./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/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 32bit --witnessprinter.graph.data.programhash 9e43379b3f2624d77eec1084820c7c07499f5ec4432514ab066d4f5cf96eeebc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:03:51,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:03:51,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:03:51,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:03:51,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:03:51,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:03:51,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:03:51,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:03:51,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:03:51,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:03:51,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:03:51,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:03:51,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:03:51,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:03:51,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:03:51,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:03:51,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:03:51,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:03:51,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:03:51,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:03:51,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:03:51,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:03:51,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:03:51,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:03:51,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:03:51,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:03:51,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:03:51,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:03:51,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:03:51,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:03:51,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:03:51,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:03:51,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:03:51,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:03:51,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:03:51,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:03:51,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:03:51,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:03:51,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:03:51,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:03:51,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:03:51,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:03:51,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:03:51,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:03:51,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:03:51,272 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:03:51,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:03:51,273 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:03:51,273 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:03:51,273 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:03:51,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:03:51,274 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:03:51,275 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:03:51,275 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:03:51,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:03:51,276 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:03:51,276 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:03:51,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:03:51,277 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:03:51,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:03:51,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:03:51,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:03:51,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:03:51,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:03:51,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:03:51,279 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:03:51,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:03:51,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:03:51,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:03:51,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:03:51,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:03:51,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:03:51,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:03:51,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:03:51,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:03:51,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:03:51,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:03:51,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:03:51,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:03:51,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:03:51,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:03:51,283 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e43379b3f2624d77eec1084820c7c07499f5ec4432514ab066d4f5cf96eeebc [2021-11-07 02:03:51,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:03:51,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:03:51,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:03:51,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:03:51,612 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:03:51,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i [2021-11-07 02:03:51,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data/71a131641/b7ca08425e464c04872f4bca58a6c25a/FLAG74483d26d [2021-11-07 02:03:52,389 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:03:52,393 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i [2021-11-07 02:03:52,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data/71a131641/b7ca08425e464c04872f4bca58a6c25a/FLAG74483d26d [2021-11-07 02:03:52,625 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data/71a131641/b7ca08425e464c04872f4bca58a6c25a [2021-11-07 02:03:52,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:03:52,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:03:52,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:52,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:03:52,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:03:52,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:52" (1/1) ... [2021-11-07 02:03:52,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c8685f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:52, skipping insertion in model container [2021-11-07 02:03:52,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:52" (1/1) ... [2021-11-07 02:03:52,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:03:52,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:03:53,111 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[33021,33034] [2021-11-07 02:03:53,241 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44124,44137] [2021-11-07 02:03:53,243 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44245,44258] [2021-11-07 02:03:53,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:53,285 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:03:53,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@779f870e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:53, skipping insertion in model container [2021-11-07 02:03:53,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:53,287 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:03:53,289 INFO L168 Benchmark]: Toolchain (without parser) took 659.89 ms. Allocated memory is still 113.2 MB. Free memory was 83.2 MB in the beginning and 63.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:03:53,290 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory was 48.6 MB in the beginning and 48.5 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:03:53,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 657.04 ms. Allocated memory is still 113.2 MB. Free memory was 82.9 MB in the beginning and 63.9 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:03:53,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory was 48.6 MB in the beginning and 48.5 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 657.04 ms. Allocated memory is still 113.2 MB. Free memory was 82.9 MB in the beginning and 63.9 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/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 32bit --witnessprinter.graph.data.programhash 9e43379b3f2624d77eec1084820c7c07499f5ec4432514ab066d4f5cf96eeebc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:03:55,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:03:55,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:03:55,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:03:55,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:03:55,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:03:55,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:03:55,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:03:55,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:03:55,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:03:55,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:03:55,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:03:55,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:03:55,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:03:55,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:03:55,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:03:55,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:03:55,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:03:55,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:03:55,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:03:55,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:03:55,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:03:55,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:03:55,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:03:55,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:03:55,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:03:55,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:03:55,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:03:55,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:03:55,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:03:55,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:03:55,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:03:55,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:03:55,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:03:55,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:03:55,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:03:55,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:03:55,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:03:55,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:03:55,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:03:55,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:03:55,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:03:55,674 