INFO L93 Difference]: Finished difference Result 37699 states and 52938 transitions. [2021-11-07 01:41:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 62 [2021-11-07 01:41:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:45,052 INFO L225 Difference]: With dead ends: 37699 [2021-11-07 01:41:45,052 INFO L226 Difference]: Without dead ends: 23708 [2021-11-07 01:41:45,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23708 states. [2021-11-07 01:41:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23708 to 23459. [2021-11-07 01:41:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23459 states, 22878 states have (on average 1.3845615875513593) internal successors, (31676), 22921 states have internal predecessors, (31676), 398 states have call successors, (398), 180 states have call predecessors, (398), 180 states have return successors, (788), 393 states have call predecessors, (788), 398 states have call successors, (788) [2021-11-07 01:41:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23459 states to 23459 states and 32862 transitions. [2021-11-07 01:41:46,110 INFO L78 Accepts]: Start accepts. Automaton has 23459 states and 32862 transitions. Word has length 62 [2021-11-07 01:41:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:46,110 INFO L470 AbstractCegarLoop]: Abstraction has 23459 states and 32862 transitions. [2021-11-07 01:41:46,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 23459 states and 32862 transitions. [2021-11-07 01:41:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:41:46,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:46,123 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:41:46,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:46,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:46,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:46,548 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:41:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:46,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1679557817, now seen corresponding path program 1 times [2021-11-07 01:41:46,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:46,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552672856] [2021-11-07 01:41:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:46,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:46,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:46,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:46,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:41:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:49,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:41:49,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:50,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:51,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:51,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552672856] [2021-11-07 01:41:51,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552672856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:51,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261718274] [2021-11-07 01:41:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:51,357 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:51,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:51,359 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:51,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:41:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:53,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:53,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:53,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:54,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261718274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:54,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:54,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:41:54,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565295797] [2021-11-07 01:41:54,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:54,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:54,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:54,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:54,291 INFO L87 Difference]: Start difference. First operand 23459 states and 32862 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:56,098 INFO L93 Difference]: Finished difference Result 57346 states and 80712 transitions. [2021-11-07 01:41:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:56,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 77 [2021-11-07 01:41:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:56,228 INFO L225 Difference]: With dead ends: 57346 [2021-11-07 01:41:56,228 INFO L226 Difference]: Without dead ends: 33700 [2021-11-07 01:41:56,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33700 states. [2021-11-07 01:41:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33700 to 33357. [2021-11-07 01:41:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33357 states, 32413 states have (on average 1.393854317712029) internal successors, (45179), 32489 states have internal predecessors, (45179), 646 states have call successors, (646), 295 states have call predecessors, (646), 295 states have return successors, (1264), 631 states have call predecessors, (1264), 646 states have call successors, (1264) [2021-11-07 01:41:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33357 states to 33357 states and 47089 transitions. [2021-11-07 01:41:58,021 INFO L78 Accepts]: Start accepts. Automaton has 33357 states and 47089 transitions. Word has length 77 [2021-11-07 01:41:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:58,022 INFO L470 AbstractCegarLoop]: Abstraction has 33357 states and 47089 transitions. [2021-11-07 01:41:58,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 33357 states and 47089 transitions. [2021-11-07 01:41:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:41:58,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:58,036 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] [2021-11-07 01:41:58,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:58,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:58,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:58,460 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:41:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1822166231, now seen corresponding path program 1 times [2021-11-07 01:41:58,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:58,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312459541] [2021-11-07 01:41:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:58,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:58,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:58,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:58,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:42:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:01,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:02,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:03,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:03,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312459541] [2021-11-07 01:42:03,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312459541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:03,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1249298753] [2021-11-07 01:42:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:03,340 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:03,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:03,341 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:03,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:42:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:42:05,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:42:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1249298753] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:06,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:06,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:42:06,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059109900] [2021-11-07 01:42:06,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:42:06,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:42:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:42:06,440 INFO L87 Difference]: Start difference. First operand 33357 states and 47089 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:11,449 INFO L93 Difference]: Finished difference Result 56435 states and 79684 transitions. [2021-11-07 01:42:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:42:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 78 [2021-11-07 01:42:11,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:11,539 INFO L225 Difference]: With dead ends: 56435 [2021-11-07 01:42:11,539 INFO L226 Difference]: Without dead ends: 23090 [2021-11-07 01:42:11,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:42:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23090 states. [2021-11-07 01:42:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23090 to 22918. [2021-11-07 01:42:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22918 states, 22256 states have (on average 1.3947250179726816) internal successors, (31041), 22314 states have internal predecessors, (31041), 454 states have call successors, (454), 205 states have call predecessors, (454), 205 states have return successors, (880), 439 states have call predecessors, (880), 454 states