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:03:55,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:03:55,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:03:55,676 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:03:55,677 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:03:55,677 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:03:55,677 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:03:55,677 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:03:55,678 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:03:55,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:03:55,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:03:55,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:03:55,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:03:55,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:03:55,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:03:55,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:03:55,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:03:55,682 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:03:55,682 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:03:55,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:03:55,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:03:55,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:03:55,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:03:55,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:03:55,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:03:55,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:03:55,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:03:55,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:03:55,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:03:55,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:03:55,685 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:03:55,685 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:55,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:03:55,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:03:55,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:03:55,686 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e43379b3f2624d77eec1084820c7c07499f5ec4432514ab066d4f5cf96eeebc [2021-11-07 02:03:56,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:03:56,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:03:56,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:03:56,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:03:56,124 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:03:56,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i [2021-11-07 02:03:56,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data/77e10ebca/1e0865e0e4514503ae5b0d24364c595a/FLAGc9a0e24be [2021-11-07 02:03:56,851 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:03:56,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i [2021-11-07 02:03:56,876 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data/77e10ebca/1e0865e0e4514503ae5b0d24364c595a/FLAGc9a0e24be [2021-11-07 02:03:57,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/data/77e10ebca/1e0865e0e4514503ae5b0d24364c595a [2021-11-07 02:03:57,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:03:57,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:03:57,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:57,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:03:57,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:03:57,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:57" (1/1) ... [2021-11-07 02:03:57,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cfcdc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:57, skipping insertion in model container [2021-11-07 02:03:57,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:57" (1/1) ... [2021-11-07 02:03:57,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:03:57,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:03:57,739 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[33021,33034] [2021-11-07 02:03:57,892 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44124,44137] [2021-11-07 02:03:57,895 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44245,44258] [2021-11-07 02:03:57,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:57,947 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:03:57,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:03:58,014 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[33021,33034] [2021-11-07 02:03:58,102 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44124,44137] [2021-11-07 02:03:58,103 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44245,44258] [2021-11-07 02:03:58,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:58,118 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:03:58,144 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[33021,33034] [2021-11-07 02:03:58,200 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44124,44137] [2021-11-07 02:03:58,201 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_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44245,44258] [2021-11-07 02:03:58,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:58,267 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:03:58,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58 WrapperNode [2021-11-07 02:03:58,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:58,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:03:58,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:03:58,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:03:58,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:03:58,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:03:58,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:03:58,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:03:58,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:03:58,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:03:58,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:03:58,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:03:58,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (1/1) ... [2021-11-07 02:03:58,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:03:58,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:03:58,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:03:58,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:03:58,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:03:58,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:03:58,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:03:58,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:03:58,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:03:58,697 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 02:03:58,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:03:58,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:03:58,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:03:58,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:03:58,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:03:58,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:04:05,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:04:05,510 INFO L299 CfgBuilder]: Removed 82 assume(true) statements. [2021-11-07 02:04:05,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:05 BoogieIcfgContainer [2021-11-07 02:04:05,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:04:05,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:04:05,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:04:05,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:04:05,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:03:57" (1/3) ... [2021-11-07 02:04:05,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628cc99e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:05, skipping insertion in model container [2021-11-07 02:04:05,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:58" (2/3) ... [2021-11-07 02:04:05,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628cc99e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:05, skipping insertion in model container [2021-11-07 02:04:05,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:05" (3/3) ... [2021-11-07 02:04:05,522 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test7-2.i [2021-11-07 02:04:05,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:04:05,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:04:05,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:04:05,602 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:04:05,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:04:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:04:05,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:05,634 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:05,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-07 02:04:05,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:05,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961286987] [2021-11-07 