have call successors, (880) [2021-11-07 01:42:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22918 states to 22918 states and 32375 transitions. [2021-11-07 01:42:13,047 INFO L78 Accepts]: Start accepts. Automaton has 22918 states and 32375 transitions. Word has length 78 [2021-11-07 01:42:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:13,048 INFO L470 AbstractCegarLoop]: Abstraction has 22918 states and 32375 transitions. [2021-11-07 01:42:13,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 22918 states and 32375 transitions. [2021-11-07 01:42:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:42:13,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:13,058 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] [2021-11-07 01:42:13,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:13,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-07 01:42:13,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:13,480 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:42:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash 463916306, now seen corresponding path program 1 times [2021-11-07 01:42:13,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:13,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109792933] [2021-11-07 01:42:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:13,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:13,485 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:13,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:42:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:16,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:17,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:18,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:18,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109792933] [2021-11-07 01:42:18,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109792933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:18,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1850018362] [2021-11-07 01:42:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:18,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:18,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:18,461 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:18,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:42:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:42:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:42:21,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:42:22,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1850018362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:22,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:22,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:42:22,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264295638] [2021-11-07 01:42:22,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:22,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:42:22,006 INFO L87 Difference]: Start difference. First operand 22918 states and 32375 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:29,629 INFO L93 Difference]: Finished difference Result 109777 states and 155624 transitions. [2021-11-07 01:42:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 80 [2021-11-07 01:42:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:30,065 INFO L225 Difference]: With dead ends: 109777 [2021-11-07 01:42:30,065 INFO L226 Difference]: Without dead ends: 86896 [2021-11-07 01:42:30,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:42:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86896 states. [2021-11-07 01:42:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86896 to 23302. [2021-11-07 01:42:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 22640 states have (on average 1.3922703180212015) internal successors, (31521), 22698 states have internal predecessors, (31521), 454 states have call successors, (454), 205 states have call predecessors, (454), 205 states have return successors, (880), 439 states have call predecessors, (880), 454 states have call successors, (880) [2021-11-07 01:42:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 32855 transitions. [2021-11-07 01:42:32,212 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 32855 transitions. Word has length 80 [2021-11-07 01:42:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:32,213 INFO L470 AbstractCegarLoop]: Abstraction has 23302 states and 32855 transitions. [2021-11-07 01:42:32,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 32855 transitions. [2021-11-07 01:42:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:42:32,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:32,223 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] [2021-11-07 01:42:32,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:32,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:32,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:32,640 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:42:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 553106550, now seen corresponding path program 1 times [2021-11-07 01:42:32,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:32,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535132893] [2021-11-07 01:42:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:32,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:32,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:32,646 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:32,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:42:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:35,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:35,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:36,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:37,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:37,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535132893] [2021-11-07 01:42:37,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535132893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:37,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [445884993] [2021-11-07 01:42:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:37,731 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:37,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:37,733 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:37,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:42:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:41,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:42,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:42,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [445884993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:42,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501434626] [2021-11-07 01:42:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:42,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:42,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:42,684 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:42:42,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 01:42:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:45,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:42:45,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:42:45,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:42:46,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501434626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:46,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:42:46,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 01:42:46,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862692199] [2021-11-07 01:42:46,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:46,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:46,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:42:46,318 INFO L87 Difference]: Start difference. First operand 23302 states and 32855 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:49,191 INFO L93 Difference]: Finished difference Result 55458 states and 78548 transitions. [2021-11-07 01:42:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:42:49,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 82 [2021-11-07 01:42:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:49,289 INFO L225 Difference]: With dead ends: 55458 [2021-11-07 01:42:49,289 INFO L226 Difference]: Without dead ends: 32193 [2021-11-07 01:42:49,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:42:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32193 states. [2021-11-07 01:42:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32193 to 23302. [2021-11-07 01:42:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 22640 states have (on average 1.3920053003533568) internal successors, (31515), 22698 states have internal predecessors, (31515), 454 states have call successors, (454), 205 states have call predecessors, (454), 205 states have return successors, (880), 439 states have call predecessors, (880), 454 states have call successors, (880) [2021-11-07 01:42:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 32849 transitions. [2021-11-07 01:42:51,228 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 32849 transitions. Word has length 82 [2021-11-07 01:42:51,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:51,228 INFO L470 AbstractCegarLoop]: Abstraction has 23302 states and 32849 transitions. [2021-11-07 01:42:51,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 