02:04:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:05,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:05,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:05,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:05,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:04:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:04:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:05,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:06,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:06,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961286987] [2021-11-07 02:04:06,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961286987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:06,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:06,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:04:06,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072669558] [2021-11-07 02:04:06,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:04:06,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:04:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:06,041 INFO L87 Difference]: Start difference. First operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:06,099 INFO L93 Difference]: Finished difference Result 419 states and 707 transitions. [2021-11-07 02:04:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:04:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-07 02:04:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:06,115 INFO L225 Difference]: With dead ends: 419 [2021-11-07 02:04:06,115 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 02:04:06,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 02:04:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-07 02:04:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 176 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-07 02:04:06,169 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-07 02:04:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:06,170 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-07 02:04:06,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-07 02:04:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 02:04:06,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:06,172 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:06,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:06,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:06,385 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:06,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-07 02:04:06,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:06,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398212837] [2021-11-07 02:04:06,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:06,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:06,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:06,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:04:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:06,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:06,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:06,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:06,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398212837] [2021-11-07 02:04:06,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398212837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:06,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:06,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:04:06,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404058418] [2021-11-07 02:04:06,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:06,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:06,875 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:11,021 INFO L93 Difference]: Finished difference Result 460 states and 606 transitions. [2021-11-07 02:04:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:11,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-07 02:04:11,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:11,026 INFO L225 Difference]: With dead ends: 460 [2021-11-07 02:04:11,026 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 02:04:11,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:04:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 02:04:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2021-11-07 02:04:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 278 states have (on average 1.3273381294964028) internal successors, (369), 279 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 369 transitions. [2021-11-07 02:04:11,051 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 369 transitions. Word has length 10 [2021-11-07 02:04:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:11,051 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 369 transitions. [2021-11-07 02:04:11,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 369 transitions. [2021-11-07 02:04:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:04:11,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:11,053 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:11,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:11,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:11,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash 627335073, now seen corresponding path program 1 times [2021-11-07 02:04:11,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:11,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864723567] [2021-11-07 02:04:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:11,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:11,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:11,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:11,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:04:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:11,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:11,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:11,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:11,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864723567] [2021-11-07 02:04:11,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864723567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:11,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:11,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:04:11,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349366548] [2021-11-07 02:04:11,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:04:11,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:11,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:04:11,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:04:11,847 INFO L87 Difference]: Start difference. First operand 280 states and 369 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:12,003 INFO L93 Difference]: Finished difference Result 450 states and 593 transitions. [2021-11-07 02:04:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 44 [2021-11-07 02:04:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:12,010 INFO L225 Difference]: With dead ends: 450 [2021-11-07 02:04:12,010 INFO L226 Difference]: Without dead ends: 302 [2021-11-07 02:04:12,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-07 02:04:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 286. [2021-11-07 02:04:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 1.2640845070422535) internal successors, (359), 285 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 359 transitions. [2021-11-07 02:04:12,050 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 359 transitions. Word has length 44 [2021-11-07 02:04:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:12,051 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 359 transitions. [2021-11-07 02:04:12,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 359 transitions. [2021-11-07 02:04:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:04:12,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:12,053 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:12,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:12,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:12,269 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash -317553387, now seen corresponding path program 1 times [2021-11-07 02:04:12,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:12,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503200857] [2021-11-07 02:04:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:12,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:12,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:12,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:12,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:04:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:04:12,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:12,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:13,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:13,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503200857] [2021-11-07 02:04:13,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503200857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:13,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:13,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 9 [2021-11-07 02:04:13,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747041550] [2021-11-07 02:04:13,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:04:13,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:04:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:04:13,468 INFO L87 Difference]: Start difference. First operand 286 states and 359 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:13,640 INFO L93 Difference]: Finished difference Result 442 states and 547 transitions. [2021-11-07 02:04:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:04:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:13,644 INFO L225 Difference]: With dead ends: 442 [2021-11-07 02:04:13,645 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 02:04:13,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:04:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 02:04:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 274. [2021-11-07 02:04:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 272 states have (on