32849 transitions. [2021-11-07 01:42:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:42:51,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:51,238 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] [2021-11-07 01:42:51,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:51,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-07 01:42:51,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:51,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:51,839 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:42:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1780286088, now seen corresponding path program 1 times [2021-11-07 01:42:51,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:51,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773224512] [2021-11-07 01:42:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:51,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:51,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:51,844 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:51,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:42:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:55,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:56,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:42:57,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:57,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773224512] [2021-11-07 01:42:57,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773224512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:57,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [308212044] [2021-11-07 01:42:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:57,659 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:57,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:57,667 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:57,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:43:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:43:02,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:43:02,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:43:03,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [308212044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:03,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370013409] [2021-11-07 01:43:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:03,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:03,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:03,254 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:43:03,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 01:43:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:05,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:43:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:43:06,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:43:06,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370013409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:06,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:43:06,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 01:43:06,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300546385] [2021-11-07 01:43:06,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:06,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:06,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:06,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:06,647 INFO L87 Difference]: Start difference. First operand 23302 states and 32849 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:09,788 INFO L93 Difference]: Finished difference Result 55477 states and 78555 transitions. [2021-11-07 01:43:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:09,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 82 [2021-11-07 01:43:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:09,863 INFO L225 Difference]: With dead ends: 55477 [2021-11-07 01:43:09,863 INFO L226 Difference]: Without dead ends: 32212 [2021-11-07 01:43:09,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:43:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32212 states. [2021-11-07 01:43:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32212 to 23302. [2021-11-07 01:43:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 22640 states have (on average 1.3917402826855123) internal successors, (31509), 22698 states have internal predecessors, (31509), 454 states have call successors, (454), 205 states have call predecessors, (454), 205 states have return successors, (880), 439 states have call predecessors, (880), 454 states have call successors, (880) [2021-11-07 01:43:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 32843 transitions. [2021-11-07 01:43:11,748 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 32843 transitions. Word has length 82 [2021-11-07 01:43:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:11,749 INFO L470 AbstractCegarLoop]: Abstraction has 23302 states and 32843 transitions. [2021-11-07 01:43:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 32843 transitions. [2021-11-07 01:43:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:43:11,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:11,758 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] [2021-11-07 01:43:11,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 01:43:11,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:12,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:12,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:12,372 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:43:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2033600950, now seen corresponding path program 1 times [2021-11-07 01:43:12,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:12,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892277036] [2021-11-07 01:43:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:12,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:12,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:12,378 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:12,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:43:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:43:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:43:17,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:43:18,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:18,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892277036] [2021-11-07 01:43:18,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892277036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:18,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1492158443] [2021-11-07 01:43:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:18,203 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:18,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:18,204 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:18,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:43:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:22,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:43:22,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:43:23,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:43:24,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1492158443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:24,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7668684] [2021-11-07 01:43:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:24,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:24,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:24,063 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:43:24,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eabc56-1e9e-4695-a844-d464e33662cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 01:43:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:26,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:43:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:43:28,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:43:30,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7668684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:30,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:43:30,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 22 [2021-11-07 01:43:30,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953511037] [2021-11-07 01:43:30,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:43:30,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:43:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:43:30,791 INFO L87 Difference]: Start difference. First operand 23302 states and 32843 transitions. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 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 01:44:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:24,332 INFO L93 Difference]: Finished difference Result 183325 states and 258932 transitions. [2021-11-07 01:44:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 01:44:24,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 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 82 [2021-11-07 01:44:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:24,875 INFO L225 Difference]: With dead ends: 183325 [2021-11-07 01:44:24,876 INFO L226 Difference]: Without dead ends: 160060 [2021-11-07 01:44:24,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=686, Invalid=3096, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 01:44:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160060 states.