average 1.2463235294117647) internal successors, (339), 273 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 339 transitions. [2021-11-07 02:04:13,677 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 339 transitions. Word has length 44 [2021-11-07 02:04:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:13,678 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 339 transitions. [2021-11-07 02:04:13,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 339 transitions. [2021-11-07 02:04:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:04:13,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:13,686 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:13,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:13,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:13,900 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:13,901 INFO L85 PathProgramCache]: Analyzing trace with hash -575718825, now seen corresponding path program 1 times [2021-11-07 02:04:13,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:13,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293179769] [2021-11-07 02:04:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:13,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:13,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:13,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:13,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:04:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:14,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:14,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:14,339 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 02:04:14,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 02:04:14,435 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:04:14,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 02:04:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:14,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:14,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:14,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293179769] [2021-11-07 02:04:14,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293179769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:14,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:14,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:04:14,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718762145] [2021-11-07 02:04:14,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:14,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:14,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:14,752 INFO L87 Difference]: Start difference. First operand 274 states and 339 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:24,417 INFO L93 Difference]: Finished difference Result 557 states and 668 transitions. [2021-11-07 02:04:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:04:24,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 44 [2021-11-07 02:04:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:24,422 INFO L225 Difference]: With dead ends: 557 [2021-11-07 02:04:24,422 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 02:04:24,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:04:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 02:04:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 273. [2021-11-07 02:04:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 271 states have (on average 1.2435424354243543) internal successors, (337), 272 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 337 transitions. [2021-11-07 02:04:24,438 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 337 transitions. Word has length 44 [2021-11-07 02:04:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:24,439 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 337 transitions. [2021-11-07 02:04:24,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 337 transitions. [2021-11-07 02:04:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:04:24,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:24,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:24,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:24,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:24,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 858593360, now seen corresponding path program 1 times [2021-11-07 02:04:24,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:24,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030765321] [2021-11-07 02:04:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:24,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:24,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:24,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:24,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:04:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:25,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:25,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:25,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:25,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030765321] [2021-11-07 02:04:25,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030765321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:25,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:25,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:04:25,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334355948] [2021-11-07 02:04:25,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:04:25,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:04:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:04:25,582 INFO L87 Difference]: Start difference. First operand 273 states and 337 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:25,740 INFO L93 Difference]: Finished difference Result 545 states and 679 transitions. [2021-11-07 02:04:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 69 [2021-11-07 02:04:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:25,743 INFO L225 Difference]: With dead ends: 545 [2021-11-07 02:04:25,744 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 02:04:25,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 02:04:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2021-11-07 02:04:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.1805054151624548) internal successors, (327), 278 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 327 transitions. [2021-11-07 02:04:25,759 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 327 transitions. Word has length 69 [2021-11-07 02:04:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:25,762 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 327 transitions. [2021-11-07 02:04:25,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 327 transitions. [2021-11-07 02:04:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:04:25,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:25,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:25,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:04:25,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:25,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:25,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-07 02:04:25,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:25,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108191012] [2021-11-07 02:04:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:25,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:25,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:25,989 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:25,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:04:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:26,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:26,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:26,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108191012] [2021-11-07 02:04:26,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108191012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:26,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:26,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:26,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058437339] [2021-11-07 02:04:26,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:26,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:26,890 INFO L87 Difference]: Start difference. First operand 279 states and 327 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 02:04:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:26,984 INFO L93 Difference]: Finished difference Result 516 states and 611 transitions. [2021-11-07 02:04:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 69 [2021-11-07 02:04:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:26,988 INFO L225 Difference]: With dead ends: 516 [2021-11-07 02:04:26,988 INFO L226 Difference]: Without dead ends: 282 [2021-11-07 02:04:26,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-07 02:04:27,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-07 02:04:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 280 states have (on average 1.1785714285714286) internal successors, (330), 281 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 330 transitions. [2021-11-07 02:04:27,006 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 330 transitions. Word has length 69 [2021-11-07 02:04:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:27,007 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 330 transitions. [2021-11-07 02:04:27,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 330 transitions. [2021-11-07 02:04:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:04:27,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:27,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:27,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:27,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:27,227 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash 982130832, now seen corresponding path program 1 times [2021-11-07 02:04:27,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:27,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772119622] [2021-11-07 02:04:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:27,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:27,231 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:27,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:04:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:27,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:27,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:28,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:28,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772119622] [2021-11-07 02:04:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772119622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:28,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339359029] [2021-11-07 02:04:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:28,255 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:28,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:28,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 02:04:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:29,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:29,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339359029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:29,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407467721] [2021-11-07 02:04:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:29,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:04:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:29,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:04:29,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 02:04:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:29,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:29,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:30,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:30,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:30,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:30,124 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 02:04:30,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 02:04:30,234 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:04:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 02:04:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:04:30,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:04:30,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407467721] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:30,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:04:30,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 02:04:30,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245992346] [2021-11-07 02:04:30,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:30,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:04:30,544 INFO L87 Difference]: Start difference. First operand 282 states and 330 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 02:04:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:42,396 INFO L93 Difference]: Finished difference Result 423 states and 493 transitions. [2021-11-07 02:04:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:04:42,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 72 [2021-11-07 02:04:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:42,401 INFO L225 Difference]: With dead ends: 423 [2021-11-07 02:04:42,401 INFO L226 Difference]: Without dead ends: 419 [2021-11-07 02:04:42,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:04:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-07 02:04:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 284. [2021-11-07 02:04:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 282 states have (on average 1.177304964539007) internal successors, (332), 283 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 332 transitions. [2021-11-07 02:04:42,418 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 332 transitions. Word has length 72 [2021-11-07 02:04:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:42,419 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 332 transitions. [2021-11-07 02:04:42,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 02:04:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 332 transitions. [2021-11-07 02:04:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 02:04:42,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:42,421 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:42,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 02:04:42,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:42,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:43,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:43,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash -786181332, now seen corresponding path program 1 times [2021-11-07 02:04:43,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:43,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842305747] [2021-11-07 02:04:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:43,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:43,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:43,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:43,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:04:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:43,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:43,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:43,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:44,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:44,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842305747] [2021-11-07 02:04:44,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842305747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:44,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865854510] [2021-11-07 02:04:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:44,292 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:44,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:44,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:44,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:04:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:04:45,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:04:45,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [865854510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:45,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:04:45,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:04:45,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036819894] [2021-11-07 02:04:45,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:45,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:45,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:04:45,991 INFO L87 Difference]: Start difference. First operand 284 states and 332 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:50,353 INFO L93 Difference]: Finished difference Result 605 states and 712 transitions. [2021-11-07 02:04:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 106 [2021-11-07 02:04:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:50,358 INFO L225 Difference]: With dead ends: 605 [2021-11-07 02:04:50,358 INFO L226 Difference]: Without dead ends: 366 [2021-11-07 02:04:50,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:04:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-07 02:04:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2021-11-07 02:04:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 357 states have (on average 1.1820728291316527) internal successors, (422), 358 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 422 transitions. [2021-11-07 02:04:50,378 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 422 transitions. Word has length 106 [2021-11-07 02:04:50,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:50,379 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 422 transitions. [2021-11-07 02:04:50,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,380 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 422 transitions. [2021-11-07 02:04:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 02:04:50,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:50,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:50,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:50,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:50,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:50,798 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 530496366, now seen corresponding path program 1 times [2021-11-07 02:04:50,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:50,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068597919] [2021-11-07 02:04:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:50,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:50,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:50,801 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:50,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:04:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:51,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:51,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:51,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:52,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:52,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068597919] [2021-11-07 02:04:52,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068597919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:52,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651597759] [2021-11-07 02:04:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:52,131 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:52,132 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:52,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:04:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:53,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:53,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:53,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:04:53,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [651597759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:53,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779882286] [2021-11-07 02:04:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:53,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:04:53,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:53,610 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:04:53,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 02:04:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:54,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:04:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:04:54,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779882286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:54,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:04:54,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-11-07 02:04:54,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175168119] [2021-11-07 02:04:54,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:04:54,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:54,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:04:54,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:04:54,944 INFO L87 Difference]: Start difference. First operand 359 states and 422 transitions. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:55,307 INFO L93 Difference]: Finished difference Result 676 states and 805 transitions. [2021-11-07 02:04:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:04:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 02:04:55,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:55,313 INFO L225 Difference]: With dead ends: 676 [2021-11-07 02:04:55,314 INFO L226 Difference]: Without dead ends: 367 [2021-11-07 02:04:55,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:04:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-07 02:04:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2021-11-07 02:04:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 365 states have (on average 1.178082191780822) internal successors, (430), 366 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 430 transitions. [2021-11-07 02:04:55,335 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 430 transitions. Word has length 113 [2021-11-07 02:04:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:55,336 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 430 transitions. [2021-11-07 02:04:55,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 430 transitions. [2021-11-07 02:04:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 02:04:55,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:55,338 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:55,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:55,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:55,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:55,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:04:55,956 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1097324242, now seen corresponding path program 2 times [2021-11-07 02:04:55,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:55,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655239473] [2021-11-07 02:04:55,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:04:55,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:55,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:55,959 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:55,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:04:56,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:04:56,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:04:56,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:04:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:04:57,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:04:58,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:58,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655239473] [2021-11-07 02:04:58,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655239473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:58,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1866313158] [2021-11-07 02:04:58,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:04:58,054 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:58,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:58,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:58,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:04:59,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:04:59,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:04:59,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:04:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:04:59,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:05:00,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1866313158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:00,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724523250] [2021-11-07 02:05:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:05:00,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:05:00,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:05:00,340 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:05:00,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 02:05:01,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:05:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:05:01,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:05:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:05:01,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:05:02,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724523250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:02,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:05:02,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 8, 8] total 27 [2021-11-07 02:05:02,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897933783] [2021-11-07 02:05:02,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 02:05:03,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 02:05:03,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:05:03,001 INFO L87 Difference]: Start difference. First operand 367 states and 430 transitions. Second operand has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:06,931 INFO L93 Difference]: Finished difference Result 1003 states and 1202 transitions. [2021-11-07 02:05:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 02:05:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 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 121 [2021-11-07 02:05:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:06,938 INFO L225 Difference]: With dead ends: 1003 [2021-11-07 02:05:06,938 INFO L226 Difference]: Without dead ends: 690 [2021-11-07 02:05:06,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 02:05:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-07 02:05:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 389. [2021-11-07 02:05:06,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 387 states have (on average 1.1705426356589148) internal successors, (453), 388 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 453 transitions. [2021-11-07 02:05:06,967 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 453 transitions. Word has length 121 [2021-11-07 02:05:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:06,967 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 453 transitions. [2021-11-07 02:05:06,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 453 transitions. [2021-11-07 02:05:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 02:05:06,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:06,970 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:06,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:07,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-07 02:05:07,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:07,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:07,578 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:07,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1558698834, now seen corresponding path program 3 times [2021-11-07 02:05:07,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:07,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012702453] [2021-11-07 02:05:07,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:05:07,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:07,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:07,580 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:07,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:05:15,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 02:05:15,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:05:15,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:05:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 02:05:16,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 02:05:18,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:18,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012702453] [2021-11-07 02:05:18,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012702453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:18,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1304897125] [2021-11-07 02:05:18,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:05:18,305 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:18,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:18,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:06:08,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 02:06:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:06:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:06:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 02:06:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 02:06:09,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1304897125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:09,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997095535] [2021-11-07 02:06:09,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:06:09,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:06:09,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:09,569 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:06:09,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d708dcb-8dd4-4a8a-89ad-58bbe7ea8bcb/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process